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HDDS-709. Modify Close Container handling sequence on datanodes. Contributed by Shashikant Banerjee.

This commit is contained in:
Jitendra Pandey 2018-11-12 14:08:39 -08:00
parent 1f9c4f32e8
commit f944f33832
13 changed files with 255 additions and 39 deletions
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36
hadoop-hdds/common/src/main/java/org/apache/hadoop/hdds/scm/container/common/helpers/ContainerNotOpenException.java Normal file
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@ -0,0 +1,36 @@
/*
* 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.hdds.scm.container.common.helpers;
import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos;
/**
* Exceptions thrown when a write/update opearation is done on non-open
* container.
*/
public class ContainerNotOpenException extends StorageContainerException {
/**
* Constructs an {@code IOException} with the specified detail message.
*
* @param message The detail message (which is saved for later retrieval by
* the {@link #getMessage()} method)
*/
public ContainerNotOpenException(String message) {
super(message, ContainerProtos.Result.CONTAINER_NOT_OPEN);
}
}

35
hadoop-hdds/common/src/main/java/org/apache/hadoop/hdds/scm/container/common/helpers/InvalidContainerStateException.java Normal file
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@ -0,0 +1,35 @@
/*
* 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.hdds.scm.container.common.helpers;
import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos;
/**
* Exceptions thrown when a container is in invalid state while doing a I/O.
*/
public class InvalidContainerStateException extends StorageContainerException {
/**
* Constructs an {@code IOException} with the specified detail message.
*
* @param message The detail message (which is saved for later retrieval by
* the {@link #getMessage()} method)
*/
public InvalidContainerStateException(String message) {
super(message, ContainerProtos.Result.INVALID_CONTAINER_STATE);
}
}

1
hadoop-hdds/common/src/main/proto/DatanodeContainerProtocol.proto
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@ -142,6 +142,7 @@ enum Result {
CONTAINER_UNHEALTHY = 36;
UNKNOWN_BCSID = 37;
BCSID_MISMATCH = 38;
CONTAINER_NOT_OPEN = 39;
}
/**

