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HBASE-13202 Procedure v2 - core framework

This commit is contained in:
Matteo Bertozzi 2015-04-09 20:44:56 +01:00
parent d20c08ea58
commit 04246c6c3d
40 changed files with 14934 additions and 5 deletions
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12
hbase-common/src/main/java/org/apache/hadoop/hbase/io/util/StreamUtils.java
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@ -120,7 +120,7 @@ public class StreamUtils {
/**
* Reads a varInt value stored in an array.
*
*
* @param input
* Input array where the varInt is available
* @param offset
@ -198,4 +198,14 @@ public class StreamUtils {
out.write((byte) (0xff & (v >> 8)));
out.write((byte) (0xff & v));
}
public static long readLong(InputStream in) throws IOException {
long result = 0;
for (int shift = 56; shift >= 0; shift -= 8) {
long x = in.read();
if (x < 0) throw new IOException("EOF");
result |= (x << shift);
}
return result;
}
}

109
hbase-common/src/main/java/org/apache/hadoop/hbase/util/ForeignExceptionUtil.java Normal file
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@ -0,0 +1,109 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.util;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.ipc.RemoteException;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.hbase.protobuf.generated.ErrorHandlingProtos.ForeignExceptionMessage;
import org.apache.hadoop.hbase.protobuf.generated.ErrorHandlingProtos.GenericExceptionMessage;
import org.apache.hadoop.hbase.protobuf.generated.ErrorHandlingProtos.StackTraceElementMessage;
/**
* Helper to convert Exceptions and StackTraces from/to protobuf.
* (see ErrorHandling.proto for the internal of the proto messages)
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public final class ForeignExceptionUtil {
private ForeignExceptionUtil() { }
public static IOException toIOException(final ForeignExceptionMessage eem) {
GenericExceptionMessage gem = eem.getGenericException();
StackTraceElement[] trace = toStackTrace(gem.getTraceList());
RemoteException re = new RemoteException(gem.getClassName(), gem.getMessage());
re.setStackTrace(trace);
return re.unwrapRemoteException();
}
public static ForeignExceptionMessage toProtoForeignException(String source, Throwable t) {
GenericExceptionMessage.Builder gemBuilder = GenericExceptionMessage.newBuilder();
gemBuilder.setClassName(t.getClass().getName());
if (t.getMessage() != null) {
gemBuilder.setMessage(t.getMessage());
}
// set the stack trace, if there is one
List<StackTraceElementMessage> stack = toProtoStackTraceElement(t.getStackTrace());
if (stack != null) {
gemBuilder.addAllTrace(stack);
}
GenericExceptionMessage payload = gemBuilder.build();
ForeignExceptionMessage.Builder exception = ForeignExceptionMessage.newBuilder();
exception.setGenericException(payload).setSource(source);
return exception.build();
}
/**
* Convert a stack trace to list of {@link StackTraceElement}.
* @param trace the stack trace to convert to protobuf message
* @return <tt>null</tt> if the passed stack is <tt>null</tt>.
*/
public static List<StackTraceElementMessage> toProtoStackTraceElement(StackTraceElement[] trace) {
// if there is no stack trace, ignore it and just return the message
if (trace == null) return null;
// build the stack trace for the message
List<StackTraceElementMessage> pbTrace = new ArrayList<StackTraceElementMessage>(trace.length);
for (StackTraceElement elem : trace) {
StackTraceElementMessage.Builder stackBuilder = StackTraceElementMessage.newBuilder();
stackBuilder.setDeclaringClass(elem.getClassName());
if (elem.getFileName() != null) {
stackBuilder.setFileName(elem.getFileName());
}
stackBuilder.setLineNumber(elem.getLineNumber());
stackBuilder.setMethodName(elem.getMethodName());
pbTrace.add(stackBuilder.build());
}
return pbTrace;
}
/**
* Unwind a serialized array of {@link StackTraceElementMessage}s to a
* {@link StackTraceElement}s.
* @param traceList list that was serialized
* @return the deserialized list or <tt>null</tt> if it couldn't be unwound (e.g. wasn't set on
* the sender).
*/
public static StackTraceElement[] toStackTrace(List<StackTraceElementMessage> traceList) {
if (traceList == null || traceList.size() == 0) {
return new StackTraceElement[0]; // empty array
}
StackTraceElement[] trace = new StackTraceElement[traceList.size()];
for (int i = 0; i < traceList.size(); i++) {
StackTraceElementMessage elem = traceList.get(i);
trace[i] = new StackTraceElement(
elem.getDeclaringClass(), elem.getMethodName(),
elem.hasFileName() ? elem.getFileName() : null,
elem.getLineNumber());
}
return trace;
}
}

181
hbase-procedure/pom.xml Normal file
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@ -0,0 +1,181 @@
<?xml version="1.0"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<!--
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
-->
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>hbase</artifactId>
<groupId>org.apache.hbase</groupId>
<version>2.0.0-SNAPSHOT</version>
<relativePath>..</relativePath>
</parent>
<artifactId>hbase-procedure</artifactId>
<name>HBase - Procedure</name>
<description>Procedure Framework</description>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-site-plugin</artifactId>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
<!-- Make a jar and put the sources in the jar -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-source-plugin</artifactId>
</plugin>
<plugin>
<!--Make it so assembly:single does nothing in here-->
<artifactId>maven-assembly-plugin</artifactId>
<version>${maven.assembly.version}</version>
<configuration>
<skipAssembly>true</skipAssembly>
</configuration>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<!-- Always skip the second part executions, since we only run
simple unit tests in this module. -->
<executions>
<execution>
<id>secondPartTestsExecution</id>
<phase>test</phase>
<goals>
<goal>test</goal>
</goals>
<configuration>
<skip>true</skip>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-common</artifactId>
<version>${project.version}</version>
<classifier>tests</classifier>
</dependency>
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-annotations</artifactId>
<type>test-jar</type>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-protocol</artifactId>
</dependency>
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-common</artifactId>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</dependency>
</dependencies>
<profiles>
<!-- Profiles for building against different hadoop versions -->
<profile>
<id>hadoop-1.1</id>
<activation>
<property>
<!--Below formatting for dev-support/generate-hadoopX-poms.sh-->
<!--h1--><name>hadoop.profile</name><value>1.1</value>
</property>
</activation>
<dependencies>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-core</artifactId>
</dependency>
</dependencies>
</profile>
<profile>
<id>hadoop-1.0</id>
<activation>
<property>
<name>hadoop.profile</name>
<value>1.0</value>
</property>
</activation>
<dependencies>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-core</artifactId>
</dependency>
</dependencies>
</profile>
<!--
profile for building against Hadoop 2.0.0-alpha. Activate using:
mvn -Dhadoop.profile=2.0
-->
<profile>
<id>hadoop-2.0</id>
<activation>
<property>
<!--Below formatting for dev-support/generate-hadoopX-poms.sh-->
<!--h2--><name>!hadoop.profile</name>
</property>
</activation>
<dependencies>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
</dependency>
</dependencies>
</profile>
<!--
profile for building against Hadoop 3.0.x. Activate using:
mvn -Dhadoop.profile=3.0
-->
<profile>
<id>hadoop-3.0</id>
<activation>
<property>
<name>hadoop.profile</name>
<value>3.0</value>
</property>
</activation>
<properties>
<hadoop.version>3.0-SNAPSHOT</hadoop.version>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
</dependency>
</dependencies>
</profile>
</profiles>
</project>

28
hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/OnePhaseProcedure.java Normal file
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@ -0,0 +1,28 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
@InterfaceAudience.Public
@InterfaceStability.Evolving
public abstract class OnePhaseProcedure<TEnvironment> extends Procedure<TEnvironment> {
// TODO (e.g. used by online snapshots)
}

680
hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/Procedure.java Normal file
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@ -0,0 +1,680 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Constructor;
import java.lang.reflect.Modifier;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeoutException;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.hbase.procedure2.util.StringUtils;
import org.apache.hadoop.hbase.protobuf.generated.ProcedureProtos;
import org.apache.hadoop.hbase.protobuf.generated.ProcedureProtos.ProcedureState;
import org.apache.hadoop.hbase.util.ByteStringer;
import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import com.google.protobuf.ByteString;
/**
* Base Procedure class responsible to handle the Procedure Metadata
* e.g. state, startTime, lastUpdate, stack-indexes, ...
*
* execute() is called each time the procedure is executed.
* it may be called multiple times in case of failure and restart, so the
* code must be idempotent.
* the return is a set of sub-procedures or null in case the procedure doesn't
* have sub-procedures. Once the sub-procedures are successfully completed
* the execute() method is called again, you should think at it as a stack:
* -> step 1
* ---> step 2
* -> step 1
*
* rollback() is called when the procedure or one of the sub-procedures is failed.
* the rollback step is supposed to cleanup the resources created during the
* execute() step. in case of failure and restart rollback() may be called
* multiple times, so the code must be idempotent.
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public abstract class Procedure<TEnvironment> implements Comparable<Procedure> {
// unchanged after initialization
private String owner = null;
private Long parentProcId = null;
private Long procId = null;
private long startTime;
// runtime state, updated every operation
private ProcedureState state = ProcedureState.INITIALIZING;
private Integer timeout = null;
private int[] stackIndexes = null;
private int childrenLatch = 0;
private long lastUpdate;
private RemoteProcedureException exception = null;
private byte[] result = null;
/**
* The main code of the procedure. It must be idempotent since execute()
* may be called multiple time in case of machine failure in the middle
* of the execution.
* @return a set of sub-procedures or null if there is nothing else to execute.
*/
protected abstract Procedure[] execute(TEnvironment env)
throws ProcedureYieldException;
/**
* The code to undo what done by the execute() code.
* It is called when the procedure or one of the sub-procedure failed or an
* abort was requested. It should cleanup all the resources created by
* the execute() call. The implementation must be idempotent since rollback()
* may be called multiple time in case of machine failure in the middle
* of the execution.
* @throws IOException temporary failure, the rollback will retry later
*/
protected abstract void rollback(TEnvironment env)
throws IOException;
/**
* The abort() call is asynchronous and each procedure must decide how to deal
* with that, if they want to be abortable. The simplest implementation
* is to have an AtomicBoolean set in the abort() method and then the execute()
* will check if the abort flag is set or not.
* abort() may be called multiple times from the client, so the implementation
* must be idempotent.
*
* NOTE: abort() is not like Thread.interrupt() it is just a notification
* that allows the procedure implementor where to abort to avoid leak and
* have a better control on what was executed and what not.
*/
protected abstract boolean abort(TEnvironment env);
/**
* The user-level code of the procedure may have some state to
* persist (e.g. input arguments) to be able to resume on failure.
* @param stream the stream that will contain the user serialized data
*/
protected abstract void serializeStateData(final OutputStream stream)
throws IOException;
/**
* Called on store load to allow the user to decode the previously serialized
* state.
* @param stream the stream that contains the user serialized data
*/
protected abstract void deserializeStateData(final InputStream stream)
throws IOException;
/**
* The user should override this method, and try to take a lock if necessary.
* A lock can be anything, and it is up to the implementor.
* Example: in our Master we can execute request in parallel for different tables
* create t1 and create t2 can be executed at the same time.
* anything else on t1/t2 is queued waiting that specific table create to happen.
*
* @return true if the lock was acquired and false otherwise
*/
protected boolean acquireLock(final TEnvironment env) {
return true;
}
/**
* The user should override this method, and release lock if necessary.
*/
protected void releaseLock(final TEnvironment env) {
// no-op
}
/**
* Called when the procedure is loaded for replay.
* The procedure implementor may use this method to perform some quick
* operation before replay.
* e.g. failing the procedure if the state on replay may be unknown.
*/
protected void beforeReplay(final TEnvironment env) {
// no-op
}
/**
* Called when the procedure is marked as completed (success or rollback).
* The procedure implementor may use this method to cleanup in-memory states.
* This operation will not be retried on failure.
*/
protected void completionCleanup(final TEnvironment env) {
// no-op
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
toStringClassDetails(sb);
if (procId != null) {
sb.append(" id=");
sb.append(getProcId());
}
if (hasParent()) {
sb.append(" parent=");
sb.append(getParentProcId());
}
if (hasOwner()) {
sb.append(" owner=");
sb.append(getOwner());
}
sb.append(" state=");
sb.append(getState());
return sb.toString();
}
/**
* Extend the toString() information with the procedure details
* e.g. className and parameters
* @param builder the string builder to use to append the proc specific information
*/
protected void toStringClassDetails(StringBuilder builder) {
builder.append(getClass().getName());
}
/**
* @return the serialized result if any, otherwise null
*/
public byte[] getResult() {
return result;
}
/**
* The procedure may leave a "result" on completion.
* @param result the serialized result that will be passed to the client
*/
protected void setResult(final byte[] result) {
this.result = result;
}
public long getProcId() {
return procId;
}
public boolean hasParent() {
return parentProcId != null;
}
public boolean hasException() {
return exception != null;
}
public boolean hasTimeout() {
return timeout != null;
}
public long getParentProcId() {
return parentProcId;
}
/**
* @return true if the procedure has failed.
* true may mean failed but not yet rolledback or failed and rolledback.
*/
public synchronized boolean isFailed() {
return exception != null || state == ProcedureState.ROLLEDBACK;
}
/**
* @return true if the procedure is finished successfully.
*/
public synchronized boolean isSuccess() {
return state == ProcedureState.FINISHED && exception == null;
}
/**
* @return true if the procedure is finished. The Procedure may be completed
* successfuly or failed and rolledback.
*/
public synchronized boolean isFinished() {
switch (state) {
case ROLLEDBACK:
return true;
case FINISHED:
return exception == null;
default:
break;
}
return false;
}
/**
* @return true if the procedure is waiting for a child to finish or for an external event.
*/
public synchronized boolean isWaiting() {
switch (state) {
case WAITING:
case WAITING_TIMEOUT:
return true;
default:
break;
}
return false;
}
public synchronized RemoteProcedureException getException() {
return exception;
}
public long getStartTime() {
return startTime;
}
public synchronized long getLastUpdate() {
return lastUpdate;
}
public synchronized long elapsedTime() {
return lastUpdate - startTime;
}
/**
* @param timeout timeout in msec
*/
protected void setTimeout(final int timeout) {
this.timeout = timeout;
}
/**
* @return the timeout in msec
*/
public int getTimeout() {
return timeout;
}
/**
* @return the remaining time before the timeout
*/
public long getTimeRemaining() {
return Math.max(0, timeout - (EnvironmentEdgeManager.currentTime() - startTime));
}
protected void setOwner(final String owner) {
this.owner = StringUtils.isEmpty(owner) ? null : owner;
}
public String getOwner() {
return owner;
}
public boolean hasOwner() {
return owner != null;
}
@VisibleForTesting
@InterfaceAudience.Private
protected synchronized void setState(final ProcedureState state) {
this.state = state;
updateTimestamp();
}
@InterfaceAudience.Private
protected synchronized ProcedureState getState() {
return state;
}
protected void setFailure(final String source, final Throwable cause) {
setFailure(new RemoteProcedureException(source, cause));
}
protected synchronized void setFailure(final RemoteProcedureException exception) {
this.exception = exception;
if (!isFinished()) {
setState(ProcedureState.FINISHED);
}
}
protected void setAbortFailure(final String source, final String msg) {
setFailure(source, new ProcedureAbortedException(msg));
}
@InterfaceAudience.Private
protected synchronized boolean setTimeoutFailure() {
if (state == ProcedureState.WAITING_TIMEOUT) {
long timeDiff = EnvironmentEdgeManager.currentTime() - lastUpdate;
setFailure("ProcedureExecutor", new TimeoutException(
"Operation timed out after " + StringUtils.humanTimeDiff(timeDiff)));
return true;
}
return false;
}
/**
* Called by the ProcedureExecutor to assign the ID to the newly created procedure.
*/
@VisibleForTesting
@InterfaceAudience.Private
protected void setProcId(final long procId) {
this.procId = procId;
this.startTime = EnvironmentEdgeManager.currentTime();
setState(ProcedureState.RUNNABLE);
}
/**
* Called by the ProcedureExecutor to assign the parent to the newly created procedure.
*/
@InterfaceAudience.Private
protected void setParentProcId(final long parentProcId) {
this.parentProcId = parentProcId;
}
/**
* Internal method called by the ProcedureExecutor that starts the
* user-level code execute().
*/
@InterfaceAudience.Private
protected Procedure[] doExecute(final TEnvironment env)
throws ProcedureYieldException {
try {
updateTimestamp();
return execute(env);
} finally {
updateTimestamp();
}
}
/**
* Internal method called by the ProcedureExecutor that starts the
* user-level code rollback().
*/
@InterfaceAudience.Private
protected void doRollback(final TEnvironment env) throws IOException {
try {
updateTimestamp();
rollback(env);
} finally {
updateTimestamp();
}
}
/**
* Called on store load to initialize the Procedure internals after
* the creation/deserialization.
*/
@InterfaceAudience.Private
protected void setStartTime(final long startTime) {
this.startTime = startTime;
}
/**
* Called on store load to initialize the Procedure internals after
* the creation/deserialization.
*/
private synchronized void setLastUpdate(final long lastUpdate) {
this.lastUpdate = lastUpdate;
}
protected synchronized void updateTimestamp() {
this.lastUpdate = EnvironmentEdgeManager.currentTime();
}
/**
* Called by the ProcedureExecutor on procedure-load to restore the latch state
*/
@InterfaceAudience.Private
protected synchronized void setChildrenLatch(final int numChildren) {
this.childrenLatch = numChildren;
}
/**
* Called by the ProcedureExecutor on procedure-load to restore the latch state
*/
@InterfaceAudience.Private
protected synchronized void incChildrenLatch() {
// TODO: can this be inferred from the stack? I think so...
this.childrenLatch++;
}
/**
* Called by the ProcedureExecutor to notify that one of the sub-procedures
* has completed.
*/
@InterfaceAudience.Private
protected synchronized boolean childrenCountDown() {
assert childrenLatch > 0;
return --childrenLatch == 0;
}
/**
* Called by the RootProcedureState on procedure execution.
* Each procedure store its stack-index positions.
*/
@InterfaceAudience.Private
protected synchronized void addStackIndex(final int index) {
if (stackIndexes == null) {
stackIndexes = new int[] { index };
} else {
int count = stackIndexes.length;
stackIndexes = Arrays.copyOf(stackIndexes, count + 1);
stackIndexes[count] = index;
}
}
@InterfaceAudience.Private
protected synchronized boolean removeStackIndex() {
if (stackIndexes.length > 1) {
stackIndexes = Arrays.copyOf(stackIndexes, stackIndexes.length - 1);
return false;
} else {
stackIndexes = null;
return true;
}
}
/**
* Called on store load to initialize the Procedure internals after
* the creation/deserialization.
*/
@InterfaceAudience.Private
protected synchronized void setStackIndexes(final List<Integer> stackIndexes) {
this.stackIndexes = new int[stackIndexes.size()];
for (int i = 0; i < this.stackIndexes.length; ++i) {
this.stackIndexes[i] = stackIndexes.get(i);
}
}
@InterfaceAudience.Private
protected synchronized boolean wasExecuted() {
return stackIndexes != null;
}
@InterfaceAudience.Private
protected synchronized int[] getStackIndexes() {
return stackIndexes;
}
@Override
public int compareTo(final Procedure other) {
long diff = getProcId() - other.getProcId();
return (diff < 0) ? -1 : (diff > 0) ? 1 : 0;
}
/*
* Helper to lookup the root Procedure ID given a specified procedure.
*/
@InterfaceAudience.Private
protected static Long getRootProcedureId(final Map<Long, Procedure> procedures, Procedure proc) {
while (proc.hasParent()) {
proc = procedures.get(proc.getParentProcId());
if (proc == null) return null;
}
return proc.getProcId();
}
protected static Procedure newInstance(final String className) throws IOException {
try {
Class<?> clazz = Class.forName(className);
if (!Modifier.isPublic(clazz.getModifiers())) {
throw new Exception("the " + clazz + " class is not public");
}
Constructor<?> ctor = clazz.getConstructor();
assert ctor != null : "no constructor found";
if (!Modifier.isPublic(ctor.getModifiers())) {
throw new Exception("the " + clazz + " constructor is not public");
}
return (Procedure)ctor.newInstance();
} catch (Exception e) {
throw new IOException("The procedure class " + className +
" must be accessible and have an empty constructor", e);
}
}
protected static void validateClass(final Procedure proc) throws IOException {
try {
Class<?> clazz = proc.getClass();
if (!Modifier.isPublic(clazz.getModifiers())) {
throw new Exception("the " + clazz + " class is not public");
}
Constructor<?> ctor = clazz.getConstructor();
assert ctor != null;
if (!Modifier.isPublic(ctor.getModifiers())) {
throw new Exception("the " + clazz + " constructor is not public");
}
} catch (Exception e) {
throw new IOException("The procedure class " + proc.getClass().getName() +
" must be accessible and have an empty constructor", e);
}
}
/**
* Helper to convert the procedure to protobuf.
* Used by ProcedureStore implementations.
*/
@InterfaceAudience.Private
public static ProcedureProtos.Procedure convert(final Procedure proc)
throws IOException {
Preconditions.checkArgument(proc != null);
validateClass(proc);
ProcedureProtos.Procedure.Builder builder = ProcedureProtos.Procedure.newBuilder()
.setClassName(proc.getClass().getName())
.setProcId(proc.getProcId())
.setState(proc.getState())
.setStartTime(proc.getStartTime())
.setLastUpdate(proc.getLastUpdate());
if (proc.hasParent()) {
builder.setParentId(proc.getParentProcId());
}
if (proc.hasTimeout()) {
builder.setTimeout(proc.getTimeout());
}
if (proc.hasOwner()) {
builder.setOwner(proc.getOwner());
}
int[] stackIds = proc.getStackIndexes();
if (stackIds != null) {
for (int i = 0; i < stackIds.length; ++i) {
builder.addStackId(stackIds[i]);
}
}
if (proc.hasException()) {
RemoteProcedureException exception = proc.getException();
builder.setException(
RemoteProcedureException.toProto(exception.getSource(), exception.getCause()));
}
byte[] result = proc.getResult();
if (result != null) {
builder.setResult(ByteStringer.wrap(result));
}
ByteString.Output stateStream = ByteString.newOutput();
proc.serializeStateData(stateStream);
if (stateStream.size() > 0) {
builder.setStateData(stateStream.toByteString());
}
return builder.build();
}
/**
* Helper to convert the protobuf procedure.
* Used by ProcedureStore implementations.
*
* TODO: OPTIMIZATION: some of the field never change during the execution
* (e.g. className, procId, parentId, ...).
* We can split in 'data' and 'state', and the store
* may take advantage of it by storing the data only on insert().
*/
@InterfaceAudience.Private
public static Procedure convert(final ProcedureProtos.Procedure proto)
throws IOException {
// Procedure from class name
Procedure proc = Procedure.newInstance(proto.getClassName());
// set fields
proc.setProcId(proto.getProcId());
proc.setState(proto.getState());
proc.setStartTime(proto.getStartTime());
proc.setLastUpdate(proto.getLastUpdate());
if (proto.hasParentId()) {
proc.setParentProcId(proto.getParentId());
}
if (proto.hasOwner()) {
proc.setOwner(proto.getOwner());
}
if (proto.hasTimeout()) {
proc.setTimeout(proto.getTimeout());
}
if (proto.getStackIdCount() > 0) {
proc.setStackIndexes(proto.getStackIdList());
}
if (proto.hasException()) {
assert proc.getState() == ProcedureState.FINISHED ||
proc.getState() == ProcedureState.ROLLEDBACK :
"The procedure must be failed (waiting to rollback) or rolledback";
proc.setFailure(RemoteProcedureException.fromProto(proto.getException()));
}
if (proto.hasResult()) {
proc.setResult(proto.getResult().toByteArray());
}
// we want to call deserialize even when the stream is empty, mainly for testing.
proc.deserializeStateData(proto.getStateData().newInput());
return proc;
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
/**
* Thrown when a procedure is aborted
*/
@InterfaceAudience.Public
@InterfaceStability.Stable
public class ProcedureAbortedException extends ProcedureException {
/** default constructor */
public ProcedureAbortedException() {
super();
}
/**
* Constructor
* @param s message
*/
public ProcedureAbortedException(String s) {
super(s);
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import java.io.IOException;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
@InterfaceAudience.Public
@InterfaceStability.Stable
public class ProcedureException extends IOException {
/** default constructor */
public ProcedureException() {
super();
}
/**
* Constructor
* @param s message
*/
public ProcedureException(String s) {
super(s);
}
public ProcedureException(Throwable t) {
super(t);
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import java.util.Map;
import java.util.concurrent.locks.ReentrantLock;
import java.util.concurrent.ConcurrentSkipListMap;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
/**
* This class is a container of queues that allows to select a queue
* in a round robin fashion, considering priority of the queue.
*
* the quantum is just how many poll() will return the same object.
* e.g. if quantum is 1 and you have A and B as object you'll get: A B A B
* e.g. if quantum is 2 and you have A and B as object you'll get: A A B B A A B B
* then the object priority is just a priority * quantum
*
* Example:
* - three queues (A, B, C) with priorities (1, 1, 2)
* - The first poll() will return A
* - The second poll() will return B
* - The third and forth poll() will return C
* - and so on again and again.
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class ProcedureFairRunQueues<TKey, TQueue extends ProcedureFairRunQueues.FairObject> {
private ConcurrentSkipListMap<TKey, TQueue> objMap =
new ConcurrentSkipListMap<TKey, TQueue>();
private final ReentrantLock lock = new ReentrantLock();
private final int quantum;
private Map.Entry<TKey, TQueue> current = null;
private int currentQuantum = 0;
public interface FairObject {
boolean isAvailable();
int getPriority();
}
/**
* @param quantum how many poll() will return the same object.
*/
public ProcedureFairRunQueues(final int quantum) {
this.quantum = quantum;
}
public TQueue get(final TKey key) {
return objMap.get(key);
}
public TQueue add(final TKey key, final TQueue queue) {
TQueue oldq = objMap.putIfAbsent(key, queue);
return oldq != null ? oldq : queue;
}
public TQueue remove(final TKey key) {
TQueue queue = objMap.get(key);
if (queue != null) {
lock.lock();
try {
queue = objMap.remove(key);
if (current != null && queue == current.getValue()) {
currentQuantum = 0;
current = null;
}
} finally {
lock.unlock();
}
}
return queue;
}
public void clear() {
lock.lock();
try {
current = null;
objMap.clear();
} finally {
lock.unlock();
}
}
/**
* @return the next available item if present
*/
public TQueue poll() {
lock.lock();
try {
TQueue queue;
if (currentQuantum == 0) {
if (nextObject() == null) {
// nothing here
return null;
}
queue = current.getValue();
currentQuantum = calculateQuantum(queue) - 1;
} else {
currentQuantum--;
queue = current.getValue();
}
if (!queue.isAvailable()) {
Map.Entry<TKey, TQueue> last = current;
// Try the next one
do {
if (nextObject() == null)
return null;
} while (current.getValue() != last.getValue() && !current.getValue().isAvailable());
queue = current.getValue();
currentQuantum = calculateQuantum(queue) - 1;
}
return queue;
} finally {
lock.unlock();
}
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append('{');
for (Map.Entry<TKey, TQueue> entry: objMap.entrySet()) {
builder.append(entry.getKey());
builder.append(':');
builder.append(entry.getValue());
}
builder.append('}');
return builder.toString();
}
private Map.Entry<TKey, TQueue> nextObject() {
Map.Entry<TKey, TQueue> next = null;
// If we have already a key, try the next one
if (current != null) {
next = objMap.higherEntry(current.getKey());
}
// if there is no higher key, go back to the first
current = (next != null) ? next : objMap.firstEntry();
return current;
}
private int calculateQuantum(final TQueue fairObject) {
// TODO
return Math.max(1, fairObject.getPriority() * quantum);
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
/**
* Once a Procedure completes the ProcedureExecutor takes all the useful
* information of the procedure (e.g. exception/result) and creates a ProcedureResult.
* The user of the Procedure framework will get the procedure result with
* procedureExecutor.getResult(procId)
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class ProcedureResult {
private final RemoteProcedureException exception;
private final long lastUpdate;
private final long startTime;
private final byte[] result;
private long clientAckTime = -1;
public ProcedureResult(final long startTime, final long lastUpdate,
final RemoteProcedureException exception) {
this.lastUpdate = lastUpdate;
this.startTime = startTime;
this.exception = exception;
this.result = null;
}
public ProcedureResult(final long startTime, final long lastUpdate, final byte[] result) {
this.lastUpdate = lastUpdate;
this.startTime = startTime;
this.exception = null;
this.result = result;
}
public boolean isFailed() {
return exception != null;
}
public RemoteProcedureException getException() {
return exception;
}
public boolean hasResultData() {
return result != null;
}
public byte[] getResult() {
return result;
}
public long getStartTime() {
return startTime;
}
public long getLastUpdate() {
return lastUpdate;
}
public long executionTime() {
return lastUpdate - startTime;
}
public boolean hasClientAckTime() {
return clientAckTime > 0;
}
public long getClientAckTime() {
return clientAckTime;
}
@InterfaceAudience.Private
protected void setClientAckTime(final long timestamp) {
this.clientAckTime = timestamp;
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
/**
* Keep track of the runnable procedures
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public interface ProcedureRunnableSet {
/**
* Inserts the specified element at the front of this queue.
* @param proc the Procedure to add
*/
void addFront(Procedure proc);
/**
* Inserts the specified element at the end of this queue.
* @param proc the Procedure to add
*/
void addBack(Procedure proc);
/**
* The procedure can't run at the moment.
* add it back to the queue, giving priority to someone else.
* @param proc the Procedure to add back to the list
*/
void yield(Procedure proc);
/**
* The procedure in execution completed.
* This can be implemented to perform cleanups.
* @param proc the Procedure that completed the execution.
*/
void completionCleanup(Procedure proc);
/**
* Fetch one Procedure from the queue
* @return the Procedure ID to execute, or null if nothing present.
*/
Long poll();
/**
* In case the class is blocking on poll() waiting for items to be added,
* this method should awake poll() and poll() should return.
*/
void signalAll();
/**
* Returns the number of elements in this collection.
* @return the number of elements in this collection.
*/
int size();
/**
* Removes all of the elements from this collection.
*/
void clear();
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import java.util.ArrayDeque;
import java.util.Deque;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.ReentrantLock;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
/**
* Simple runqueue for the procedures
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class ProcedureSimpleRunQueue implements ProcedureRunnableSet {
private final Deque<Long> runnables = new ArrayDeque<Long>();
private final ReentrantLock lock = new ReentrantLock();
private final Condition waitCond = lock.newCondition();
@Override
public void addFront(final Procedure proc) {
lock.lock();
try {
runnables.addFirst(proc.getProcId());
waitCond.signal();
} finally {
lock.unlock();
}
}
@Override
public void addBack(final Procedure proc) {
lock.lock();
try {
runnables.addLast(proc.getProcId());
waitCond.signal();
} finally {
lock.unlock();
}
}
@Override
public void yield(final Procedure proc) {
addBack(proc);
}
@Override
@edu.umd.cs.findbugs.annotations.SuppressWarnings("WA_AWAIT_NOT_IN_LOOP")
public Long poll() {
lock.lock();
try {
if (runnables.isEmpty()) {
waitCond.await();
if (!runnables.isEmpty()) {
return runnables.pop();
}
} else {
return runnables.pop();
}
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
return null;
} finally {
lock.unlock();
}
return null;
}
@Override
public void signalAll() {
lock.lock();
try {
waitCond.signalAll();
} finally {
lock.unlock();
}
}
@Override
public void clear() {
lock.lock();
try {
runnables.clear();
} finally {
lock.unlock();
}
}
@Override
public int size() {
lock.lock();
try {
return runnables.size();
} finally {
lock.unlock();
}
}
@Override
public void completionCleanup(Procedure proc) {
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
// TODO: Not used yet
@InterfaceAudience.Public
@InterfaceStability.Stable
public class ProcedureYieldException extends ProcedureException {
/** default constructor */
public ProcedureYieldException() {
super();
}
/**
* Constructor
* @param s message
*/
public ProcedureYieldException(String s) {
super(s);
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import java.io.IOException;
import org.apache.hadoop.ipc.RemoteException;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.hbase.protobuf.generated.ErrorHandlingProtos.ForeignExceptionMessage;
import org.apache.hadoop.hbase.util.ForeignExceptionUtil;
import com.google.protobuf.InvalidProtocolBufferException;
/**
* A RemoteProcedureException is an exception from another thread or process.
* <p>
* RemoteProcedureExceptions are sent to 'remote' peers to signal an abort in the face of failures.
* When serialized for transmission we encode using Protobufs to ensure version compatibility.
* <p>
* RemoteProcedureException exceptions contain a Throwable as its cause.
* This can be a "regular" exception generated locally or a ProxyThrowable that is a representation
* of the original exception created on original 'remote' source. These ProxyThrowables have their
* their stacks traces and messages overridden to reflect the original 'remote' exception.
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
@SuppressWarnings("serial")
public class RemoteProcedureException extends ProcedureException {
/**
* Name of the throwable's source such as a host or thread name. Must be non-null.
*/
private final String source;
/**
* Create a new RemoteProcedureException that can be serialized.
* It is assumed that this came form a local source.
* @param source
* @param cause
*/
public RemoteProcedureException(String source, Throwable cause) {
super(cause);
assert source != null;
assert cause != null;
this.source = source;
}
public String getSource() {
return source;
}
public IOException unwrapRemoteException() {
if (getCause() instanceof RemoteException) {
return ((RemoteException)getCause()).unwrapRemoteException();
}
if (getCause() instanceof IOException) {
return (IOException)getCause();
}
return new IOException(getCause());
}
@Override
public String toString() {
String className = getCause().getClass().getName();
return className + " via " + getSource() + ":" + getLocalizedMessage();
}
/**
* Converts a RemoteProcedureException to an array of bytes.
* @param source the name of the external exception source
* @param t the "local" external exception (local)
* @return protobuf serialized version of RemoteProcedureException
*/
public static byte[] serialize(String source, Throwable t) {
return toProto(source, t).toByteArray();
}
/**
* Takes a series of bytes and tries to generate an RemoteProcedureException instance for it.
* @param bytes
* @return the ForeignExcpetion instance
* @throws InvalidProtocolBufferException if there was deserialization problem this is thrown.
*/
public static RemoteProcedureException deserialize(byte[] bytes)
throws InvalidProtocolBufferException {
return fromProto(ForeignExceptionMessage.parseFrom(bytes));
}
public ForeignExceptionMessage convert() {
return ForeignExceptionUtil.toProtoForeignException(getSource(), getCause());
}
public static ForeignExceptionMessage toProto(String source, Throwable t) {
return ForeignExceptionUtil.toProtoForeignException(source, t);
}
public static RemoteProcedureException fromProto(final ForeignExceptionMessage eem) {
return new RemoteProcedureException(eem.getSource(), ForeignExceptionUtil.toIOException(eem));
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.hbase.protobuf.generated.ProcedureProtos.ProcedureState;
/**
* Internal state of the ProcedureExecutor that describes the state of a "Root Procedure".
* A "Root Procedure" is a Procedure without parent, each subprocedure will be
* added to the "Root Procedure" stack (or rollback-stack).
*
* RootProcedureState is used and managed only by the ProcedureExecutor.
* Long rootProcId = getRootProcedureId(proc);
* rollbackStack.get(rootProcId).acquire(proc)
* rollbackStack.get(rootProcId).release(proc)
* ...
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
class RootProcedureState {
private static final Log LOG = LogFactory.getLog(RootProcedureState.class);
private enum State {
RUNNING, // The Procedure is running or ready to run
FAILED, // The Procedure failed, waiting for the rollback executing
ROLLINGBACK, // The Procedure failed and the execution was rolledback
}
private ArrayList<Procedure> subprocedures = null;
private State state = State.RUNNING;
private int running = 0;
public synchronized boolean isFailed() {
switch (state) {
case ROLLINGBACK:
case FAILED:
return true;
default:
break;
}
return false;
}
public synchronized boolean isRollingback() {
return state == State.ROLLINGBACK;
}
/**
* Called by the ProcedureExecutor to mark rollback execution
*/
protected synchronized boolean setRollback() {
if (running == 0 && state == State.FAILED) {
state = State.ROLLINGBACK;
return true;
}
return false;
}
/**
* Called by the ProcedureExecutor to mark rollback execution
*/
protected synchronized void unsetRollback() {
assert state == State.ROLLINGBACK;
state = State.FAILED;
}
protected synchronized List<Procedure> getSubprocedures() {
return subprocedures;
}
protected synchronized RemoteProcedureException getException() {
if (subprocedures != null) {
for (Procedure proc: subprocedures) {
if (proc.hasException()) {
return proc.getException();
}
}
}
return null;
}
/**
* Called by the ProcedureExecutor to mark the procedure step as running.
*/
protected synchronized boolean acquire(final Procedure proc) {
if (state != State.RUNNING) return false;
running++;
return true;
}
/**
* Called by the ProcedureExecutor to mark the procedure step as finished.
*/
protected synchronized void release(final Procedure proc) {
running--;
}
protected synchronized void abort() {
if (state == State.RUNNING) {
state = State.FAILED;
}
}
/**
* Called by the ProcedureExecutor after the procedure step is completed,
* to add the step to the rollback list (or procedure stack)
*/
protected synchronized void addRollbackStep(final Procedure proc) {
if (proc.isFailed()) {
state = State.FAILED;
}
if (subprocedures == null) {
subprocedures = new ArrayList<Procedure>();
}
proc.addStackIndex(subprocedures.size());
subprocedures.add(proc);
}
/**
* Called on store load by the ProcedureExecutor to load part of the stack.
*
* Each procedure has its own stack-positions. Which means we have to write
* to the store only the Procedure we executed, and nothing else.
* on load we recreate the full stack by aggregating each procedure stack-positions.
*/
protected synchronized void loadStack(final Procedure proc) {
int[] stackIndexes = proc.getStackIndexes();
if (stackIndexes != null) {
if (subprocedures == null) {
subprocedures = new ArrayList<Procedure>();
}
int diff = (1 + stackIndexes[stackIndexes.length - 1]) - subprocedures.size();
if (diff > 0) {
subprocedures.ensureCapacity(1 + stackIndexes[stackIndexes.length - 1]);
while (diff-- > 0) subprocedures.add(null);
}
for (int i = 0; i < stackIndexes.length; ++i) {
subprocedures.set(stackIndexes[i], proc);
}
}
if (proc.getState() == ProcedureState.ROLLEDBACK) {
state = State.ROLLINGBACK;
} else if (proc.isFailed()) {
state = State.FAILED;
}
}
/**
* Called on store load by the ProcedureExecutor to validate the procedure stack.
*/
protected synchronized boolean isValid() {
if (subprocedures != null) {
for (Procedure proc: subprocedures) {
if (proc == null) {
return false;
}
}
}
return true;
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.hbase.protobuf.generated.ProcedureProtos.SequentialProcedureData;
/**
* A SequentialProcedure describes one step in a procedure chain.
* -> Step 1 -> Step 2 -> Step 3
*
* The main difference from a base Procedure is that the execute() of a
* SequentialProcedure will be called only once, there will be no second
* execute() call once the child are finished. which means once the child
* of a SequentialProcedure are completed the SequentialProcedure is completed too.
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public abstract class SequentialProcedure<TEnvironment> extends Procedure<TEnvironment> {
private boolean executed = false;
@Override
protected Procedure[] doExecute(final TEnvironment env)
throws ProcedureYieldException {
updateTimestamp();
try {
Procedure[] children = !executed ? execute(env) : null;
executed = !executed;
return children;
} finally {
updateTimestamp();
}
}
@Override
protected void doRollback(final TEnvironment env) throws IOException {
updateTimestamp();
if (executed) {
try {
rollback(env);
executed = !executed;
} finally {
updateTimestamp();
}
}
}
@Override
protected void serializeStateData(final OutputStream stream) throws IOException {
SequentialProcedureData.Builder data = SequentialProcedureData.newBuilder();
data.setExecuted(executed);
data.build().writeDelimitedTo(stream);
}
@Override
protected void deserializeStateData(final InputStream stream) throws IOException {
SequentialProcedureData data = SequentialProcedureData.parseDelimitedFrom(stream);
executed = data.getExecuted();
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Arrays;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.hbase.protobuf.generated.ProcedureProtos.StateMachineProcedureData;
/**
* Procedure described by a series of steps.
*
* The procedure implementor must have an enum of 'states', describing
* the various step of the procedure.
* Once the procedure is running, the procedure-framework will call executeFromState()
* using the 'state' provided by the user. The first call to executeFromState()
* will be performed with 'state = null'. The implementor can jump between
* states using setNextState(MyStateEnum.ordinal()).
* The rollback will call rollbackState() for each state that was executed, in reverse order.
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public abstract class StateMachineProcedure<TEnvironment, TState>
extends Procedure<TEnvironment> {
private int stateCount = 0;
private int[] states = null;
protected enum Flow {
HAS_MORE_STATE,
NO_MORE_STATE,
}
/**
* called to perform a single step of the specified 'state' of the procedure
* @param state state to execute
* @return Flow.NO_MORE_STATE if the procedure is completed,
* Flow.HAS_MORE_STATE if there is another step.
*/
protected abstract Flow executeFromState(TEnvironment env, TState state)
throws ProcedureYieldException;
/**
* called to perform the rollback of the specified state
* @param state state to rollback
* @throws IOException temporary failure, the rollback will retry later
*/
protected abstract void rollbackState(TEnvironment env, TState state)
throws IOException;
/**
* Convert an ordinal (or state id) to an Enum (or more descriptive) state object.
* @param stateId the ordinal() of the state enum (or state id)
* @return the state enum object
*/
protected abstract TState getState(int stateId);
/**
* Convert the Enum (or more descriptive) state object to an ordinal (or state id).
* @param state the state enum object
* @return stateId the ordinal() of the state enum (or state id)
*/
protected abstract int getStateId(TState state);
/**
* Return the initial state object that will be used for the first call to executeFromState().
* @return the initial state enum object
*/
protected abstract TState getInitialState();
/**
* Set the next state for the procedure.
* @param state the state enum object
*/
protected void setNextState(final TState state) {
setNextState(getStateId(state));
}
@Override
protected Procedure[] execute(final TEnvironment env)
throws ProcedureYieldException {
updateTimestamp();
try {
TState state = stateCount > 0 ? getState(states[stateCount-1]) : getInitialState();
if (stateCount == 0) {
setNextState(getStateId(state));
}
if (executeFromState(env, state) == Flow.NO_MORE_STATE) {
// completed
return null;
}
return (isWaiting() || isFailed()) ? null : new Procedure[] {this};
} finally {
updateTimestamp();
}
}
@Override
protected void rollback(final TEnvironment env) throws IOException {
try {
updateTimestamp();
rollbackState(env, stateCount > 0 ? getState(states[stateCount-1]) : getInitialState());
stateCount--;
} finally {
updateTimestamp();
}
}
/**
* Set the next state for the procedure.
* @param stateId the ordinal() of the state enum (or state id)
*/
private void setNextState(final int stateId) {
if (states == null || states.length == stateCount) {
int newCapacity = stateCount + 8;
if (states != null) {
states = Arrays.copyOf(states, newCapacity);
} else {
states = new int[newCapacity];
}
}
states[stateCount++] = stateId;
}
@Override
protected void serializeStateData(final OutputStream stream) throws IOException {
StateMachineProcedureData.Builder data = StateMachineProcedureData.newBuilder();
for (int i = 0; i < stateCount; ++i) {
data.addState(states[i]);
}
data.build().writeDelimitedTo(stream);
}
@Override
protected void deserializeStateData(final InputStream stream) throws IOException {
StateMachineProcedureData data = StateMachineProcedureData.parseDelimitedFrom(stream);
stateCount = data.getStateCount();
if (stateCount > 0) {
states = new int[stateCount];
for (int i = 0; i < stateCount; ++i) {
states[i] = data.getState(i);
}
} else {
states = null;
}
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
@InterfaceAudience.Public
@InterfaceStability.Evolving
public abstract class TwoPhaseProcedure<TEnvironment> extends Procedure<TEnvironment> {
// TODO (e.g. used by ACLs/VisibilityTags updates)
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2.store;
import java.io.IOException;
import java.util.Iterator;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.hbase.procedure2.Procedure;
/**
* The ProcedureStore is used by the executor to persist the state of each procedure execution.
* This allows to resume the execution of pending/in-progress procedures in case
* of machine failure or service shutdown.
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public interface ProcedureStore {
/**
* Store listener interface.
* The main process should register a listener and respond to the store events.
*/
public interface ProcedureStoreListener {
/**
* triggered when the store is not able to write out data.
* the main process should abort.
*/
void abortProcess();
}
/**
* Add the listener to the notification list.
* @param listener The AssignmentListener to register
*/
void registerListener(ProcedureStoreListener listener);
/**
* Remove the listener from the notification list.
* @param listener The AssignmentListener to unregister
* @return true if the listner was in the list and it was removed, otherwise false.
*/
boolean unregisterListener(ProcedureStoreListener listener);
/**
* Start/Open the procedure store
* @param numThreads
*/
void start(int numThreads) throws IOException;
/**
* Stop/Close the procedure store
* @param abort true if the stop is an abort
*/
void stop(boolean abort);
/**
* @return true if the store is running, otherwise false.
*/
boolean isRunning();
/**
* @return the number of threads/slots passed to start()
*/
int getNumThreads();
/**
* Acquire the lease for the procedure store.
*/
void recoverLease() throws IOException;
/**
* Load the Procedures in the store.
* @return the set of procedures present in the store
*/
Iterator<Procedure> load() throws IOException;
/**
* When a procedure is submitted to the executor insert(proc, null) will be called.
* 'proc' has a 'RUNNABLE' state and the initial information required to start up.
*
* When a procedure is executed and it returns children insert(proc, subprocs) will be called.
* 'proc' has a 'WAITING' state and an update state.
* 'subprocs' are the children in 'RUNNABLE' state with the initial information.
*
* @param proc the procedure to serialize and write to the store.
* @param subprocs the newly created child of the proc.
*/
void insert(Procedure proc, Procedure[] subprocs);
/**
* The specified procedure was executed,
* and the new state should be written to the store.
* @param proc the procedure to serialize and write to the store.
*/
void update(Procedure proc);
/**
* The specified procId was removed from the executor,
* due to completion, abort or failure.
* The store implementor should remove all the information about the specified procId.
* @param procId the ID of the procedure to remove.
*/
void delete(long procId);
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2.store;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Iterator;
import java.util.Map;
import java.util.TreeMap;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.hbase.procedure2.Procedure;
import org.apache.hadoop.hbase.protobuf.generated.ProcedureProtos;
/**
* Keeps track of live procedures.
*
* It can be used by the ProcedureStore to identify which procedures are already
* deleted/completed to avoid the deserialization step on restart.
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class ProcedureStoreTracker {
private final TreeMap<Long, BitSetNode> map = new TreeMap<Long, BitSetNode>();
private boolean keepDeletes = false;
private boolean partial = false;
public enum DeleteState { YES, NO, MAYBE }
public static class BitSetNode {
private final static long WORD_MASK = 0xffffffffffffffffL;
private final static int ADDRESS_BITS_PER_WORD = 6;
private final static int BITS_PER_WORD = 1 << ADDRESS_BITS_PER_WORD;
private final static int MAX_NODE_SIZE = 4 << ADDRESS_BITS_PER_WORD;
private long[] updated;
private long[] deleted;
private long start;
public void dump() {
System.out.printf("%06d:%06d min=%d max=%d%n", getStart(), getEnd(),
getMinProcId(), getMaxProcId());
System.out.println("Update:");
for (int i = 0; i < updated.length; ++i) {
for (int j = 0; j < BITS_PER_WORD; ++j) {
System.out.print((updated[i] & (1L << j)) != 0 ? "1" : "0");
}
System.out.println(" " + i);
}
System.out.println();
System.out.println("Delete:");
for (int i = 0; i < deleted.length; ++i) {
for (int j = 0; j < BITS_PER_WORD; ++j) {
System.out.print((deleted[i] & (1L << j)) != 0 ? "1" : "0");
}
System.out.println(" " + i);
}
System.out.println();
}
public BitSetNode(final long procId, final boolean partial) {
start = alignDown(procId);
int count = 2;
updated = new long[count];
deleted = new long[count];
for (int i = 0; i < count; ++i) {
updated[i] = 0;
deleted[i] = partial ? 0 : WORD_MASK;
}
updateState(procId, false);
}
protected BitSetNode(final long start, final long[] updated, final long[] deleted) {
this.start = start;
this.updated = updated;
this.deleted = deleted;
}
public void update(final long procId) {
updateState(procId, false);
}
public void delete(final long procId) {
updateState(procId, true);
}
public Long getStart() {
return start;
}
public Long getEnd() {
return start + (updated.length << ADDRESS_BITS_PER_WORD) - 1;
}
public boolean contains(final long procId) {
return start <= procId && procId <= getEnd();
}
public DeleteState isDeleted(final long procId) {
int bitmapIndex = getBitmapIndex(procId);
int wordIndex = bitmapIndex >> ADDRESS_BITS_PER_WORD;
if (wordIndex >= deleted.length) {
return DeleteState.MAYBE;
}
return (deleted[wordIndex] & (1L << bitmapIndex)) != 0 ? DeleteState.YES : DeleteState.NO;
}
private boolean isUpdated(final long procId) {
int bitmapIndex = getBitmapIndex(procId);
int wordIndex = bitmapIndex >> ADDRESS_BITS_PER_WORD;
if (wordIndex >= updated.length) {
return false;
}
return (updated[wordIndex] & (1L << bitmapIndex)) != 0;
}
public boolean isUpdated() {
// TODO: cache the value
for (int i = 0; i < updated.length; ++i) {
long deleteMask = ~deleted[i];
if ((updated[i] & deleteMask) != (WORD_MASK & deleteMask)) {
return false;
}
}
return true;
}
public boolean isEmpty() {
// TODO: cache the value
for (int i = 0; i < deleted.length; ++i) {
if (deleted[i] != WORD_MASK) {
return false;
}
}
return true;
}
public void resetUpdates() {
for (int i = 0; i < updated.length; ++i) {
updated[i] = 0;
}
}
public void undeleteAll() {
for (int i = 0; i < updated.length; ++i) {
deleted[i] = 0;
}
}
public ProcedureProtos.ProcedureStoreTracker.TrackerNode convert() {
ProcedureProtos.ProcedureStoreTracker.TrackerNode.Builder builder =
ProcedureProtos.ProcedureStoreTracker.TrackerNode.newBuilder();
builder.setStartId(start);
for (int i = 0; i < updated.length; ++i) {
builder.addUpdated(updated[i]);
builder.addDeleted(deleted[i]);
}
return builder.build();
}
public static BitSetNode convert(ProcedureProtos.ProcedureStoreTracker.TrackerNode data) {
long start = data.getStartId();
int size = data.getUpdatedCount();
long[] updated = new long[size];
long[] deleted = new long[size];
for (int i = 0; i < size; ++i) {
updated[i] = data.getUpdated(i);
deleted[i] = data.getDeleted(i);
}
return new BitSetNode(start, updated, deleted);
}
// ========================================================================
// Grow/Merge Helpers
// ========================================================================
public boolean canGrow(final long procId) {
return (procId - start) < MAX_NODE_SIZE;
}
public boolean canMerge(final BitSetNode rightNode) {
return (start + rightNode.getEnd()) < MAX_NODE_SIZE;
}
public void grow(final long procId) {
int delta, offset;
if (procId < start) {
// add to head
long newStart = alignDown(procId);
delta = (int)(start - newStart) >> ADDRESS_BITS_PER_WORD;
offset = delta;
} else {
// Add to tail
long newEnd = alignUp(procId + 1);
delta = (int)(newEnd - getEnd()) >> ADDRESS_BITS_PER_WORD;
offset = 0;
}
long[] newBitmap;
int oldSize = updated.length;
newBitmap = new long[oldSize + delta];
System.arraycopy(updated, 0, newBitmap, offset, oldSize);
updated = newBitmap;
newBitmap = new long[deleted.length + delta];
System.arraycopy(deleted, 0, newBitmap, offset, oldSize);
deleted = newBitmap;
for (int i = 0; i < delta; ++i) {
updated[oldSize + i] = 0;
deleted[oldSize + i] = WORD_MASK;
}
}
public void merge(final BitSetNode rightNode) {
int delta = (int)(rightNode.getEnd() - getEnd()) >> ADDRESS_BITS_PER_WORD;
long[] newBitmap;
int oldSize = updated.length;
int newSize = (delta - rightNode.updated.length);
int offset = oldSize + newSize;
newBitmap = new long[oldSize + delta];
System.arraycopy(updated, 0, newBitmap, 0, oldSize);
System.arraycopy(rightNode.updated, 0, newBitmap, offset, rightNode.updated.length);
updated = newBitmap;
newBitmap = new long[oldSize + delta];
System.arraycopy(deleted, 0, newBitmap, 0, oldSize);
System.arraycopy(rightNode.deleted, 0, newBitmap, offset, rightNode.deleted.length);
deleted = newBitmap;
for (int i = 0; i < newSize; ++i) {
updated[offset + i] = 0;
deleted[offset + i] = WORD_MASK;
}
}
// ========================================================================
// Min/Max Helpers
// ========================================================================
public long getMinProcId() {
long minProcId = start;
for (int i = 0; i < deleted.length; ++i) {
if (deleted[i] == 0) {
return(minProcId);
}
if (deleted[i] != WORD_MASK) {
for (int j = 0; j < BITS_PER_WORD; ++j) {
if ((deleted[i] & (1L << j)) != 0) {
return minProcId + j;
}
}
}
minProcId += BITS_PER_WORD;
}
return minProcId;
}
public long getMaxProcId() {
long maxProcId = getEnd();
for (int i = deleted.length - 1; i >= 0; --i) {
if (deleted[i] == 0) {
return maxProcId;
}
if (deleted[i] != WORD_MASK) {
for (int j = BITS_PER_WORD - 1; j >= 0; --j) {
if ((deleted[i] & (1L << j)) == 0) {
return maxProcId - (BITS_PER_WORD - 1 - j);
}
}
}
maxProcId -= BITS_PER_WORD;
}
return maxProcId;
}
// ========================================================================
// Bitmap Helpers
// ========================================================================
private int getBitmapIndex(final long procId) {
return (int)(procId - start);
}
private void updateState(final long procId, final boolean isDeleted) {
int bitmapIndex = getBitmapIndex(procId);
int wordIndex = bitmapIndex >> ADDRESS_BITS_PER_WORD;
long value = (1L << bitmapIndex);
if (isDeleted) {
updated[wordIndex] |= value;
deleted[wordIndex] |= value;
} else {
updated[wordIndex] |= value;
deleted[wordIndex] &= ~value;
}
}
// ========================================================================
// Helpers
// ========================================================================
private static long alignUp(final long x) {
return (x + (BITS_PER_WORD - 1)) & -BITS_PER_WORD;
}
private static long alignDown(final long x) {
return x & -BITS_PER_WORD;
}
}
public void insert(final Procedure proc, final Procedure[] subprocs) {
insert(proc.getProcId());
if (subprocs != null) {
for (int i = 0; i < subprocs.length; ++i) {
insert(subprocs[i].getProcId());
}
}
}
public void update(final Procedure proc) {
update(proc.getProcId());
}
public void insert(long procId) {
BitSetNode node = getOrCreateNode(procId);
node.update(procId);
}
public void update(long procId) {
Map.Entry<Long, BitSetNode> entry = map.floorEntry(procId);
assert entry != null : "expected node to update procId=" + procId;
BitSetNode node = entry.getValue();
assert node.contains(procId);
node.update(procId);
}
public void delete(long procId) {
Map.Entry<Long, BitSetNode> entry = map.floorEntry(procId);
assert entry != null : "expected node to delete procId=" + procId;
BitSetNode node = entry.getValue();
assert node.contains(procId) : "expected procId in the node";
node.delete(procId);
if (!keepDeletes && node.isEmpty()) {
// TODO: RESET if (map.size() == 1)
map.remove(entry.getKey());
}
}
@InterfaceAudience.Private
public void setDeleted(final long procId, final boolean isDeleted) {
BitSetNode node = getOrCreateNode(procId);
node.updateState(procId, isDeleted);
}
public void clear() {
this.map.clear();
}
public DeleteState isDeleted(long procId) {
Map.Entry<Long, BitSetNode> entry = map.floorEntry(procId);
if (entry != null) {
BitSetNode node = entry.getValue();
DeleteState state = node.isDeleted(procId);
return partial && !node.isUpdated(procId) ? DeleteState.MAYBE : state;
}
return partial ? DeleteState.MAYBE : DeleteState.YES;
}
public long getMinProcId() {
// TODO: Cache?
Map.Entry<Long, BitSetNode> entry = map.firstEntry();
return entry == null ? 0 : entry.getValue().getMinProcId();
}
public void setKeepDeletes(boolean keepDeletes) {
this.keepDeletes = keepDeletes;
if (!keepDeletes) {
Iterator<Map.Entry<Long, BitSetNode>> it = map.entrySet().iterator();
while (it.hasNext()) {
Map.Entry<Long, BitSetNode> entry = it.next();
if (entry.getValue().isEmpty()) {
it.remove();
}
}
}
}
public void setPartialFlag(boolean isPartial) {
this.partial = isPartial;
}
public boolean isEmpty() {
for (Map.Entry<Long, BitSetNode> entry : map.entrySet()) {
if (entry.getValue().isEmpty() == false) {
return false;
}
}
return true;
}
public boolean isUpdated() {
for (Map.Entry<Long, BitSetNode> entry : map.entrySet()) {
if (entry.getValue().isUpdated() == false) {
return false;
}
}
return true;
}
public void resetUpdates() {
for (Map.Entry<Long, BitSetNode> entry : map.entrySet()) {
entry.getValue().resetUpdates();
}
}
public void undeleteAll() {
for (Map.Entry<Long, BitSetNode> entry : map.entrySet()) {
entry.getValue().undeleteAll();
}
}
private BitSetNode getOrCreateNode(final long procId) {
// can procId fit in the left node?
BitSetNode leftNode = null;
boolean leftCanGrow = false;
Map.Entry<Long, BitSetNode> leftEntry = map.floorEntry(procId);
if (leftEntry != null) {
leftNode = leftEntry.getValue();
if (leftNode.contains(procId)) {
return leftNode;
}
leftCanGrow = leftNode.canGrow(procId);
}
BitSetNode rightNode = null;
boolean rightCanGrow = false;
Map.Entry<Long, BitSetNode> rightEntry = map.ceilingEntry(procId);
if (rightEntry != null) {
rightNode = rightEntry.getValue();
rightCanGrow = rightNode.canGrow(procId);
if (leftNode != null) {
if (leftNode.canMerge(rightNode)) {
// merge left and right node
return mergeNodes(leftNode, rightNode);
}
if (leftCanGrow && rightCanGrow) {
if ((procId - leftNode.getEnd()) <= (rightNode.getStart() - procId)) {
// grow the left node
return growNode(leftNode, procId);
}
// grow the right node
return growNode(rightNode, procId);
}
}
}
// grow the left node
if (leftCanGrow) {
return growNode(leftNode, procId);
}
// grow the right node
if (rightCanGrow) {
return growNode(rightNode, procId);
}
// add new node
BitSetNode node = new BitSetNode(procId, partial);
map.put(node.getStart(), node);
return node;
}
private BitSetNode growNode(BitSetNode node, long procId) {
map.remove(node.getStart());
node.grow(procId);
map.put(node.getStart(), node);
return node;
}
private BitSetNode mergeNodes(BitSetNode leftNode, BitSetNode rightNode) {
leftNode.merge(rightNode);
map.remove(rightNode.getStart());
return leftNode;
}
public void dump() {
System.out.println("map " + map.size());
for (Map.Entry<Long, BitSetNode> entry : map.entrySet()) {
entry.getValue().dump();
}
}
public void writeTo(final OutputStream stream) throws IOException {
ProcedureProtos.ProcedureStoreTracker.Builder builder =
ProcedureProtos.ProcedureStoreTracker.newBuilder();
for (Map.Entry<Long, BitSetNode> entry : map.entrySet()) {
builder.addNode(entry.getValue().convert());
}
builder.build().writeDelimitedTo(stream);
}
public void readFrom(final InputStream stream) throws IOException {
ProcedureProtos.ProcedureStoreTracker data =
ProcedureProtos.ProcedureStoreTracker.parseDelimitedFrom(stream);
map.clear();
for (ProcedureProtos.ProcedureStoreTracker.TrackerNode protoNode: data.getNodeList()) {
BitSetNode node = BitSetNode.convert(protoNode);
map.put(node.getStart(), node);
}
}
}