100
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/impl/HddsDispatcher.java
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@ -28,6 +28,8 @@
.ContainerDataProto;
import org.apache.hadoop.hdds.protocol.proto
.StorageContainerDatanodeProtocolProtos.ContainerAction;
import org.apache.hadoop.hdds.scm.container.common.helpers.ContainerNotOpenException;
import org.apache.hadoop.hdds.scm.container.common.helpers.InvalidContainerStateException;
import org.apache.hadoop.hdds.scm.container.common.helpers.StorageContainerException;
import org.apache.hadoop.ozone.container.common.helpers.ContainerMetrics;
import org.apache.hadoop.ozone.container.common.helpers.ContainerUtils;
@ -42,6 +44,9 @@
.ContainerCommandResponseProto;
import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos
.ContainerType;
import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos.
ContainerDataProto.State;
import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos.Result;
import org.apache.hadoop.ozone.container.common.interfaces.ContainerDispatcher;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@ -99,6 +104,25 @@ public void shutdown() {
volumeSet.shutdown();
}
/**
* Returns true for exceptions which can be ignored for marking the container
* unhealthy.
* @param result ContainerCommandResponse error code.
* @return true if exception can be ignored, false otherwise.
*/
private boolean canIgnoreException(Result result) {
switch (result) {
case SUCCESS:
case CONTAINER_UNHEALTHY:
case CLOSED_CONTAINER_IO:
case DELETE_ON_OPEN_CONTAINER:
case ERROR_CONTAINER_NOT_EMPTY:
return true;
default:
return false;
}
}
@Override
public ContainerCommandResponseProto dispatch(
ContainerCommandRequestProto msg) {
@ -160,20 +184,31 @@ public ContainerCommandResponseProto dispatch(
// failed. All subsequent transactions on the container should fail and
// hence replica will be marked unhealthy here. In this case, a close
// container action will be sent to SCM to close the container.
if (!HddsUtils.isReadOnly(msg)
&& responseProto.getResult() != ContainerProtos.Result.SUCCESS) {
// If the container is open and the container operation has failed,
// it should be first marked unhealthy and the initiate the close
// container action. This also implies this is the first transaction
// which has failed, so the container is marked unhealthy right here.
// ApplyTransaction called on closed Container will fail with Closed
// container exception. In such cases, ignore the exception here
// If the container is already marked unhealthy, no need to change the
// state here.
Result result = responseProto.getResult();
if (!HddsUtils.isReadOnly(msg) && !canIgnoreException(result)) {
// If the container is open/closing and the container operation
// has failed, it should be first marked unhealthy and the initiate the
// close container action. This also implies this is the first
// transaction which has failed, so the container is marked unhealthy
// right here.
// Once container is marked unhealthy, all the subsequent write
// transactions will fail with UNHEALTHY_CONTAINER exception.
if (container.getContainerState() == ContainerDataProto.State.OPEN) {
// For container to be moved to unhealthy state here, the container can
// only be in open or closing state.
State containerState = container.getContainerData().getState();
Preconditions.checkState(
containerState == State.OPEN || containerState == State.CLOSING);
container.getContainerData()
.setState(ContainerDataProto.State.UNHEALTHY);
sendCloseContainerActionIfNeeded(container);
}
}
return responseProto;
} else {
return ContainerUtils.unsupportedRequest(msg);
@ -206,6 +241,54 @@ private void createContainer(ContainerCommandRequestProto containerRequest) {
handler.handle(requestBuilder.build(), null);
}
/**
* This will be called as a part of creating the log entry during
* startTransaction in Ratis on the leader node. In such cases, if the
* container is not in open state for writing we should just fail.
* Leader will propagate the exception to client.
* @param msg container command proto
* @throws StorageContainerException In case container state is open for write
* requests and in invalid state for read requests.
*/
@Override
public void validateContainerCommand(
ContainerCommandRequestProto msg) throws StorageContainerException {
ContainerType containerType = msg.getCreateContainer().getContainerType();
Handler handler = getHandler(containerType);
if (handler == null) {
StorageContainerException ex = new StorageContainerException(
"Invalid " + "ContainerType " + containerType,
ContainerProtos.Result.CONTAINER_INTERNAL_ERROR);
throw ex;
}
ContainerProtos.Type cmdType = msg.getCmdType();
long containerID = msg.getContainerID();
Container container;
container = getContainer(containerID);
if (container != null) {
State containerState = container.getContainerState();
if (!HddsUtils.isReadOnly(msg) && containerState != State.OPEN) {
switch (cmdType) {
case CreateContainer:
// Create Container is idempotent. There is nothing to validate.
break;
case CloseContainer:
// If the container is unhealthy, closeContainer will be rejected
// while execution. Nothing to validate here.
break;
default:
// if the container is not open, no updates can happen. Just throw
// an exception
throw new ContainerNotOpenException(
"Container " + containerID + " in " + containerState + " state");
}
} else if (HddsUtils.isReadOnly(msg) && containerState == State.INVALID) {
throw new InvalidContainerStateException(
"Container " + containerID + " in " + containerState + " state");
}
}
}
/**
* If the container usage reaches the close threshold or the container is
* marked unhealthy we send Close ContainerAction to SCM.
@ -264,7 +347,6 @@ public void setScmId(String scmId) {
}
}
@VisibleForTesting
public Container getContainer(long containerID) {
return containerSet.getContainer(containerID);
}

10
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/interfaces/ContainerDispatcher.java
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@ -23,6 +23,7 @@
.ContainerCommandRequestProto;
import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos
.ContainerCommandResponseProto;
import org.apache.hadoop.hdds.scm.container.common.helpers.StorageContainerException;
/**
* Dispatcher acts as the bridge between the transport layer and
@ -40,6 +41,15 @@ public interface ContainerDispatcher {
*/
ContainerCommandResponseProto dispatch(ContainerCommandRequestProto msg);
/**
* Validates whether the container command should be executed on the pipeline
* or not. Will be invoked by the leader node in the Ratis pipeline
* @param msg containerCommand
* @throws StorageContainerException
*/
void validateContainerCommand(
ContainerCommandRequestProto msg) throws StorageContainerException;
/**
* Initialize the Dispatcher.
*/