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hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/store/wal/CorruptedWALProcedureStoreException.java Normal file
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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2.store.wal;
import org.apache.hadoop.hbase.HBaseIOException;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
/**
* Thrown when a procedure WAL is corrupted
*/
@InterfaceAudience.Public
@InterfaceStability.Stable
public class CorruptedWALProcedureStoreException extends HBaseIOException {
/** default constructor */
public CorruptedWALProcedureStoreException() {
super();
}
/**
* Constructor
* @param s message
*/
public CorruptedWALProcedureStoreException(String s) {
super(s);
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2.store.wal;
import java.io.IOException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.procedure2.store.ProcedureStoreTracker;
import org.apache.hadoop.hbase.protobuf.generated.ProcedureProtos.ProcedureWALHeader;
import org.apache.hadoop.hbase.protobuf.generated.ProcedureProtos.ProcedureWALTrailer;
/**
* Describes a WAL File
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class ProcedureWALFile implements Comparable<ProcedureWALFile> {
private static final Log LOG = LogFactory.getLog(ProcedureWALFile.class);
private ProcedureWALHeader header;
private FSDataInputStream stream;
private FileStatus logStatus;
private FileSystem fs;
private Path logFile;
private long startPos;
public ProcedureWALFile(final FileSystem fs, final FileStatus logStatus) {
this.fs = fs;
this.logStatus = logStatus;
this.logFile = logStatus.getPath();
}
public ProcedureWALFile(FileSystem fs, Path logFile, ProcedureWALHeader header, long startPos) {
this.fs = fs;
this.logFile = logFile;
this.header = header;
this.startPos = startPos;
}
public void open() throws IOException {
if (stream == null) {
stream = fs.open(logFile);
}
if (header == null) {
header = ProcedureWALFormat.readHeader(stream);
startPos = stream.getPos();
} else {
stream.seek(startPos);
}
}
public ProcedureWALTrailer readTrailer() throws IOException {
try {
return ProcedureWALFormat.readTrailer(stream, startPos, logStatus.getLen());
} finally {
stream.seek(startPos);
}
}
public void readTracker(ProcedureStoreTracker tracker) throws IOException {
ProcedureWALTrailer trailer = readTrailer();
try {
stream.seek(trailer.getTrackerPos());
tracker.readFrom(stream);
} finally {
stream.seek(startPos);
}
}
public void close() {
if (stream == null) return;
try {
stream.close();
} catch (IOException e) {
LOG.warn("unable to close the wal file: " + logFile, e);
} finally {
stream = null;
}
}
public FSDataInputStream getStream() {
return stream;
}
public ProcedureWALHeader getHeader() {
return header;
}
public boolean isCompacted() {
return header.getType() == ProcedureWALFormat.LOG_TYPE_COMPACTED;
}
public long getLogId() {
return header.getLogId();
}
public long getSize() {
return logStatus.getLen();
}
public void removeFile() throws IOException {
close();
fs.delete(logFile, false);
}
@Override
public int compareTo(final ProcedureWALFile other) {
long diff = header.getLogId() - other.header.getLogId();
return (diff < 0) ? -1 : (diff > 0) ? 1 : 0;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof ProcedureWALFile)) return false;
return compareTo((ProcedureWALFile)o) == 0;
}
@Override
public int hashCode() {
return logFile.hashCode();
}
@Override
public String toString() {
return logFile.toString();
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2.store.wal;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Iterator;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.hbase.io.util.StreamUtils;
import org.apache.hadoop.hbase.procedure2.Procedure;
import org.apache.hadoop.hbase.procedure2.store.ProcedureStoreTracker;
import org.apache.hadoop.hbase.procedure2.util.ByteSlot;
import org.apache.hadoop.hbase.protobuf.generated.ProcedureProtos.ProcedureWALEntry;
import org.apache.hadoop.hbase.protobuf.generated.ProcedureProtos.ProcedureWALHeader;
import org.apache.hadoop.hbase.protobuf.generated.ProcedureProtos.ProcedureWALTrailer;
import com.google.protobuf.InvalidProtocolBufferException;
/**
* Helper class that contains the WAL serialization utils.
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public final class ProcedureWALFormat {
static final byte LOG_TYPE_STREAM = 0;
static final byte LOG_TYPE_COMPACTED = 1;
static final byte LOG_TYPE_MAX_VALID = 1;
static final byte HEADER_VERSION = 1;
static final byte TRAILER_VERSION = 1;
static final long HEADER_MAGIC = 0x31764c4157637250L;
static final long TRAILER_MAGIC = 0x50726357414c7631L;
@InterfaceAudience.Private
public static class InvalidWALDataException extends IOException {
public InvalidWALDataException(String s) {
super(s);
}
public InvalidWALDataException(Throwable t) {
super(t);
}
}
interface Loader {
void removeLog(ProcedureWALFile log);
void markCorruptedWAL(ProcedureWALFile log, IOException e);
}
private ProcedureWALFormat() {}
public static Iterator<Procedure> load(final Iterator<ProcedureWALFile> logs,
final ProcedureStoreTracker tracker, final Loader loader) throws IOException {
ProcedureWALFormatReader reader = new ProcedureWALFormatReader(tracker);
tracker.setKeepDeletes(true);
try {
while (logs.hasNext()) {
ProcedureWALFile log = logs.next();
log.open();
try {
reader.read(log, loader);
} finally {
log.close();
}
}
// The tracker is now updated with all the procedures read from the logs
tracker.setPartialFlag(false);
tracker.resetUpdates();
} finally {
tracker.setKeepDeletes(false);
}
// TODO: Write compacted version?
return reader.getProcedures();
}
public static void writeHeader(OutputStream stream, ProcedureWALHeader header)
throws IOException {
header.writeDelimitedTo(stream);
}
/*
* +-----------------+
* | END OF WAL DATA | <---+
* +-----------------+ |
* | | |
* | Tracker | |
* | | |
* +-----------------+ |
* | version | |
* +-----------------+ |
* | TRAILER_MAGIC | |
* +-----------------+ |
* | offset |-----+
* +-----------------+
*/
public static void writeTrailer(FSDataOutputStream stream, ProcedureStoreTracker tracker)
throws IOException {
long offset = stream.getPos();
// Write EOF Entry
ProcedureWALEntry.newBuilder()
.setType(ProcedureWALEntry.Type.EOF)
.build().writeDelimitedTo(stream);
// Write Tracker
tracker.writeTo(stream);
stream.write(TRAILER_VERSION);
StreamUtils.writeLong(stream, TRAILER_MAGIC);
StreamUtils.writeLong(stream, offset);
}
public static ProcedureWALHeader readHeader(InputStream stream)
throws IOException {
ProcedureWALHeader header;
try {
header = ProcedureWALHeader.parseDelimitedFrom(stream);
} catch (InvalidProtocolBufferException e) {
throw new InvalidWALDataException(e);
}
if (header == null) {
throw new InvalidWALDataException("No data available to read the Header");
}
if (header.getVersion() < 0 || header.getVersion() != HEADER_VERSION) {
throw new InvalidWALDataException("Invalid Header version. got " + header.getVersion() +
" expected " + HEADER_VERSION);
}
if (header.getType() < 0 || header.getType() > LOG_TYPE_MAX_VALID) {
throw new InvalidWALDataException("Invalid header type. got " + header.getType());
}
return header;
}
public static ProcedureWALTrailer readTrailer(FSDataInputStream stream, long startPos, long size)
throws IOException {
long trailerPos = size - 17; // Beginning of the Trailer Jump
if (trailerPos < startPos) {
throw new InvalidWALDataException("Missing trailer: size=" + size + " startPos=" + startPos);
}
stream.seek(trailerPos);
int version = stream.read();
if (version != TRAILER_VERSION) {
throw new InvalidWALDataException("Invalid Trailer version. got " + version +
" expected " + TRAILER_VERSION);
}
long magic = StreamUtils.readLong(stream);
if (magic != TRAILER_MAGIC) {
throw new InvalidWALDataException("Invalid Trailer magic. got " + magic +
" expected " + TRAILER_MAGIC);
}
long trailerOffset = StreamUtils.readLong(stream);
stream.seek(trailerOffset);
ProcedureWALEntry entry = readEntry(stream);
if (entry.getType() != ProcedureWALEntry.Type.EOF) {
throw new InvalidWALDataException("Invalid Trailer begin");
}
ProcedureWALTrailer trailer = ProcedureWALTrailer.newBuilder()
.setVersion(version)
.setTrackerPos(stream.getPos())
.build();
return trailer;
}
public static ProcedureWALEntry readEntry(InputStream stream) throws IOException {
return ProcedureWALEntry.parseDelimitedFrom(stream);
}
public static void writeEntry(ByteSlot slot, ProcedureWALEntry.Type type,
Procedure proc, Procedure[] subprocs) throws IOException {
ProcedureWALEntry.Builder builder = ProcedureWALEntry.newBuilder();
builder.setType(type);
builder.addProcedure(Procedure.convert(proc));
if (subprocs != null) {
for (int i = 0; i < subprocs.length; ++i) {
builder.addProcedure(Procedure.convert(subprocs[i]));
}
}
builder.build().writeDelimitedTo(slot);
}
public static void writeInsert(ByteSlot slot, Procedure proc)
throws IOException {
writeEntry(slot, ProcedureWALEntry.Type.INIT, proc, null);
}
public static void writeInsert(ByteSlot slot, Procedure proc, Procedure[] subprocs)
throws IOException {
writeEntry(slot, ProcedureWALEntry.Type.INSERT, proc, subprocs);
}
public static void writeUpdate(ByteSlot slot, Procedure proc)
throws IOException {
writeEntry(slot, ProcedureWALEntry.Type.UPDATE, proc, null);
}
public static void writeDelete(ByteSlot slot, long procId)
throws IOException {
ProcedureWALEntry.Builder builder = ProcedureWALEntry.newBuilder();
builder.setType(ProcedureWALEntry.Type.DELETE);
builder.setProcId(procId);
builder.build().writeDelimitedTo(slot);
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2.store.wal;
import java.io.IOException;
import java.util.Iterator;
import java.util.Map;
import java.util.HashMap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.hbase.procedure2.Procedure;
import org.apache.hadoop.hbase.procedure2.store.ProcedureStoreTracker;
import org.apache.hadoop.hbase.protobuf.generated.ProcedureProtos;
import org.apache.hadoop.hbase.protobuf.generated.ProcedureProtos.ProcedureWALEntry;
/**
* Helper class that loads the procedures stored in a WAL
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class ProcedureWALFormatReader {
private static final Log LOG = LogFactory.getLog(ProcedureWALFormatReader.class);
private final ProcedureStoreTracker tracker;
//private final long compactionLogId;
private final Map<Long, Procedure> procedures = new HashMap<Long, Procedure>();
private final Map<Long, ProcedureProtos.Procedure> localProcedures =
new HashMap<Long, ProcedureProtos.Procedure>();
private long maxProcId = 0;
public ProcedureWALFormatReader(final ProcedureStoreTracker tracker) {
this.tracker = tracker;
}
public void read(ProcedureWALFile log, ProcedureWALFormat.Loader loader) throws IOException {
FSDataInputStream stream = log.getStream();
try {
boolean hasMore = true;
while (hasMore) {
ProcedureWALEntry entry = ProcedureWALFormat.readEntry(stream);
if (entry == null) {
LOG.warn("nothing left to decode. exiting with missing EOF");
hasMore = false;
break;
}
switch (entry.getType()) {
case INIT:
readInitEntry(entry);
break;
case INSERT:
readInsertEntry(entry);
break;
case UPDATE:
case COMPACT:
readUpdateEntry(entry);
break;
case DELETE:
readDeleteEntry(entry);
break;
case EOF:
hasMore = false;
break;
default:
throw new CorruptedWALProcedureStoreException("Invalid entry: " + entry);
}
}
} catch (IOException e) {
LOG.error("got an exception while reading the procedure WAL: " + log, e);
loader.markCorruptedWAL(log, e);
}
if (localProcedures.isEmpty()) {
LOG.info("No active entry found in state log " + log + ". removing it");
loader.removeLog(log);
} else {
Iterator<Map.Entry<Long, ProcedureProtos.Procedure>> itd =
localProcedures.entrySet().iterator();
while (itd.hasNext()) {
Map.Entry<Long, ProcedureProtos.Procedure> entry = itd.next();
itd.remove();
// Deserialize the procedure
Procedure proc = Procedure.convert(entry.getValue());
procedures.put(entry.getKey(), proc);
}
// TODO: Some procedure may be already runnables (see readInitEntry())
// (we can also check the "update map" in the log trackers)
}
}
public Iterator<Procedure> getProcedures() {
return procedures.values().iterator();
}
private void loadEntries(final ProcedureWALEntry entry) {
for (ProcedureProtos.Procedure proc: entry.getProcedureList()) {
maxProcId = Math.max(maxProcId, proc.getProcId());
if (isRequired(proc.getProcId())) {
if (LOG.isTraceEnabled()) {
LOG.trace("read " + entry.getType() + " entry " + proc.getProcId());
}
localProcedures.put(proc.getProcId(), proc);
tracker.setDeleted(proc.getProcId(), false);
}
}
}
private void readInitEntry(final ProcedureWALEntry entry)
throws IOException {
assert entry.getProcedureCount() == 1 : "Expected only one procedure";
// TODO: Make it runnable, before reading other files
loadEntries(entry);
}
private void readInsertEntry(final ProcedureWALEntry entry) throws IOException {
assert entry.getProcedureCount() >= 1 : "Expected one or more procedures";
loadEntries(entry);
}
private void readUpdateEntry(final ProcedureWALEntry entry) throws IOException {
assert entry.getProcedureCount() == 1 : "Expected only one procedure";
loadEntries(entry);
}
private void readDeleteEntry(final ProcedureWALEntry entry) throws IOException {
assert entry.getProcedureCount() == 0 : "Expected no procedures";
assert entry.hasProcId() : "expected ProcID";
if (LOG.isTraceEnabled()) {
LOG.trace("read delete entry " + entry.getProcId());
}
maxProcId = Math.max(maxProcId, entry.getProcId());
localProcedures.remove(entry.getProcId());
tracker.setDeleted(entry.getProcId(), true);
}
private boolean isDeleted(final long procId) {
return tracker.isDeleted(procId) == ProcedureStoreTracker.DeleteState.YES;
}
private boolean isRequired(final long procId) {
return !isDeleted(procId) && !procedures.containsKey(procId);
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2.store.wal;
import java.io.IOException;
import java.io.FileNotFoundException;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.ReentrantLock;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.TimeUnit;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileAlreadyExistsException;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathFilter;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.hbase.procedure2.Procedure;
import org.apache.hadoop.hbase.procedure2.store.ProcedureStore;
import org.apache.hadoop.hbase.procedure2.store.ProcedureStoreTracker;
import org.apache.hadoop.hbase.procedure2.util.ByteSlot;
import org.apache.hadoop.hbase.procedure2.util.StringUtils;
import org.apache.hadoop.hbase.protobuf.generated.ProcedureProtos.ProcedureWALHeader;
/**
* WAL implementation of the ProcedureStore.
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class WALProcedureStore implements ProcedureStore {
private static final Log LOG = LogFactory.getLog(WALProcedureStore.class);
public interface LeaseRecovery {
void recoverFileLease(FileSystem fs, Path path) throws IOException;
}
private static final int MAX_RETRIES_BEFORE_ABORT = 3;
private static final String SYNC_WAIT_MSEC_CONF_KEY = "hbase.procedure.store.wal.sync.wait.msec";
private static final int DEFAULT_SYNC_WAIT_MSEC = 100;
private final CopyOnWriteArrayList<ProcedureStoreListener> listeners =
new CopyOnWriteArrayList<ProcedureStoreListener>();
private final LinkedList<ProcedureWALFile> logs = new LinkedList<ProcedureWALFile>();
private final ProcedureStoreTracker storeTracker = new ProcedureStoreTracker();
private final AtomicBoolean running = new AtomicBoolean(false);
private final ReentrantLock lock = new ReentrantLock();
private final Condition waitCond = lock.newCondition();
private final Condition slotCond = lock.newCondition();
private final Condition syncCond = lock.newCondition();
private final LeaseRecovery leaseRecovery;
private final Configuration conf;
private final FileSystem fs;
private final Path logDir;
private AtomicBoolean inSync = new AtomicBoolean(false);
private ArrayBlockingQueue<ByteSlot> slotsCache = null;
private Set<ProcedureWALFile> corruptedLogs = null;
private FSDataOutputStream stream = null;
private long totalSynced = 0;
private long flushLogId = 0;
private int slotIndex = 0;
private Thread syncThread;
private ByteSlot[] slots;
private int syncWaitMsec;
public WALProcedureStore(final Configuration conf, final FileSystem fs, final Path logDir,
final LeaseRecovery leaseRecovery) {
this.fs = fs;
this.conf = conf;
this.logDir = logDir;
this.leaseRecovery = leaseRecovery;
}
@Override
public void start(int numSlots) throws IOException {
if (running.getAndSet(true)) {
return;
}
// Init buffer slots
slots = new ByteSlot[numSlots];
slotsCache = new ArrayBlockingQueue(numSlots, true);
while (slotsCache.remainingCapacity() > 0) {
slotsCache.offer(new ByteSlot());
}
// Tunings
syncWaitMsec = conf.getInt(SYNC_WAIT_MSEC_CONF_KEY, DEFAULT_SYNC_WAIT_MSEC);
// Init sync thread
syncThread = new Thread("WALProcedureStoreSyncThread") {
@Override
public void run() {
while (running.get()) {
try {
syncLoop();
} catch (IOException e) {
LOG.error("got an exception from the sync-loop", e);
sendAbortProcessSignal();
}
}
}
};
syncThread.start();
}
@Override
public void stop(boolean abort) {
if (!running.getAndSet(false)) {
return;
}
LOG.info("Stopping the WAL Procedure Store");
if (lock.tryLock()) {
try {
waitCond.signalAll();
} finally {
lock.unlock();
}
}
if (!abort) {
try {
syncThread.join();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
// Close the writer
closeStream();
// Close the old logs
// they should be already closed, this is just in case the load fails
// and we call start() and then stop()
for (ProcedureWALFile log: logs) {
log.close();
}
logs.clear();
}
@Override
public boolean isRunning() {
return running.get();
}
@Override
public int getNumThreads() {
return slots == null ? 0 : slots.length;
}
public ProcedureStoreTracker getStoreTracker() {
return storeTracker;
}
@Override
public void registerListener(ProcedureStoreListener listener) {
this.listeners.add(listener);
}
@Override
public boolean unregisterListener(ProcedureStoreListener listener) {
return this.listeners.remove(listener);
}
@Override
public void recoverLease() throws IOException {
LOG.info("Starting WAL Procedure Store lease recovery");
FileStatus[] oldLogs = getLogFiles();
while (running.get()) {
// Get Log-MaxID and recover lease on old logs
flushLogId = initOldLogs(oldLogs) + 1;
// Create new state-log
if (!rollWriter(flushLogId)) {
// someone else has already created this log
LOG.debug("someone else has already created log " + flushLogId);
continue;
}
// We have the lease on the log
oldLogs = getLogFiles();
if (getMaxLogId(oldLogs) > flushLogId) {
// Someone else created new logs
LOG.debug("someone else created new logs. expected maxLogId < " + flushLogId);
logs.getLast().removeFile();
continue;
}
LOG.info("lease acquired flushLogId=" + flushLogId);
break;
}
}
@Override
public Iterator<Procedure> load() throws IOException {
if (logs.isEmpty()) {
throw new RuntimeException("recoverLease() must be called before loading data");
}
// Nothing to do, If we have only the current log.
if (logs.size() == 1) {
LOG.debug("No state logs to replay");
return null;
}
// Load the old logs
final ArrayList<ProcedureWALFile> toRemove = new ArrayList<ProcedureWALFile>();
Iterator<ProcedureWALFile> it = logs.descendingIterator();
it.next(); // Skip the current log
try {
return ProcedureWALFormat.load(it, storeTracker, new ProcedureWALFormat.Loader() {
@Override
public void removeLog(ProcedureWALFile log) {
toRemove.add(log);
}
@Override
public void markCorruptedWAL(ProcedureWALFile log, IOException e) {
if (corruptedLogs == null) {
corruptedLogs = new HashSet<ProcedureWALFile>();
}
corruptedLogs.add(log);
// TODO: sideline corrupted log
}
});
} finally {
if (!toRemove.isEmpty()) {
for (ProcedureWALFile log: toRemove) {
removeLogFile(log);
}
}
}
}
@Override
public void insert(final Procedure proc, final Procedure[] subprocs) {
if (LOG.isTraceEnabled()) {
LOG.trace("insert " + proc + " subproc=" + Arrays.toString(subprocs));
}
ByteSlot slot = acquireSlot();
long logId = -1;
try {
// Serialize the insert
if (subprocs != null) {
ProcedureWALFormat.writeInsert(slot, proc, subprocs);
} else {
assert !proc.hasParent();
ProcedureWALFormat.writeInsert(slot, proc);
}
// Push the transaction data and wait until it is persisted
logId = pushData(slot);
} catch (IOException e) {
// We are not able to serialize the procedure.
// this is a code error, and we are not able to go on.
LOG.fatal("Unable to serialize one of the procedure: proc=" + proc +
" subprocs=" + Arrays.toString(subprocs), e);
throw new RuntimeException(e);
} finally {
releaseSlot(slot);
}
// Update the store tracker
synchronized (storeTracker) {
if (logId == flushLogId) {
storeTracker.insert(proc, subprocs);
}
}
}
@Override
public void update(final Procedure proc) {
if (LOG.isTraceEnabled()) {
LOG.trace("update " + proc);
}
ByteSlot slot = acquireSlot();
long logId = -1;
try {
// Serialize the update
ProcedureWALFormat.writeUpdate(slot, proc);
// Push the transaction data and wait until it is persisted
logId = pushData(slot);
} catch (IOException e) {
// We are not able to serialize the procedure.
// this is a code error, and we are not able to go on.
LOG.fatal("Unable to serialize the procedure: " + proc, e);
throw new RuntimeException(e);
} finally {
releaseSlot(slot);
}
// Update the store tracker
boolean removeOldLogs = false;
synchronized (storeTracker) {
if (logId == flushLogId) {
storeTracker.update(proc);
removeOldLogs = storeTracker.isUpdated();
}
}
if (removeOldLogs) {
removeAllLogs(logId - 1);
}
}
@Override
public void delete(final long procId) {
if (LOG.isTraceEnabled()) {
LOG.trace("delete " + procId);
}
ByteSlot slot = acquireSlot();
long logId = -1;
try {
// Serialize the delete
ProcedureWALFormat.writeDelete(slot, procId);
// Push the transaction data and wait until it is persisted
logId = pushData(slot);
} catch (IOException e) {
// We are not able to serialize the procedure.
// this is a code error, and we are not able to go on.
LOG.fatal("Unable to serialize the procedure: " + procId, e);
throw new RuntimeException(e);
} finally {
releaseSlot(slot);
}
boolean removeOldLogs = false;
synchronized (storeTracker) {
if (logId == flushLogId) {
storeTracker.delete(procId);
if (storeTracker.isEmpty()) {
removeOldLogs = rollWriterOrDie(logId + 1);
}
}
}
if (removeOldLogs) {
removeAllLogs(logId);
}
}
private ByteSlot acquireSlot() {
ByteSlot slot = slotsCache.poll();
return slot != null ? slot : new ByteSlot();
}
private void releaseSlot(final ByteSlot slot) {
slot.reset();
slotsCache.offer(slot);
}
private long pushData(final ByteSlot slot) {
assert !logs.isEmpty() : "recoverLease() must be called before inserting data";
long logId = -1;
lock.lock();
try {
// Wait for the sync to be completed
while (true) {
if (inSync.get()) {
syncCond.await();
} else if (slotIndex == slots.length) {
slotCond.signal();
syncCond.await();
} else {
break;
}
}
slots[slotIndex++] = slot;
logId = flushLogId;
// Notify that there is new data
if (slotIndex == 1) {
waitCond.signal();
}
// Notify that the slots are full
if (slotIndex == slots.length) {
slotCond.signal();
}
syncCond.await();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
sendAbortProcessSignal();
} finally {
lock.unlock();
}
return logId;
}
private void syncLoop() throws IOException {
inSync.set(false);
while (running.get()) {
lock.lock();
try {
// Wait until new data is available
if (slotIndex == 0) {
if (LOG.isTraceEnabled()) {
LOG.trace("Waiting for data. flushed=" + StringUtils.humanSize(totalSynced));
}
waitCond.await();
if (slotIndex == 0) {
// no data.. probably a stop()
continue;
}
}
// Wait SYNC_WAIT_MSEC or the signal of "slots full" before flushing
slotCond.await(syncWaitMsec, TimeUnit.MILLISECONDS);
inSync.set(true);
totalSynced += syncSlots();
slotIndex = 0;
inSync.set(false);
syncCond.signalAll();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
sendAbortProcessSignal();
} finally {
lock.unlock();
}
}
}
private long syncSlots() {
int retry = 0;
long totalSynced = 0;
do {
try {
totalSynced = syncSlots(stream, slots, 0, slotIndex);
break;
} catch (Throwable e) {
if (++retry == MAX_RETRIES_BEFORE_ABORT) {
LOG.error("sync slot failed, abort.", e);
sendAbortProcessSignal();
}
}
} while (running.get());
return totalSynced;
}
protected long syncSlots(FSDataOutputStream stream, ByteSlot[] slots, int offset, int count)
throws IOException {
long totalSynced = 0;
for (int i = 0; i < count; ++i) {
ByteSlot data = slots[offset + i];
data.writeTo(stream);
totalSynced += data.size();
}
stream.hsync();
if (LOG.isTraceEnabled()) {
LOG.trace("Sync slots=" + count + '/' + slots.length +
" flushed=" + StringUtils.humanSize(totalSynced));
}
return totalSynced;
}
private void sendAbortProcessSignal() {
if (!this.listeners.isEmpty()) {
for (ProcedureStoreListener listener : this.listeners) {
listener.abortProcess();
}
}
}
private boolean rollWriterOrDie(final long logId) {
try {
return rollWriter(logId);
} catch (IOException e) {
LOG.warn("Unable to roll the log", e);
sendAbortProcessSignal();
return false;
}
}
private boolean rollWriter(final long logId) throws IOException {
ProcedureWALHeader header = ProcedureWALHeader.newBuilder()
.setVersion(ProcedureWALFormat.HEADER_VERSION)
.setType(ProcedureWALFormat.LOG_TYPE_STREAM)
.setMinProcId(storeTracker.getMinProcId())
.setLogId(logId)
.build();
FSDataOutputStream newStream = null;
Path newLogFile = null;
long startPos = -1;
try {
newLogFile = getLogFilePath(logId);
newStream = fs.create(newLogFile, false);
ProcedureWALFormat.writeHeader(newStream, header);
startPos = newStream.getPos();
} catch (FileAlreadyExistsException e) {
LOG.error("Log file with id=" + logId + " already exists", e);
return false;
}
lock.lock();
try {
closeStream();
synchronized (storeTracker) {
storeTracker.resetUpdates();
}
stream = newStream;
flushLogId = logId;
totalSynced = 0;
logs.add(new ProcedureWALFile(fs, newLogFile, header, startPos));
} finally {
lock.unlock();
}
LOG.info("Roll new state log: " + logId);
return true;
}
private void closeStream() {
try {
if (stream != null) {
try {
ProcedureWALFormat.writeTrailer(stream, storeTracker);
} catch (IOException e) {
LOG.warn("Unable to write the trailer: " + e.getMessage());
}
stream.close();
}
} catch (IOException e) {
LOG.error("Unable to close the stream", e);
} finally {
stream = null;
}
}
private void removeAllLogs(long lastLogId) {
LOG.info("Remove all state logs with ID less then " + lastLogId);
while (!logs.isEmpty()) {
ProcedureWALFile log = logs.getFirst();
if (lastLogId < log.getLogId()) {
break;
}
removeLogFile(log);
}
}
private boolean removeLogFile(final ProcedureWALFile log) {
try {
LOG.debug("remove log: " + log);
log.removeFile();
logs.remove(log);
} catch (IOException e) {
LOG.error("unable to remove log " + log, e);
return false;
}
return true;
}
public Set<ProcedureWALFile> getCorruptedLogs() {
return corruptedLogs;
}
// ==========================================================================
// FileSystem Log Files helpers
// ==========================================================================
public Path getLogDir() {
return this.logDir;
}
public FileSystem getFileSystem() {
return this.fs;
}
protected Path getLogFilePath(final long logId) throws IOException {
return new Path(logDir, String.format("state-%020d.log", logId));
}
private static long getLogIdFromName(final String name) {
int end = name.lastIndexOf(".log");
int start = name.lastIndexOf('-') + 1;
while (start < end) {
if (name.charAt(start) != '0')
break;
start++;
}
return Long.parseLong(name.substring(start, end));
}
private FileStatus[] getLogFiles() throws IOException {
try {
return fs.listStatus(logDir, new PathFilter() {
@Override
public boolean accept(Path path) {
String name = path.getName();
return name.startsWith("state-") && name.endsWith(".log");
}
});
} catch (FileNotFoundException e) {
LOG.warn("log directory not found: " + e.getMessage());
return null;
}
}
private long getMaxLogId(final FileStatus[] logFiles) {
long maxLogId = 0;
if (logFiles != null && logFiles.length > 0) {
for (int i = 0; i < logFiles.length; ++i) {
maxLogId = Math.max(maxLogId, getLogIdFromName(logFiles[i].getPath().getName()));
}
}
return maxLogId;
}
/**
* @return Max-LogID of the specified log file set
*/
private long initOldLogs(final FileStatus[] logFiles) throws IOException {
this.logs.clear();
long maxLogId = 0;
if (logFiles != null && logFiles.length > 0) {
for (int i = 0; i < logFiles.length; ++i) {
final Path logPath = logFiles[i].getPath();
leaseRecovery.recoverFileLease(fs, logPath);
maxLogId = Math.max(maxLogId, getLogIdFromName(logPath.getName()));
ProcedureWALFile log = initOldLog(logFiles[i]);
if (log != null) {
this.logs.add(log);
}
}
Collections.sort(this.logs);
initTrackerFromOldLogs();
}
return maxLogId;
}
private void initTrackerFromOldLogs() {
// TODO: Load the most recent tracker available
if (!logs.isEmpty()) {
ProcedureWALFile log = logs.getLast();
try {
log.readTracker(storeTracker);
} catch (IOException e) {
LOG.error("Unable to read tracker for " + log, e);
// try the next one...
storeTracker.clear();
storeTracker.setPartialFlag(true);
}
}
}
private ProcedureWALFile initOldLog(final FileStatus logFile) throws IOException {
ProcedureWALFile log = new ProcedureWALFile(fs, logFile);
if (logFile.getLen() == 0) {
LOG.warn("Remove uninitialized log " + logFile);
log.removeFile();
return null;
}
LOG.debug("opening state-log: " + logFile);
try {
log.open();
} catch (ProcedureWALFormat.InvalidWALDataException e) {
LOG.warn("Remove uninitialized log " + logFile, e);
log.removeFile();
return null;
} catch (IOException e) {
String msg = "Unable to read state log: " + logFile;
LOG.error(msg, e);
throw new IOException(msg, e);
}
if (log.isCompacted()) {
try {
log.readTrailer();
} catch (IOException e) {
// unfinished compacted log throw it away
LOG.warn("Unfinished compacted log " + logFile, e);
log.removeFile();
return null;
}
}
return log;
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2.util;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Arrays;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
/**
* Similar to the ByteArrayOutputStream, with the exception that we can prepend an header.
* e.g. you write some data and you want to prepend an header that contains the data len or cksum.
* <code>
* ByteSlot slot = new ByteSlot();
* // write data
* slot.write(...);
* slot.write(...);
* // write header with the size of the written data
* slot.markHead();
* slot.write(Bytes.toBytes(slot.size()));
* // flush to stream as [header, data]
* slot.writeTo(stream);
* </code>
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class ByteSlot extends OutputStream {
private static final int DOUBLE_GROW_LIMIT = 1 << 20;
private static final int GROW_ALIGN = 128;
private byte[] buf;
private int head;
private int size;
public void reset() {
head = 0;
size = 0;
}
public void markHead() {
head = size;
}
public int getHead() {
return head;
}
public int size() {
return size;
}
public byte[] getBuffer() {
return buf;
}
public void writeAt(int offset, int b) {
head = Math.min(head, offset);
buf[offset] = (byte)b;
}
public void write(int b) {
ensureCapacity(size + 1);
buf[size++] = (byte)b;
}
public void write(byte[] b, int off, int len) {
ensureCapacity(size + len);
System.arraycopy(b, off, buf, size, len);
size += len;
}
public void writeTo(final OutputStream stream) throws IOException {
if (head != 0) {
stream.write(buf, head, size - head);
stream.write(buf, 0, head);
} else {
stream.write(buf, 0, size);
}
}
private void ensureCapacity(int minCapacity) {
minCapacity = (minCapacity + (GROW_ALIGN - 1)) & -GROW_ALIGN;
if (buf == null) {
buf = new byte[minCapacity];
} else if (minCapacity > buf.length) {
int newCapacity = buf.length << 1;
if (minCapacity > newCapacity || newCapacity > DOUBLE_GROW_LIMIT) {
newCapacity = minCapacity;
}
buf = Arrays.copyOf(buf, newCapacity);
}
}
}

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hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/util/StringUtils.java Normal file
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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2.util;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
@InterfaceAudience.Private
@InterfaceStability.Evolving
public final class StringUtils {
private StringUtils() {}
public static String humanTimeDiff(long timeDiff) {
StringBuilder buf = new StringBuilder();
long hours = timeDiff / (60*60*1000);
long rem = (timeDiff % (60*60*1000));
long minutes = rem / (60*1000);
rem = rem % (60*1000);
float seconds = rem / 1000.0f;
if (hours != 0){
buf.append(hours);
buf.append("hrs, ");
}
if (minutes != 0){
buf.append(minutes);
buf.append("mins, ");
}
if (hours > 0 || minutes > 0) {
buf.append(seconds);
buf.append("sec");
} else {
buf.append(String.format("%.4fsec", seconds));
}
return buf.toString();
}
public static String humanSize(double size) {
if (size >= (1L << 40)) return String.format("%.1fT", size / (1L << 40));
if (size >= (1L << 30)) return String.format("%.1fG", size / (1L << 30));
if (size >= (1L << 20)) return String.format("%.1fM", size / (1L << 20));
if (size >= (1L << 10)) return String.format("%.1fK", size / (1L << 10));
return String.format("%.0f", size);
}
public static boolean isEmpty(final String input) {
return input == null || input.length() == 0;
}
public static String buildString(final String... parts) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < parts.length; ++i) {
sb.append(parts[i]);
}
return sb.toString();
}
public static StringBuilder appendStrings(final StringBuilder sb, final String... parts) {
for (int i = 0; i < parts.length; ++i) {
sb.append(parts[i]);
}
return sb;
}
}