28
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/statemachine/commandhandler/CloseContainerCommandHandler.java
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@ -24,6 +24,9 @@
.StorageContainerDatanodeProtocolProtos.SCMCommandProto;
import org.apache.hadoop.hdds.protocol.proto
.StorageContainerDatanodeProtocolProtos.CloseContainerCommandProto;
import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos.
ContainerDataProto.State;
import org.apache.hadoop.ozone.container.common.impl.ContainerData;
import org.apache.hadoop.ozone.container.common.interfaces.Container;
import org.apache.hadoop.ozone.container.common.statemachine
.SCMConnectionManager;
@ -84,8 +87,18 @@ public void handle(SCMCommand command, OzoneContainer ozoneContainer,
cmdExecuted = false;
return;
}
if (!container.getContainerData().isClosed()) {
ContainerData containerData = container.getContainerData();
State containerState = container.getContainerData().getState();
if (containerState != State.CLOSED) {
LOG.debug("Closing container {}.", containerID);
// when a closeContainerCommand arrives at a Datanode and if the
// container is open, each replica will be moved to closing state first.
if (containerState == State.OPEN) {
containerData.setState(State.CLOSING);
}
// if the container is already closed, it will be just ignored.
// ICR will get triggered to change the replica state in SCM.
HddsProtos.PipelineID pipelineID = closeContainerProto.getPipelineID();
HddsProtos.ReplicationType replicationType =
closeContainerProto.getReplicationType();
@ -100,14 +113,13 @@ public void handle(SCMCommand command, OzoneContainer ozoneContainer,
request.setDatanodeUuid(
context.getParent().getDatanodeDetails().getUuidString());
// submit the close container request for the XceiverServer to handle
ozoneContainer.submitContainerRequest(
request.build(), replicationType, pipelineID);
ozoneContainer.submitContainerRequest(request.build(), replicationType,
pipelineID);
// Since the container is closed, we trigger an ICR
IncrementalContainerReportProto icr = IncrementalContainerReportProto
.newBuilder()
.addReport(ozoneContainer.getContainerSet()
.getContainer(containerID).getContainerReport())
.build();
IncrementalContainerReportProto icr =
IncrementalContainerReportProto.newBuilder().addReport(
ozoneContainer.getContainerSet().getContainer(containerID)
.getContainerReport()).build();
context.addReport(icr);
context.getParent().triggerHeartbeat();
}

11
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/transport/server/ratis/ContainerStateMachine.java
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@ -205,6 +205,17 @@ public TransactionContext startTransaction(RaftClientRequest request)
final ContainerCommandRequestProto proto =
getRequestProto(request.getMessage().getContent());
Preconditions.checkArgument(request.getRaftGroupId().equals(gid));
try {
dispatcher.validateContainerCommand(proto);
} catch (IOException ioe) {
TransactionContext ctxt = TransactionContext.newBuilder()
.setClientRequest(request)
.setStateMachine(this)
.setServerRole(RaftPeerRole.LEADER)
.build();
ctxt.setException(ioe);
return ctxt;
}
if (proto.getCmdType() == Type.WriteChunk) {
final WriteChunkRequestProto write = proto.getWriteChunk();
// create the state machine data proto

33
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/keyvalue/KeyValueHandler.java
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@ -386,28 +386,26 @@ ContainerCommandResponseProto handleCloseContainer(
}
long containerID = kvContainer.getContainerData().getContainerID();
ContainerDataProto.State containerState = kvContainer.getContainerState();
try {
if (containerState == ContainerDataProto.State .CLOSED) {
LOG.debug("Container {} is already closed.", containerID);
return ContainerUtils.getSuccessResponse(request);
} else if (containerState == ContainerDataProto.State .INVALID) {
LOG.debug("Invalid container data. ContainerID: {}", containerID);
throw new StorageContainerException("Invalid container data. " +
"ContainerID: " + containerID, INVALID_CONTAINER_STATE);
}
checkContainerOpen(kvContainer);
KeyValueContainerData kvData = kvContainer.getContainerData();
// remove the container from open block map once, all the blocks
// have been committed and the container is closed
kvData.setState(ContainerDataProto.State.CLOSING);
commitPendingBlocks(kvContainer);
// TODO : The close command should move the container to either quasi
// closed/closed depending upon how the closeContainer gets executed.
// If it arrives by Standalone, it will be moved to Quasi Closed or
// otherwise moved to Closed state if it gets executed via Ratis.
kvContainer.close();
// make sure the the container open keys from BlockMap gets removed
openContainerBlockMap.removeContainer(kvData.getContainerID());
} catch (StorageContainerException ex) {
if (ex.getResult() == CLOSED_CONTAINER_IO) {
LOG.debug("Container {} is already closed.", containerID);
return ContainerUtils.getSuccessResponse(request);
}
return ContainerUtils.logAndReturnError(LOG, ex, request);
} catch (IOException ex) {
return ContainerUtils.logAndReturnError(LOG,
@ -799,14 +797,21 @@ private void checkContainerOpen(KeyValueContainer kvContainer)
ContainerDataProto.State containerState = kvContainer.getContainerState();
if (containerState == ContainerDataProto.State.OPEN) {
/**
* In a closing state, follower will receive transactions from leader.
* Once the leader is put to closing state, it will reject further requests
* from clients. Only the transactions which happened before the container
* in the leader goes to closing state, will arrive here even the container
* might already be in closing state here.
*/
if (containerState == ContainerDataProto.State.OPEN
|| containerState == ContainerDataProto.State.CLOSING) {
return;
} else {
String msg = "Requested operation not allowed as ContainerState is " +
containerState;
ContainerProtos.Result result = null;
switch (containerState) {
case CLOSING:
case CLOSED:
result = CLOSED_CONTAINER_IO;
break;