217
hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/util/TimeoutBlockingQueue.java Normal file
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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2.util;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.ReentrantLock;
import java.util.concurrent.TimeUnit;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class TimeoutBlockingQueue<E> {
public static interface TimeoutRetriever<T> {
long getTimeout(T object);
TimeUnit getTimeUnit(T object);
}
private final ReentrantLock lock = new ReentrantLock();
private final Condition waitCond = lock.newCondition();
private final TimeoutRetriever<? super E> timeoutRetriever;
private E[] objects;
private int head = 0;
private int tail = 0;
public TimeoutBlockingQueue(TimeoutRetriever<? super E> timeoutRetriever) {
this(32, timeoutRetriever);
}
@SuppressWarnings("unchecked")
public TimeoutBlockingQueue(int capacity, TimeoutRetriever<? super E> timeoutRetriever) {
this.objects = (E[])new Object[capacity];
this.timeoutRetriever = timeoutRetriever;
}
public void dump() {
for (int i = 0; i < objects.length; ++i) {
if (i == head) {
System.out.print("[" + objects[i] + "] ");
} else if (i == tail) {
System.out.print("]" + objects[i] + "[ ");
} else {
System.out.print(objects[i] + " ");
}
}
System.out.println();
}
public void clear() {
lock.lock();
try {
if (head != tail) {
for (int i = head; i < tail; ++i) {
objects[i] = null;
}
head = 0;
tail = 0;
waitCond.signal();
}
} finally {
lock.unlock();
}
}
public void add(E e) {
if (e == null) throw new NullPointerException();
lock.lock();
try {
addElement(e);
waitCond.signal();
} finally {
lock.unlock();
}
}
@edu.umd.cs.findbugs.annotations.SuppressWarnings("WA_AWAIT_NOT_IN_LOOP")
public E poll() {
lock.lock();
try {
if (isEmpty()) {
waitCond.await();
return null;
}
E elem = objects[head];
long nanos = getNanosTimeout(elem);
nanos = waitCond.awaitNanos(nanos);
return nanos > 0 ? null : removeFirst();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
return null;
} finally {
lock.unlock();
}
}
public int size() {
return tail - head;
}
public boolean isEmpty() {
return (tail - head) == 0;
}
public void signalAll() {
lock.lock();
try {
waitCond.signalAll();
} finally {
lock.unlock();
}
}
private void addElement(E elem) {
int size = (tail - head);
if ((objects.length - size) == 0) {
int capacity = size + ((size < 64) ? (size + 2) : (size >> 1));
E[] newObjects = (E[])new Object[capacity];
if (compareTimeouts(objects[tail - 1], elem) <= 0) {
// Append
System.arraycopy(objects, head, newObjects, 0, tail);
tail -= head;
newObjects[tail++] = elem;
} else if (compareTimeouts(objects[head], elem) > 0) {
// Prepend
System.arraycopy(objects, head, newObjects, 1, tail);
newObjects[0] = elem;
tail -= (head - 1);
} else {
// Insert in the middle
int index = upperBound(head, tail - 1, elem);
int newIndex = (index - head);
System.arraycopy(objects, head, newObjects, 0, newIndex);
newObjects[newIndex] = elem;
System.arraycopy(objects, index, newObjects, newIndex + 1, tail - index);
tail -= (head - 1);
}
head = 0;
objects = newObjects;
} else {
if (tail == objects.length) {
// shift down |-----AAAAAAA|
tail -= head;
System.arraycopy(objects, head, objects, 0, tail);
head = 0;
}
if (tail == head || compareTimeouts(objects[tail - 1], elem) <= 0) {
// Append
objects[tail++] = elem;
} else if (head > 0 && compareTimeouts(objects[head], elem) > 0) {
// Prepend
objects[--head] = elem;
} else {
// Insert in the middle
int index = upperBound(head, tail - 1, elem);
System.arraycopy(objects, index, objects, index + 1, tail - index);
objects[index] = elem;
tail++;
}
}
}
private E removeFirst() {
E elem = objects[head];
objects[head] = null;
head = (head + 1) % objects.length;
if (head == 0) tail = 0;
return elem;
}
private int upperBound(int start, int end, E key) {
while (start < end) {
int mid = (start + end) >>> 1;
E mitem = objects[mid];
int cmp = compareTimeouts(mitem, key);
if (cmp > 0) {
end = mid;
} else {
start = mid + 1;
}
}
return start;
}
private int compareTimeouts(final E a, final E b) {
long t1 = getNanosTimeout(a);
long t2 = getNanosTimeout(b);
return (t1 < t2) ? -1 : (t1 > t2) ? 1 : 0;
}
private long getNanosTimeout(final E obj) {
TimeUnit unit = timeoutRetriever.getTimeUnit(obj);
long timeout = timeoutRetriever.getTimeout(obj);
return unit.toNanos(timeout);
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import java.io.IOException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.util.Threads;
import org.apache.hadoop.hbase.procedure2.store.ProcedureStore;
import org.apache.hadoop.hbase.procedure2.store.wal.WALProcedureStore;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
public class ProcedureTestingUtility {
private static final Log LOG = LogFactory.getLog(ProcedureTestingUtility.class);
private ProcedureTestingUtility() {
}
public static ProcedureStore createStore(final Configuration conf, final FileSystem fs,
final Path baseDir) throws IOException {
return createWalStore(conf, fs, baseDir);
}
public static WALProcedureStore createWalStore(final Configuration conf, final FileSystem fs,
final Path logDir) throws IOException {
return new WALProcedureStore(conf, fs, logDir, new WALProcedureStore.LeaseRecovery() {
@Override
public void recoverFileLease(FileSystem fs, Path path) throws IOException {
// no-op
}
});
}
public static <TEnv> void restart(ProcedureExecutor<TEnv> procExecutor)
throws Exception {
restart(procExecutor, null);
}
public static <TEnv> void restart(ProcedureExecutor<TEnv> procExecutor,
Runnable beforeStartAction) throws Exception {
ProcedureStore procStore = procExecutor.getStore();
int storeThreads = procExecutor.getNumThreads();
int execThreads = procExecutor.getNumThreads();
// stop
procExecutor.stop();
procStore.stop(false);
procExecutor.join();
// nothing running...
if (beforeStartAction != null) {
beforeStartAction.run();
}
// re-start
procStore.start(storeThreads);
procExecutor.start(execThreads);
}
public static <TEnv> void setKillBeforeStoreUpdate(ProcedureExecutor<TEnv> procExecutor,
boolean value) {
if (procExecutor.testing == null) {
procExecutor.testing = new ProcedureExecutor.Testing();
}
procExecutor.testing.killBeforeStoreUpdate = value;
LOG.warn("Set Kill before store update to: " + procExecutor.testing.killBeforeStoreUpdate);
}
public static <TEnv> void setToggleKillBeforeStoreUpdate(ProcedureExecutor<TEnv> procExecutor,
boolean value) {
if (procExecutor.testing == null) {
procExecutor.testing = new ProcedureExecutor.Testing();
}
procExecutor.testing.toggleKillBeforeStoreUpdate = value;
}
public static <TEnv> void toggleKillBeforeStoreUpdate(ProcedureExecutor<TEnv> procExecutor) {
if (procExecutor.testing == null) {
procExecutor.testing = new ProcedureExecutor.Testing();
}
procExecutor.testing.killBeforeStoreUpdate = !procExecutor.testing.killBeforeStoreUpdate;
LOG.warn("Set Kill before store update to: " + procExecutor.testing.killBeforeStoreUpdate);
}
public static <TEnv> void setKillAndToggleBeforeStoreUpdate(ProcedureExecutor<TEnv> procExecutor,
boolean value) {
ProcedureTestingUtility.setKillBeforeStoreUpdate(procExecutor, value);
ProcedureTestingUtility.setToggleKillBeforeStoreUpdate(procExecutor, value);
}
public static <TEnv> long submitAndWait(ProcedureExecutor<TEnv> procExecutor, Procedure proc) {
long procId = procExecutor.submitProcedure(proc);
waitProcedure(procExecutor, procId);
return procId;
}
public static <TEnv> void waitProcedure(ProcedureExecutor<TEnv> procExecutor, long procId) {
while (!procExecutor.isFinished(procId) && procExecutor.isRunning()) {
Threads.sleepWithoutInterrupt(250);
}
}
public static <TEnv> void waitNoProcedureRunning(ProcedureExecutor<TEnv> procExecutor) {
int stableRuns = 0;
while (stableRuns < 10) {
if (procExecutor.getActiveExecutorCount() > 0 || procExecutor.getRunnableSet().size() > 0) {
stableRuns = 0;
Threads.sleepWithoutInterrupt(100);
} else {
stableRuns++;
Threads.sleepWithoutInterrupt(25);
}
}
}
public static <TEnv> void assertProcNotYetCompleted(ProcedureExecutor<TEnv> procExecutor,
long procId) {
assertFalse("expected a running proc", procExecutor.isFinished(procId));
assertEquals(null, procExecutor.getResult(procId));
}
public static <TEnv> void assertProcNotFailed(ProcedureExecutor<TEnv> procExecutor,
long procId) {
ProcedureResult result = procExecutor.getResult(procId);
assertTrue("expected procedure result", result != null);
assertProcNotFailed(result);
}
public static void assertProcNotFailed(final ProcedureResult result) {
Exception exception = result.getException();
String msg = exception != null ? exception.toString() : "no exception found";
assertFalse(msg, result.isFailed());
}
public static void assertIsAbortException(final ProcedureResult result) {
LOG.info(result.getException());
assertEquals(true, result.isFailed());
Throwable cause = result.getException().getCause();
assertTrue("expected abort exception, got "+ cause,
cause instanceof ProcedureAbortedException);
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeoutException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseCommonTestingUtility;
import org.apache.hadoop.hbase.procedure2.store.ProcedureStore;
import org.apache.hadoop.hbase.protobuf.generated.ProcedureProtos.ProcedureState;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.apache.hadoop.hbase.testclassification.MasterTests;
import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
import org.junit.After;
import org.junit.Before;
import org.junit.Assert;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
@Category({MasterTests.class, SmallTests.class})
public class TestProcedureExecution {
private static final Log LOG = LogFactory.getLog(TestProcedureExecution.class);
private static final int PROCEDURE_EXECUTOR_SLOTS = 1;
private static final Procedure NULL_PROC = null;
private ProcedureExecutor<Void> procExecutor;
private ProcedureStore procStore;
private HBaseCommonTestingUtility htu;
private FileSystem fs;
private Path testDir;
private Path logDir;
@Before
public void setUp() throws IOException {
htu = new HBaseCommonTestingUtility();
testDir = htu.getDataTestDir();
fs = testDir.getFileSystem(htu.getConfiguration());
assertTrue(testDir.depth() > 1);
logDir = new Path(testDir, "proc-logs");
procStore = ProcedureTestingUtility.createWalStore(htu.getConfiguration(), fs, logDir);
procExecutor = new ProcedureExecutor(htu.getConfiguration(), null, procStore);
procStore.start(PROCEDURE_EXECUTOR_SLOTS);
procExecutor.start(PROCEDURE_EXECUTOR_SLOTS);
}
@After
public void tearDown() throws IOException {
procExecutor.stop();
procStore.stop(false);
fs.delete(logDir, true);
}
private static class TestProcedureException extends Exception {
public TestProcedureException(String msg) { super(msg); }
}
public static class TestSequentialProcedure extends SequentialProcedure<Void> {
private final Procedure[] subProcs;
private final List<String> state;
private final Exception failure;
private final String name;
public TestSequentialProcedure() {
throw new UnsupportedOperationException("recovery should not be triggered here");
}
public TestSequentialProcedure(String name, List<String> state, Procedure... subProcs) {
this.state = state;
this.subProcs = subProcs;
this.name = name;
this.failure = null;
}
public TestSequentialProcedure(String name, List<String> state, Exception failure) {
this.state = state;
this.subProcs = null;
this.name = name;
this.failure = failure;
}
@Override
protected Procedure[] execute(Void env) {
state.add(name + "-execute");
if (failure != null) {
setFailure(new RemoteProcedureException(name + "-failure", failure));
return null;
}
return subProcs;
}
@Override
protected void rollback(Void env) {
state.add(name + "-rollback");
}
@Override
protected boolean abort(Void env) {
state.add(name + "-abort");
return true;
}
}
@Test(timeout=30000)
public void testBadSubprocList() {
List<String> state = new ArrayList<String>();
Procedure subProc2 = new TestSequentialProcedure("subProc2", state);
Procedure subProc1 = new TestSequentialProcedure("subProc1", state, subProc2, NULL_PROC);
Procedure rootProc = new TestSequentialProcedure("rootProc", state, subProc1);
long rootId = ProcedureTestingUtility.submitAndWait(procExecutor, rootProc);
// subProc1 has a "null" subprocedure which is catched as InvalidArgument
// failed state with 2 execute and 2 rollback
LOG.info(state);
ProcedureResult result = procExecutor.getResult(rootId);
LOG.info(result.getException());
assertTrue(state.toString(), result.isFailed());
assertTrue(result.getException().toString(),
result.getException().getCause() instanceof IllegalArgumentException);
assertEquals(state.toString(), 4, state.size());
assertEquals("rootProc-execute", state.get(0));
assertEquals("subProc1-execute", state.get(1));
assertEquals("subProc1-rollback", state.get(2));
assertEquals("rootProc-rollback", state.get(3));
}
@Test(timeout=30000)
public void testSingleSequentialProc() {
List<String> state = new ArrayList<String>();
Procedure subProc2 = new TestSequentialProcedure("subProc2", state);
Procedure subProc1 = new TestSequentialProcedure("subProc1", state, subProc2);
Procedure rootProc = new TestSequentialProcedure("rootProc", state, subProc1);
long rootId = ProcedureTestingUtility.submitAndWait(procExecutor, rootProc);
// successful state, with 3 execute
LOG.info(state);
ProcedureResult result = procExecutor.getResult(rootId);
ProcedureTestingUtility.assertProcNotFailed(result);
assertEquals(state.toString(), 3, state.size());
}
@Test(timeout=30000)
public void testSingleSequentialProcRollback() {
List<String> state = new ArrayList<String>();
Procedure subProc2 = new TestSequentialProcedure("subProc2", state,
new TestProcedureException("fail test"));
Procedure subProc1 = new TestSequentialProcedure("subProc1", state, subProc2);
Procedure rootProc = new TestSequentialProcedure("rootProc", state, subProc1);
long rootId = ProcedureTestingUtility.submitAndWait(procExecutor, rootProc);
// the 3rd proc fail, rollback after 2 successful execution
LOG.info(state);
ProcedureResult result = procExecutor.getResult(rootId);
LOG.info(result.getException());
assertTrue(state.toString(), result.isFailed());
assertTrue(result.getException().toString(),
result.getException().getCause() instanceof TestProcedureException);
assertEquals(state.toString(), 6, state.size());
assertEquals("rootProc-execute", state.get(0));
assertEquals("subProc1-execute", state.get(1));
assertEquals("subProc2-execute", state.get(2));
assertEquals("subProc2-rollback", state.get(3));
assertEquals("subProc1-rollback", state.get(4));
assertEquals("rootProc-rollback", state.get(5));
}
public static class TestFaultyRollback extends SequentialProcedure<Void> {
private int retries = 0;
public TestFaultyRollback() { }
@Override
protected Procedure[] execute(Void env) {
setFailure("faulty-rollback-test", new TestProcedureException("test faulty rollback"));
return null;
}
@Override
protected void rollback(Void env) throws IOException {
if (++retries < 3) {
LOG.info("inject rollback failure " + retries);
throw new IOException("injected failure number " + retries);
}
LOG.info("execute non faulty rollback step retries=" + retries);
}
@Override
protected boolean abort(Void env) { return false; }
}
@Test(timeout=30000)
public void testRollbackRetriableFailure() {
long procId = ProcedureTestingUtility.submitAndWait(procExecutor, new TestFaultyRollback());
ProcedureResult result = procExecutor.getResult(procId);
LOG.info(result.getException());
assertTrue("expected a failure", result.isFailed());
assertTrue(result.getException().toString(),
result.getException().getCause() instanceof TestProcedureException);
}
public static class TestWaitingProcedure extends SequentialProcedure<Void> {
private final List<String> state;
private final boolean hasChild;
private final String name;
public TestWaitingProcedure() {
throw new UnsupportedOperationException("recovery should not be triggered here");
}
public TestWaitingProcedure(String name, List<String> state, boolean hasChild) {
this.hasChild = hasChild;
this.state = state;
this.name = name;
}
@Override
protected Procedure[] execute(Void env) {
state.add(name + "-execute");
setState(ProcedureState.WAITING_TIMEOUT);
return hasChild ? new Procedure[] { new TestWaitChild(name, state) } : null;
}
@Override
protected void rollback(Void env) {
state.add(name + "-rollback");
}
@Override
protected boolean abort(Void env) {
state.add(name + "-abort");
return true;
}
public static class TestWaitChild extends SequentialProcedure<Void> {
private final List<String> state;
private final String name;
public TestWaitChild() {
throw new UnsupportedOperationException("recovery should not be triggered here");
}
public TestWaitChild(String name, List<String> state) {
this.name = name;
this.state = state;
}
@Override
protected Procedure[] execute(Void env) {
state.add(name + "-child-execute");
return null;
}
@Override
protected void rollback(Void env) {
state.add(name + "-child-rollback");
}
@Override
protected boolean abort(Void env) {
state.add(name + "-child-abort");
return true;
}
}
}
@Test(timeout=30000)
public void testAbortTimeout() {
final int PROC_TIMEOUT_MSEC = 2500;
List<String> state = new ArrayList<String>();
Procedure proc = new TestWaitingProcedure("wproc", state, false);
proc.setTimeout(PROC_TIMEOUT_MSEC);
long startTime = EnvironmentEdgeManager.currentTime();
long rootId = ProcedureTestingUtility.submitAndWait(procExecutor, proc);
long execTime = EnvironmentEdgeManager.currentTime() - startTime;
LOG.info(state);
assertTrue("we didn't wait enough execTime=" + execTime, execTime >= PROC_TIMEOUT_MSEC);
ProcedureResult result = procExecutor.getResult(rootId);
LOG.info(result.getException());
assertTrue(state.toString(), result.isFailed());
assertTrue(result.getException().toString(),
result.getException().getCause() instanceof TimeoutException);
assertEquals(state.toString(), 2, state.size());
assertEquals("wproc-execute", state.get(0));
assertEquals("wproc-rollback", state.get(1));
}
@Test(timeout=30000)
public void testAbortTimeoutWithChildren() {
List<String> state = new ArrayList<String>();
Procedure proc = new TestWaitingProcedure("wproc", state, true);
proc.setTimeout(2500);
long rootId = ProcedureTestingUtility.submitAndWait(procExecutor, proc);
LOG.info(state);
ProcedureResult result = procExecutor.getResult(rootId);
LOG.info(result.getException());
assertTrue(state.toString(), result.isFailed());
assertTrue(result.getException().toString(),
result.getException().getCause() instanceof TimeoutException);
assertEquals(state.toString(), 4, state.size());
assertEquals("wproc-execute", state.get(0));
assertEquals("wproc-child-execute", state.get(1));
assertEquals("wproc-child-rollback", state.get(2));
assertEquals("wproc-rollback", state.get(3));
}
}

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hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/TestProcedureFairRunQueues.java Normal file
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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.apache.hadoop.hbase.testclassification.MasterTests;
import org.junit.Assert;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import static org.junit.Assert.assertEquals;
@Category({MasterTests.class, SmallTests.class})
public class TestProcedureFairRunQueues {
private static class TestRunQueue implements ProcedureFairRunQueues.FairObject {
private final int priority;
private final String name;
private boolean available = true;
public TestRunQueue(String name, int priority) {
this.name = name;
this.priority = priority;
}
@Override
public String toString() {
return name;
}
private void setAvailable(boolean available) {
this.available = available;
}
@Override
public boolean isAvailable() {
return available;
}
@Override
public int getPriority() {
return priority;
}
}
@Test
public void testEmptyFairQueues() throws Exception {
ProcedureFairRunQueues<String, TestRunQueue> fairq
= new ProcedureFairRunQueues<String, TestRunQueue>(1);
for (int i = 0; i < 3; ++i) {
assertEquals(null, fairq.poll());
}
}
@Test
public void testFairQueues() throws Exception {
ProcedureFairRunQueues<String, TestRunQueue> fairq
= new ProcedureFairRunQueues<String, TestRunQueue>(1);
TestRunQueue a = fairq.add("A", new TestRunQueue("A", 1));
TestRunQueue b = fairq.add("B", new TestRunQueue("B", 1));
TestRunQueue m = fairq.add("M", new TestRunQueue("M", 2));
for (int i = 0; i < 3; ++i) {
assertEquals(a, fairq.poll());
assertEquals(b, fairq.poll());
assertEquals(m, fairq.poll());
assertEquals(m, fairq.poll());
}
}
@Test
public void testFairQueuesNotAvailable() throws Exception {
ProcedureFairRunQueues<String, TestRunQueue> fairq
= new ProcedureFairRunQueues<String, TestRunQueue>(1);
TestRunQueue a = fairq.add("A", new TestRunQueue("A", 1));
TestRunQueue b = fairq.add("B", new TestRunQueue("B", 1));
TestRunQueue m = fairq.add("M", new TestRunQueue("M", 2));
// m is not available
m.setAvailable(false);
for (int i = 0; i < 3; ++i) {
assertEquals(a, fairq.poll());
assertEquals(b, fairq.poll());
}
// m is available
m.setAvailable(true);
for (int i = 0; i < 3; ++i) {
assertEquals(m, fairq.poll());
assertEquals(m, fairq.poll());
assertEquals(a, fairq.poll());
assertEquals(b, fairq.poll());
}
// b is not available
b.setAvailable(false);
for (int i = 0; i < 3; ++i) {
assertEquals(m, fairq.poll());
assertEquals(m, fairq.poll());
assertEquals(a, fairq.poll());
}
assertEquals(m, fairq.poll());
m.setAvailable(false);
// m should be fetched next, but is no longer available
assertEquals(a, fairq.poll());
assertEquals(a, fairq.poll());
b.setAvailable(true);
for (int i = 0; i < 3; ++i) {
assertEquals(b, fairq.poll());
assertEquals(a, fairq.poll());
}
}
@Test
public void testFairQueuesDelete() throws Exception {
ProcedureFairRunQueues<String, TestRunQueue> fairq
= new ProcedureFairRunQueues<String, TestRunQueue>(1);
TestRunQueue a = fairq.add("A", new TestRunQueue("A", 1));
TestRunQueue b = fairq.add("B", new TestRunQueue("B", 1));
TestRunQueue m = fairq.add("M", new TestRunQueue("M", 2));
// Fetch A and then remove it
assertEquals(a, fairq.poll());
assertEquals(a, fairq.remove("A"));
// Fetch B and then remove it
assertEquals(b, fairq.poll());
assertEquals(b, fairq.remove("B"));
// Fetch M and then remove it
assertEquals(m, fairq.poll());
assertEquals(m, fairq.remove("M"));
// nothing left
assertEquals(null, fairq.poll());
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseCommonTestingUtility;
import org.apache.hadoop.hbase.procedure2.store.ProcedureStore;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.apache.hadoop.hbase.testclassification.MasterTests;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
import org.apache.hadoop.hbase.util.Threads;
import org.junit.After;
import org.junit.Before;
import org.junit.Assert;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
@Category({MasterTests.class, SmallTests.class})
public class TestProcedureRecovery {
private static final Log LOG = LogFactory.getLog(TestProcedureRecovery.class);
private static final int PROCEDURE_EXECUTOR_SLOTS = 1;
private static final Procedure NULL_PROC = null;
private static ProcedureExecutor<Void> procExecutor;
private static ProcedureStore procStore;
private static int procSleepInterval;
private HBaseCommonTestingUtility htu;
private FileSystem fs;
private Path testDir;
private Path logDir;
@Before
public void setUp() throws IOException {
htu = new HBaseCommonTestingUtility();
testDir = htu.getDataTestDir();
fs = testDir.getFileSystem(htu.getConfiguration());
assertTrue(testDir.depth() > 1);
logDir = new Path(testDir, "proc-logs");
procStore = ProcedureTestingUtility.createStore(htu.getConfiguration(), fs, logDir);
procExecutor = new ProcedureExecutor(htu.getConfiguration(), null, procStore);
procExecutor.testing = new ProcedureExecutor.Testing();
procStore.start(PROCEDURE_EXECUTOR_SLOTS);
procExecutor.start(PROCEDURE_EXECUTOR_SLOTS);
procSleepInterval = 0;
}
@After
public void tearDown() throws IOException {
procExecutor.stop();
procStore.stop(false);
fs.delete(logDir, true);
}
private void restart() throws Exception {
dumpLogDirState();
ProcedureTestingUtility.restart(procExecutor);
dumpLogDirState();
}
public static class TestSingleStepProcedure extends SequentialProcedure<Void> {
private int step = 0;
public TestSingleStepProcedure() { }
@Override
protected Procedure[] execute(Void env) {
LOG.debug("execute procedure " + this + " step=" + step);
step++;
setResult(Bytes.toBytes(step));
return null;
}
@Override
protected void rollback(Void env) { }
@Override
protected boolean abort(Void env) { return true; }
}
public static class BaseTestStepProcedure extends SequentialProcedure<Void> {
private AtomicBoolean abort = new AtomicBoolean(false);
private int step = 0;
@Override
protected Procedure[] execute(Void env) {
LOG.debug("execute procedure " + this + " step=" + step);
ProcedureTestingUtility.toggleKillBeforeStoreUpdate(procExecutor);
step++;
Threads.sleepWithoutInterrupt(procSleepInterval);
if (isAborted()) {
setFailure(new RemoteProcedureException(getClass().getName(),
new ProcedureAbortedException(
"got an abort at " + getClass().getName() + " step=" + step)));
return null;
}
return null;
}
@Override
protected void rollback(Void env) {
LOG.debug("rollback procedure " + this + " step=" + step);
ProcedureTestingUtility.toggleKillBeforeStoreUpdate(procExecutor);
step++;
}
@Override
protected boolean abort(Void env) {
abort.set(true);
return true;
}
private boolean isAborted() {
boolean aborted = abort.get();
BaseTestStepProcedure proc = this;
while (proc.hasParent() && !aborted) {
proc = (BaseTestStepProcedure)procExecutor.getProcedure(proc.getParentProcId());
aborted = proc.isAborted();
}
return aborted;
}
}
public static class TestMultiStepProcedure extends BaseTestStepProcedure {
public TestMultiStepProcedure() { }
@Override
public Procedure[] execute(Void env) {
super.execute(env);
return isFailed() ? null : new Procedure[] { new Step1Procedure() };
}
public static class Step1Procedure extends BaseTestStepProcedure {
public Step1Procedure() { }
@Override
protected Procedure[] execute(Void env) {
super.execute(env);
return isFailed() ? null : new Procedure[] { new Step2Procedure() };
}
}
public static class Step2Procedure extends BaseTestStepProcedure {
public Step2Procedure() { }
}
}
@Test
public void testNoopLoad() throws Exception {
restart();
}
@Test(timeout=30000)
public void testSingleStepProcRecovery() throws Exception {
Procedure proc = new TestSingleStepProcedure();
procExecutor.testing.killBeforeStoreUpdate = true;
long procId = ProcedureTestingUtility.submitAndWait(procExecutor, proc);
assertFalse(procExecutor.isRunning());
procExecutor.testing.killBeforeStoreUpdate = false;
// Restart and verify that the procedures restart
long restartTs = EnvironmentEdgeManager.currentTime();
restart();
waitProcedure(procId);
ProcedureResult result = procExecutor.getResult(procId);
assertTrue(result.getLastUpdate() > restartTs);
ProcedureTestingUtility.assertProcNotFailed(result);
assertEquals(1, Bytes.toInt(result.getResult()));
long resultTs = result.getLastUpdate();
// Verify that after another restart the result is still there
restart();
result = procExecutor.getResult(procId);
ProcedureTestingUtility.assertProcNotFailed(result);
assertEquals(resultTs, result.getLastUpdate());
assertEquals(1, Bytes.toInt(result.getResult()));
}
@Test(timeout=30000)
public void testMultiStepProcRecovery() throws Exception {
// Step 0 - kill
Procedure proc = new TestMultiStepProcedure();
long procId = ProcedureTestingUtility.submitAndWait(procExecutor, proc);
assertFalse(procExecutor.isRunning());
// Step 0 exec && Step 1 - kill
restart();
waitProcedure(procId);
ProcedureTestingUtility.assertProcNotYetCompleted(procExecutor, procId);
assertFalse(procExecutor.isRunning());
// Step 1 exec && step 2 - kill
restart();
waitProcedure(procId);
ProcedureTestingUtility.assertProcNotYetCompleted(procExecutor, procId);
assertFalse(procExecutor.isRunning());
// Step 2 exec
restart();
waitProcedure(procId);
assertTrue(procExecutor.isRunning());
// The procedure is completed
ProcedureResult result = procExecutor.getResult(procId);
ProcedureTestingUtility.assertProcNotFailed(result);
}
@Test(timeout=30000)
public void testMultiStepRollbackRecovery() throws Exception {
// Step 0 - kill
Procedure proc = new TestMultiStepProcedure();
long procId = ProcedureTestingUtility.submitAndWait(procExecutor, proc);
assertFalse(procExecutor.isRunning());
// Step 0 exec && Step 1 - kill
restart();
waitProcedure(procId);
ProcedureTestingUtility.assertProcNotYetCompleted(procExecutor, procId);
assertFalse(procExecutor.isRunning());
// Step 1 exec && step 2 - kill
restart();
waitProcedure(procId);
ProcedureTestingUtility.assertProcNotYetCompleted(procExecutor, procId);
assertFalse(procExecutor.isRunning());
// Step 2 exec - rollback - kill
procSleepInterval = 2500;
restart();
assertTrue(procExecutor.abort(procId));
waitProcedure(procId);
assertFalse(procExecutor.isRunning());
// rollback - kill
restart();
waitProcedure(procId);
ProcedureTestingUtility.assertProcNotYetCompleted(procExecutor, procId);
assertFalse(procExecutor.isRunning());
// rollback - complete
restart();
waitProcedure(procId);
ProcedureTestingUtility.assertProcNotYetCompleted(procExecutor, procId);
assertFalse(procExecutor.isRunning());
// Restart the executor and get the result
restart();
waitProcedure(procId);
// The procedure is completed
ProcedureResult result = procExecutor.getResult(procId);
ProcedureTestingUtility.assertIsAbortException(result);
}
public static class TestStateMachineProcedure
extends StateMachineProcedure<Void, TestStateMachineProcedure.State> {
enum State { STATE_1, STATE_2, STATE_3, DONE }
public TestStateMachineProcedure() {}
private AtomicBoolean aborted = new AtomicBoolean(false);
private int iResult = 0;
@Override
protected StateMachineProcedure.Flow executeFromState(Void env, State state) {
switch (state) {
case STATE_1:
LOG.info("execute step 1 " + this);
setNextState(State.STATE_2);
iResult += 3;
break;
case STATE_2:
LOG.info("execute step 2 " + this);
setNextState(State.STATE_3);
iResult += 5;
break;
case STATE_3:
LOG.info("execute step 3 " + this);
Threads.sleepWithoutInterrupt(procSleepInterval);
if (aborted.get()) {
LOG.info("aborted step 3 " + this);
setAbortFailure("test", "aborted");
break;
}
setNextState(State.DONE);
iResult += 7;
setResult(Bytes.toBytes(iResult));
return Flow.NO_MORE_STATE;
default:
throw new UnsupportedOperationException();
}
return Flow.HAS_MORE_STATE;
}
@Override
protected void rollbackState(Void env, final State state) {
switch (state) {
case STATE_1:
LOG.info("rollback step 1 " + this);
break;
case STATE_2:
LOG.info("rollback step 2 " + this);
break;
case STATE_3:
LOG.info("rollback step 3 " + this);
break;
default:
throw new UnsupportedOperationException();
}
}
@Override
protected State getState(final int stateId) {
return State.values()[stateId];
}
@Override
protected int getStateId(final State state) {
return state.ordinal();
}
@Override
protected State getInitialState() {
return State.STATE_1;
}
@Override
protected boolean abort(Void env) {
aborted.set(true);
return true;
}
@Override
protected void serializeStateData(final OutputStream stream) throws IOException {
super.serializeStateData(stream);
stream.write(Bytes.toBytes(iResult));
}
@Override
protected void deserializeStateData(final InputStream stream) throws IOException {
super.deserializeStateData(stream);
byte[] data = new byte[4];
stream.read(data);
iResult = Bytes.toInt(data);
}
}
@Test(timeout=30000)
public void testStateMachineRecovery() throws Exception {
ProcedureTestingUtility.setToggleKillBeforeStoreUpdate(procExecutor, true);
ProcedureTestingUtility.setKillBeforeStoreUpdate(procExecutor, true);
// Step 1 - kill
Procedure proc = new TestStateMachineProcedure();
long procId = ProcedureTestingUtility.submitAndWait(procExecutor, proc);
assertFalse(procExecutor.isRunning());
// Step 1 exec && Step 2 - kill
restart();
waitProcedure(procId);
ProcedureTestingUtility.assertProcNotYetCompleted(procExecutor, procId);
assertFalse(procExecutor.isRunning());
// Step 2 exec && step 3 - kill
restart();
waitProcedure(procId);
ProcedureTestingUtility.assertProcNotYetCompleted(procExecutor, procId);
assertFalse(procExecutor.isRunning());
// Step 3 exec
restart();
waitProcedure(procId);
assertTrue(procExecutor.isRunning());
// The procedure is completed
ProcedureResult result = procExecutor.getResult(procId);
ProcedureTestingUtility.assertProcNotFailed(result);
assertEquals(15, Bytes.toInt(result.getResult()));
}
@Test(timeout=30000)
public void testStateMachineRollbackRecovery() throws Exception {
ProcedureTestingUtility.setToggleKillBeforeStoreUpdate(procExecutor, true);
ProcedureTestingUtility.setKillBeforeStoreUpdate(procExecutor, true);
// Step 1 - kill
Procedure proc = new TestStateMachineProcedure();
long procId = ProcedureTestingUtility.submitAndWait(procExecutor, proc);
ProcedureTestingUtility.assertProcNotYetCompleted(procExecutor, procId);
assertFalse(procExecutor.isRunning());
// Step 1 exec && Step 2 - kill
restart();
waitProcedure(procId);
ProcedureTestingUtility.assertProcNotYetCompleted(procExecutor, procId);
assertFalse(procExecutor.isRunning());
// Step 2 exec && step 3 - kill
restart();
waitProcedure(procId);
ProcedureTestingUtility.assertProcNotYetCompleted(procExecutor, procId);
assertFalse(procExecutor.isRunning());
// Step 3 exec - rollback step 3 - kill
procSleepInterval = 2500;
restart();
assertTrue(procExecutor.abort(procId));
waitProcedure(procId);
ProcedureTestingUtility.assertProcNotYetCompleted(procExecutor, procId);
assertFalse(procExecutor.isRunning());
// Rollback step 3 - rollback step 2 - kill
restart();
waitProcedure(procId);
assertFalse(procExecutor.isRunning());
ProcedureTestingUtility.assertProcNotYetCompleted(procExecutor, procId);
// Rollback step 2 - step 1 - kill
restart();
waitProcedure(procId);
assertFalse(procExecutor.isRunning());
ProcedureTestingUtility.assertProcNotYetCompleted(procExecutor, procId);
// Rollback step 1 - complete
restart();
waitProcedure(procId);
assertTrue(procExecutor.isRunning());
// The procedure is completed
ProcedureResult result = procExecutor.getResult(procId);
ProcedureTestingUtility.assertIsAbortException(result);
}
private void waitProcedure(final long procId) {
ProcedureTestingUtility.waitProcedure(procExecutor, procId);
dumpLogDirState();
}
private void dumpLogDirState() {
try {
FileStatus[] files = fs.listStatus(logDir);
if (files != null && files.length > 0) {
for (FileStatus file: files) {
assertTrue(file.toString(), file.isFile());
LOG.debug("log file " + file.getPath() + " size=" + file.getLen());
}
} else {
LOG.debug("no files under: " + logDir);
}
} catch (IOException e) {
LOG.warn("Unable to dump " + logDir, e);
}
}
}

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2;
import java.io.IOException;
import java.util.ArrayList;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseCommonTestingUtility;
import org.apache.hadoop.hbase.procedure2.store.ProcedureStore;
import org.apache.hadoop.hbase.testclassification.LargeTests;
import org.apache.hadoop.hbase.testclassification.MasterTests;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
@Category({MasterTests.class, LargeTests.class})
public class TestProcedureReplayOrder {
private static final Log LOG = LogFactory.getLog(TestProcedureReplayOrder.class);
private static final Procedure NULL_PROC = null;
private ProcedureExecutor<Void> procExecutor;
private TestProcedureEnv procEnv;
private ProcedureStore procStore;
private HBaseCommonTestingUtility htu;
private FileSystem fs;
private Path testDir;
private Path logDir;
@Before
public void setUp() throws IOException {
htu = new HBaseCommonTestingUtility();
htu.getConfiguration().setInt("hbase.procedure.store.wal.sync.wait.msec", 10);
testDir = htu.getDataTestDir();
fs = testDir.getFileSystem(htu.getConfiguration());
assertTrue(testDir.depth() > 1);
logDir = new Path(testDir, "proc-logs");
procEnv = new TestProcedureEnv();
procStore = ProcedureTestingUtility.createWalStore(htu.getConfiguration(), fs, logDir);
procExecutor = new ProcedureExecutor(htu.getConfiguration(), procEnv, procStore);
procStore.start(24);
procExecutor.start(1);
}
@After
public void tearDown() throws IOException {
procExecutor.stop();
procStore.stop(false);
fs.delete(logDir, true);
}
@Test(timeout=90000)
public void testSingleStepReplyOrder() throws Exception {
// avoid the procedure to be runnable
procEnv.setAcquireLock(false);
// submit the procedures
submitProcedures(16, 25, TestSingleStepProcedure.class);
// restart the executor and allow the procedures to run
ProcedureTestingUtility.restart(procExecutor, new Runnable() {
@Override
public void run() {
procEnv.setAcquireLock(true);
}
});
// wait the execution of all the procedures and
// assert that the execution order was sorted by procId
ProcedureTestingUtility.waitNoProcedureRunning(procExecutor);
procEnv.assertSortedExecList();
// TODO: FIXME: This should be revisited
}
@Ignore
@Test(timeout=90000)
public void testMultiStepReplyOrder() throws Exception {
// avoid the procedure to be runnable
procEnv.setAcquireLock(false);
// submit the procedures
submitProcedures(16, 10, TestTwoStepProcedure.class);
// restart the executor and allow the procedures to run
ProcedureTestingUtility.restart(procExecutor, new Runnable() {
@Override
public void run() {
procEnv.setAcquireLock(true);
}
});
fail("TODO: FIXME: NOT IMPLEMENT REPLAY ORDER");
}
private void submitProcedures(final int nthreads, final int nprocPerThread,
final Class<?> procClazz) throws Exception {
Thread[] submitThreads = new Thread[nthreads];
for (int i = 0; i < submitThreads.length; ++i) {
submitThreads[i] = new Thread() {
@Override
public void run() {
for (int i = 0; i < nprocPerThread; ++i) {
try {
procExecutor.submitProcedure((Procedure)procClazz.newInstance());
} catch (InstantiationException|IllegalAccessException e) {
LOG.error("unable to instantiate the procedure", e);
fail("failure during the proc.newInstance(): " + e.getMessage());
}
}
}
};
}
for (int i = 0; i < submitThreads.length; ++i) {
submitThreads[i].start();
}
for (int i = 0; i < submitThreads.length; ++i) {
submitThreads[i].join();
}
}
private static class TestProcedureEnv {
private ArrayList<Long> execList = new ArrayList<Long>();
private boolean acquireLock = true;
public void setAcquireLock(boolean acquireLock) {
this.acquireLock = acquireLock;
}
public boolean canAcquireLock() {
return acquireLock;
}
public void addToExecList(final Procedure proc) {
execList.add(proc.getProcId());
}
public ArrayList<Long> getExecList() {
return execList;
}
public void assertSortedExecList() {
LOG.debug("EXEC LIST: " + execList);
for (int i = 1; i < execList.size(); ++i) {
assertTrue("exec list not sorted: " + execList.get(i-1) + " >= " + execList.get(i),
execList.get(i-1) < execList.get(i));
}
}
}
public static class TestSingleStepProcedure extends SequentialProcedure<TestProcedureEnv> {
public TestSingleStepProcedure() { }
@Override
protected Procedure[] execute(TestProcedureEnv env) {
LOG.debug("execute procedure " + this);
env.addToExecList(this);
return null;
}
protected boolean acquireLock(final TestProcedureEnv env) {
return env.canAcquireLock();
}
@Override
protected void rollback(TestProcedureEnv env) { }
@Override
protected boolean abort(TestProcedureEnv env) { return true; }
}
public static class TestTwoStepProcedure extends SequentialProcedure<TestProcedureEnv> {
public TestTwoStepProcedure() { }
@Override
protected Procedure[] execute(TestProcedureEnv env) {
LOG.debug("execute procedure " + this);
env.addToExecList(this);
return new Procedure[] { new TestSingleStepProcedure() };
}
protected boolean acquireLock(final TestProcedureEnv env) {
return true;
}
@Override
protected void rollback(TestProcedureEnv env) { }
@Override
protected boolean abort(TestProcedureEnv env) { return true; }
}
}

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hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/store/TestProcedureStoreTracker.java Normal file
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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2.store;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.procedure2.Procedure;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.apache.hadoop.hbase.testclassification.MasterTests;
import org.junit.Assert;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
@Category({MasterTests.class, SmallTests.class})
public class TestProcedureStoreTracker {
private static final Log LOG = LogFactory.getLog(TestProcedureStoreTracker.class);
static class TestProcedure extends Procedure<Void> {
public TestProcedure(long procId) {
setProcId(procId);
}
@Override
protected Procedure[] execute(Void env) { return null; }
@Override
protected void rollback(Void env) { /* no-op */ }
@Override
protected boolean abort(Void env) { return false; }
@Override
protected void serializeStateData(final OutputStream stream) { /* no-op */ }
@Override
protected void deserializeStateData(final InputStream stream) { /* no-op */ }
}
@Test
public void testSeqInsertAndDelete() {
ProcedureStoreTracker tracker = new ProcedureStoreTracker();
assertTrue(tracker.isEmpty());
final int MIN_PROC = 1;
final int MAX_PROC = 1 << 10;
// sequential insert
for (int i = MIN_PROC; i < MAX_PROC; ++i) {
tracker.insert(i);
// All the proc that we inserted should not be deleted
for (int j = MIN_PROC; j <= i; ++j) {
assertEquals(ProcedureStoreTracker.DeleteState.NO, tracker.isDeleted(j));
}
// All the proc that are not yet inserted should be result as deleted
for (int j = i + 1; j < MAX_PROC; ++j) {
assertTrue(tracker.isDeleted(j) != ProcedureStoreTracker.DeleteState.NO);
}
}
// sequential delete
for (int i = MIN_PROC; i < MAX_PROC; ++i) {
tracker.delete(i);
// All the proc that we deleted should be deleted
for (int j = MIN_PROC; j <= i; ++j) {
assertEquals(ProcedureStoreTracker.DeleteState.YES, tracker.isDeleted(j));
}
// All the proc that are not yet deleted should be result as not deleted
for (int j = i + 1; j < MAX_PROC; ++j) {
assertEquals(ProcedureStoreTracker.DeleteState.NO, tracker.isDeleted(j));
}
}
assertTrue(tracker.isEmpty());
}
@Test
public void testPartialTracker() {
ProcedureStoreTracker tracker = new ProcedureStoreTracker();
tracker.setPartialFlag(true);
// nothing in the tracker, the state is unknown
assertTrue(tracker.isEmpty());
assertEquals(ProcedureStoreTracker.DeleteState.MAYBE, tracker.isDeleted(1));
assertEquals(ProcedureStoreTracker.DeleteState.MAYBE, tracker.isDeleted(579));
// Mark 1 as deleted, now that is a known state
tracker.setDeleted(1, true);
tracker.dump();
assertEquals(ProcedureStoreTracker.DeleteState.YES, tracker.isDeleted(1));
assertEquals(ProcedureStoreTracker.DeleteState.MAYBE, tracker.isDeleted(2));
assertEquals(ProcedureStoreTracker.DeleteState.MAYBE, tracker.isDeleted(579));
// Mark 579 as non-deleted, now that is a known state
tracker.setDeleted(579, false);
assertEquals(ProcedureStoreTracker.DeleteState.YES, tracker.isDeleted(1));
assertEquals(ProcedureStoreTracker.DeleteState.MAYBE, tracker.isDeleted(2));
assertEquals(ProcedureStoreTracker.DeleteState.NO, tracker.isDeleted(579));
assertEquals(ProcedureStoreTracker.DeleteState.MAYBE, tracker.isDeleted(577));
assertEquals(ProcedureStoreTracker.DeleteState.MAYBE, tracker.isDeleted(580));
}
@Test
public void testBasicCRUD() {
ProcedureStoreTracker tracker = new ProcedureStoreTracker();
assertTrue(tracker.isEmpty());
Procedure[] procs = new TestProcedure[] {
new TestProcedure(1), new TestProcedure(2), new TestProcedure(3),
new TestProcedure(4), new TestProcedure(5), new TestProcedure(6),
};
tracker.insert(procs[0], null);
tracker.insert(procs[1], new Procedure[] { procs[2], procs[3], procs[4] });
assertFalse(tracker.isEmpty());
assertTrue(tracker.isUpdated());
tracker.resetUpdates();
assertFalse(tracker.isUpdated());
for (int i = 0; i < 4; ++i) {
tracker.update(procs[i]);
assertFalse(tracker.isEmpty());
assertFalse(tracker.isUpdated());
}
tracker.update(procs[4]);
assertFalse(tracker.isEmpty());
assertTrue(tracker.isUpdated());
tracker.update(procs[5]);
assertFalse(tracker.isEmpty());
assertTrue(tracker.isUpdated());
for (int i = 0; i < 5; ++i) {
tracker.delete(procs[i].getProcId());
assertFalse(tracker.isEmpty());
assertTrue(tracker.isUpdated());
}
tracker.delete(procs[5].getProcId());
assertTrue(tracker.isEmpty());
}
}

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hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/store/wal/TestWALProcedureStore.java Normal file
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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2.store.wal;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Iterator;
import java.util.HashSet;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseCommonTestingUtility;
import org.apache.hadoop.hbase.procedure2.Procedure;
import org.apache.hadoop.hbase.procedure2.ProcedureTestingUtility;
import org.apache.hadoop.hbase.procedure2.SequentialProcedure;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.apache.hadoop.hbase.testclassification.MasterTests;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.io.IOUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Assert;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
@Category({MasterTests.class, SmallTests.class})
public class TestWALProcedureStore {
private static final Log LOG = LogFactory.getLog(TestWALProcedureStore.class);
private static final int PROCEDURE_STORE_SLOTS = 1;
private static final Procedure NULL_PROC = null;
private WALProcedureStore procStore;
private HBaseCommonTestingUtility htu;
private FileSystem fs;
private Path testDir;
private Path logDir;
@Before
public void setUp() throws IOException {
htu = new HBaseCommonTestingUtility();
testDir = htu.getDataTestDir();
fs = testDir.getFileSystem(htu.getConfiguration());
assertTrue(testDir.depth() > 1);
logDir = new Path(testDir, "proc-logs");
procStore = ProcedureTestingUtility.createWalStore(htu.getConfiguration(), fs, logDir);
procStore.start(PROCEDURE_STORE_SLOTS);
procStore.recoverLease();
}
@After
public void tearDown() throws IOException {
procStore.stop(false);
fs.delete(logDir, true);
}
private Iterator<Procedure> storeRestart() throws Exception {
procStore.stop(false);
procStore.start(PROCEDURE_STORE_SLOTS);
procStore.recoverLease();
return procStore.load();
}
@Test
public void testEmptyLogLoad() throws Exception {
Iterator<Procedure> loader = storeRestart();
assertEquals(0, countProcedures(loader));
}
@Test
public void testLoad() throws Exception {
Set<Long> procIds = new HashSet<>();
// Insert something in the log
Procedure proc1 = new TestSequentialProcedure();
procIds.add(proc1.getProcId());
procStore.insert(proc1, null);
Procedure proc2 = new TestSequentialProcedure();
Procedure[] child2 = new Procedure[2];
child2[0] = new TestSequentialProcedure();
child2[1] = new TestSequentialProcedure();
procIds.add(proc2.getProcId());
procIds.add(child2[0].getProcId());
procIds.add(child2[1].getProcId());
procStore.insert(proc2, child2);
// Verify that everything is there
verifyProcIdsOnRestart(procIds);
// Update and delete something
procStore.update(proc1);
procStore.update(child2[1]);
procStore.delete(child2[1].getProcId());
procIds.remove(child2[1].getProcId());
// Verify that everything is there
verifyProcIdsOnRestart(procIds);
// Remove 4 byte from the trailers
procStore.stop(false);
FileStatus[] logs = fs.listStatus(logDir);
assertEquals(3, logs.length);
for (int i = 0; i < logs.length; ++i) {
corruptLog(logs[i], 4);
}
verifyProcIdsOnRestart(procIds);
}
@Test
public void testCorruptedTrailer() throws Exception {
// Insert something
for (int i = 0; i < 100; ++i) {
procStore.insert(new TestSequentialProcedure(), null);
}
// Stop the store
procStore.stop(false);
// Remove 4 byte from the trailer
FileStatus[] logs = fs.listStatus(logDir);
assertEquals(1, logs.length);
corruptLog(logs[0], 4);
int count = countProcedures(storeRestart());
assertEquals(100, count);
}
@Test
public void testCorruptedEntries() throws Exception {
// Insert something
for (int i = 0; i < 100; ++i) {
procStore.insert(new TestSequentialProcedure(), null);
}
// Stop the store
procStore.stop(false);
// Remove some byte from the log
// (enough to cut the trailer and corrupt some entries)
FileStatus[] logs = fs.listStatus(logDir);
assertEquals(1, logs.length);
corruptLog(logs[0], 1823);
int count = countProcedures(storeRestart());
assertTrue(procStore.getCorruptedLogs() != null);
assertEquals(1, procStore.getCorruptedLogs().size());
assertEquals(85, count);
}
private void corruptLog(final FileStatus logFile, final long dropBytes)
throws IOException {
assertTrue(logFile.getLen() > dropBytes);
LOG.debug("corrupt log " + logFile.getPath() +
" size=" + logFile.getLen() + " drop=" + dropBytes);
Path tmpPath = new Path(testDir, "corrupted.log");
InputStream in = fs.open(logFile.getPath());
OutputStream out = fs.create(tmpPath);
IOUtils.copyBytes(in, out, logFile.getLen() - dropBytes, true);
fs.rename(tmpPath, logFile.getPath());
}
private void verifyProcIdsOnRestart(final Set<Long> procIds) throws Exception {
int count = 0;
Iterator<Procedure> loader = storeRestart();
while (loader.hasNext()) {
Procedure proc = loader.next();
LOG.debug("loading procId=" + proc.getProcId());
assertTrue("procId=" + proc.getProcId() + " unexpected", procIds.contains(proc.getProcId()));
count++;
}
assertEquals(procIds.size(), count);
}
private void assertIsEmpty(Iterator<Procedure> iterator) {
assertEquals(0, countProcedures(iterator));
}
private int countProcedures(Iterator<Procedure> iterator) {
int count = 0;
while (iterator.hasNext()) {
Procedure proc = iterator.next();
LOG.trace("loading procId=" + proc.getProcId());
count++;
}
return count;
}
private void assertEmptyLogDir() {
try {
FileStatus[] status = fs.listStatus(logDir);
assertTrue("expected empty state-log dir", status == null || status.length == 0);
} catch (FileNotFoundException e) {
fail("expected the state-log dir to be present: " + logDir);
} catch (IOException e) {
fail("got en exception on state-log dir list: " + e.getMessage());
}
}
public static class TestSequentialProcedure extends SequentialProcedure<Void> {
private static long seqid = 0;
public TestSequentialProcedure() {
setProcId(++seqid);
}
@Override
protected Procedure[] execute(Void env) { return null; }
@Override
protected void rollback(Void env) { }
@Override
protected boolean abort(Void env) { return false; }
@Override
protected void serializeStateData(final OutputStream stream) throws IOException {
long procId = getProcId();
if (procId % 2 == 0) {
stream.write(Bytes.toBytes(procId));
}
}
@Override
protected void deserializeStateData(InputStream stream) throws IOException {
long procId = getProcId();
if (procId % 2 == 0) {
byte[] bProcId = new byte[8];
assertEquals(8, stream.read(bProcId));
assertEquals(procId, Bytes.toLong(bProcId));
} else {
assertEquals(0, stream.available());
}
}
}
}

137
hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/util/TestTimeoutBlockingQueue.java Normal file
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@ -0,0 +1,137 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.procedure2.util;
import java.util.Arrays;
import java.util.concurrent.TimeUnit;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.procedure2.util.TimeoutBlockingQueue.TimeoutRetriever;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.apache.hadoop.hbase.testclassification.MasterTests;
import org.junit.Assert;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
@Category({MasterTests.class, SmallTests.class})
public class TestTimeoutBlockingQueue {
private static final Log LOG = LogFactory.getLog(TestTimeoutBlockingQueue.class);
static class TestObject {
private long timeout;
private int seqId;
public TestObject(int seqId, long timeout) {
this.timeout = timeout;
this.seqId = seqId;
}
public long getTimeout() {
return timeout;
}
public String toString() {
return String.format("(%03d, %03d)", seqId, timeout);
}
}
static class TestObjectTimeoutRetriever implements TimeoutRetriever<TestObject> {
@Override
public long getTimeout(TestObject obj) {
return obj.getTimeout();
}
@Override
public TimeUnit getTimeUnit(TestObject obj) {
return TimeUnit.MILLISECONDS;
}
}
@Test
public void testOrder() {
TimeoutBlockingQueue<TestObject> queue =
new TimeoutBlockingQueue<TestObject>(8, new TestObjectTimeoutRetriever());
long[] timeouts = new long[] {500, 200, 700, 300, 600, 600, 200, 800, 500};
for (int i = 0; i < timeouts.length; ++i) {
for (int j = 0; j <= i; ++j) {
queue.add(new TestObject(j, timeouts[j]));
queue.dump();
}
long prev = 0;
for (int j = 0; j <= i; ++j) {
TestObject obj = queue.poll();
assertTrue(obj.getTimeout() >= prev);
prev = obj.getTimeout();
queue.dump();
}
}
}
@Test
public void testTimeoutBlockingQueue() {
TimeoutBlockingQueue<TestObject> queue;
int[][] testArray = new int[][] {
{200, 400, 600}, // append
{200, 400, 100}, // prepend
{200, 400, 300}, // insert
};
for (int i = 0; i < testArray.length; ++i) {
int[] sortedArray = Arrays.copyOf(testArray[i], testArray[i].length);
Arrays.sort(sortedArray);
// test with head == 0
queue = new TimeoutBlockingQueue<TestObject>(2, new TestObjectTimeoutRetriever());
for (int j = 0; j < testArray[i].length; ++j) {
queue.add(new TestObject(j, testArray[i][j]));
queue.dump();
}
for (int j = 0; !queue.isEmpty(); ++j) {
assertEquals(sortedArray[j], queue.poll().getTimeout());
}
queue = new TimeoutBlockingQueue<TestObject>(2, new TestObjectTimeoutRetriever());
queue.add(new TestObject(0, 50));
assertEquals(50, queue.poll().getTimeout());
// test with head > 0
for (int j = 0; j < testArray[i].length; ++j) {
queue.add(new TestObject(j, testArray[i][j]));
queue.dump();
}
for (int j = 0; !queue.isEmpty(); ++j) {
assertEquals(sortedArray[j], queue.poll().getTimeout());
}
}
}
}

1
hbase-protocol/pom.xml
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@ -176,6 +176,7 @@
<include>MapReduce.proto</include>
<include>Master.proto</include>
<include>MultiRowMutation.proto</include>
<include>Procedure.proto</include>
<include>Quota.proto</include>
<include>RegionServerStatus.proto</include>
<include>RowProcessor.proto</include>

7219
hbase-protocol/src/main/java/org/apache/hadoop/hbase/protobuf/generated/ProcedureProtos.java Normal file
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File diff suppressed because it is too large Load Diff

114
hbase-protocol/src/main/protobuf/Procedure.proto Normal file
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@ -0,0 +1,114 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
option java_package = "org.apache.hadoop.hbase.protobuf.generated";
option java_outer_classname = "ProcedureProtos";
option java_generic_services = true;
option java_generate_equals_and_hash = true;
option optimize_for = SPEED;
import "ErrorHandling.proto";
enum ProcedureState {
INITIALIZING = 1; // Procedure in construction, not yet added to the executor
RUNNABLE = 2; // Procedure added to the executor, and ready to be executed
WAITING = 3; // The procedure is waiting on children to be completed
WAITING_TIMEOUT = 4; // The procedure is waiting a timout or an external event
ROLLEDBACK = 5; // The procedure failed and was rolledback
FINISHED = 6; // The procedure execution is completed. may need a rollback if failed.
}
/**
* Procedure metadata, serialized by the ProcedureStore to be able to recover the old state.
*/
message Procedure {
// internal "static" state
required string class_name = 1; // full classname to be able to instantiate the procedure
optional uint64 parent_id = 2; // parent if not a root-procedure otherwise not set
required uint64 proc_id = 3;
required uint64 start_time = 4;
optional string owner = 5;
// internal "runtime" state
required ProcedureState state = 6;
repeated uint32 stack_id = 7; // stack indices in case the procedure was running
required uint64 last_update = 8;
optional uint32 timeout = 9;
// user state/results
optional ForeignExceptionMessage exception = 10;
optional bytes result = 11; // opaque (user) result structure
optional bytes state_data = 12; // opaque (user) procedure internal-state
}
/**
* SequentialProcedure data
*/
message SequentialProcedureData {
required bool executed = 1;
}
/**
* StateMachineProcedure data
*/
message StateMachineProcedureData {
repeated uint32 state = 1;
}
/**
* Procedure WAL header
*/
message ProcedureWALHeader {
required uint32 version = 1;
required uint32 type = 2;
required uint64 log_id = 3;
required uint64 min_proc_id = 4;
}
/**
* Procedure WAL trailer
*/
message ProcedureWALTrailer {
required uint32 version = 1;
required uint64 tracker_pos = 2;
}
message ProcedureStoreTracker {
message TrackerNode {
required uint64 start_id = 1;
repeated uint64 updated = 2;
repeated uint64 deleted = 3;
}
repeated TrackerNode node = 1;
}
message ProcedureWALEntry {
enum Type {
EOF = 1;
INIT = 2;
INSERT = 3;
UPDATE = 4;
DELETE = 5;
COMPACT = 6;
}
required Type type = 1;
repeated Procedure procedure = 2;
optional uint64 proc_id = 3;
}

21
pom.xml
View File

@ -56,6 +56,7 @@
<module>hbase-client</module>
<module>hbase-hadoop-compat</module>
<module>hbase-common</module>
<module>hbase-procedure</module>
<module>hbase-it</module>
<module>hbase-examples</module>
<module>hbase-prefix-tree</module>
@ -871,7 +872,7 @@
</fileMapper>
</fileMappers>
<outputDir>${basedir}/target/asciidoc</outputDir>
</transformationSet>
</transformationSet>
</transformationSets>
</configuration>
</plugin>
@ -1014,7 +1015,7 @@
<plugin>
<groupId>org.asciidoctor</groupId>
<artifactId>asciidoctor-maven-plugin</artifactId>
<version>1.5.2</version>
<version>1.5.2</version>
<inherited>false</inherited>
<dependencies>
<dependency>
@ -1034,10 +1035,10 @@
</configuration>
<executions>
<execution>
<id>output-html</id>
<id>output-html</id>
<phase>site</phase>
<goals>
<goal>process-asciidoc</goal>
<goal>process-asciidoc</goal>
</goals>
<configuration>
<attributes>
@ -1191,6 +1192,7 @@
Modules are pretty heavy-weight things, so doing this work isn't too bad. -->
<server.test.jar>hbase-server-${project.version}-tests.jar</server.test.jar>
<common.test.jar>hbase-common-${project.version}-tests.jar</common.test.jar>
<procedure.test.jar>hbase-procedure-${project.version}-tests.jar</procedure.test.jar>
<it.test.jar>hbase-it-${project.version}-tests.jar</it.test.jar>
<annotations.test.jar>hbase-annotations-${project.version}-tests.jar</annotations.test.jar>
<surefire.version>2.18</surefire.version>
@ -1260,6 +1262,17 @@
<artifactId>hbase-protocol</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-procedure</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-procedure</artifactId>
<version>${project.version}</version>
<type>test-jar</type>
</dependency>
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-hadoop-compat</artifactId>