14
hadoop-ozone/client/src/main/java/org/apache/hadoop/ozone/client/io/ChunkGroupOutputStream.java
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@ -22,6 +22,7 @@
import org.apache.hadoop.fs.FSExceptionMessages;
import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos.Result;
import org.apache.hadoop.hdds.client.BlockID;
import org.apache.hadoop.hdds.scm.container.common.helpers.ContainerNotOpenException;
import org.apache.hadoop.hdds.scm.container.common.helpers.ContainerWithPipeline;
import org.apache.hadoop.io.retry.RetryPolicy;
import org.apache.hadoop.ozone.om.helpers.OmKeyLocationInfoGroup;
@ -429,13 +430,24 @@ private void handleCloseContainerException(ChunkOutputStreamEntry streamEntry,
}
private boolean checkIfContainerIsClosed(IOException ioe) {
return Optional.of(ioe.getCause())
return checkIfContainerNotOpenException(ioe) || Optional.of(ioe.getCause())
.filter(e -> e instanceof StorageContainerException)
.map(e -> (StorageContainerException) e)
.filter(sce -> sce.getResult() == Result.CLOSED_CONTAINER_IO)
.isPresent();
}
private boolean checkIfContainerNotOpenException(IOException ioe) {
Throwable t = ioe.getCause();
while (t != null) {
if (t instanceof ContainerNotOpenException) {
return true;
}
t = t.getCause();
}
return false;
}
private long getKeyLength() {
return streamEntries.parallelStream().mapToLong(e -> e.currentPosition)
.sum();

2
hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/client/rpc/TestCloseContainerHandlingByClient.java
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@ -559,7 +559,7 @@ public void testRetriesOnBlockNotCommittedException() throws Exception {
if (datanodes.get(0).equals(datanodeService.getDatanodeDetails())) {
datanodeService.getDatanodeStateMachine().getContainer()
.getContainerSet().getContainer(containerID).getContainerData()
.setState(ContainerProtos.ContainerDataProto.State.CLOSING);
.setState(ContainerProtos.ContainerDataProto.State.CLOSED);
}
}
dataString = fixedLengthString(keyString, (chunkSize * 1 / 2));

6
hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/client/rpc/TestContainerStateMachineFailures.java
View File

@ -162,9 +162,9 @@ public void testContainerStateMachineFailures() throws Exception {
key.close();
Assert.fail("Expected exception not thrown");
} catch (IOException ioe) {
Assert.assertTrue(ioe.getCause() instanceof StorageContainerException);
Assert.assertTrue(((StorageContainerException) ioe.getCause()).getResult()
== ContainerProtos.Result.CONTAINER_UNHEALTHY);
Assert.assertTrue(ioe instanceof StorageContainerException);
Assert.assertTrue(((StorageContainerException) ioe).getResult()
== ContainerProtos.Result.BLOCK_NOT_COMMITTED);
}
}
}

6
hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/container/common/transport/server/ratis/TestCSMMetrics.java
View File

@ -33,6 +33,7 @@
import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos
.ContainerCommandResponseProto;
import org.apache.hadoop.hdds.scm.*;
import org.apache.hadoop.hdds.scm.container.common.helpers.StorageContainerException;
import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
import org.apache.hadoop.metrics2.MetricsRecordBuilder;
import org.apache.hadoop.ozone.OzoneConfigKeys;
@ -172,6 +173,11 @@ public ContainerCommandResponseProto dispatch(
return ContainerTestHelper.getCreateContainerResponse(msg);
}
@Override
public void validateContainerCommand(
ContainerCommandRequestProto msg) throws StorageContainerException {
}
@Override
public void init() {
}

6
hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/container/server/TestContainerServer.java
View File

@ -18,6 +18,7 @@
package org.apache.hadoop.ozone.container.server;
import org.apache.hadoop.hdds.scm.container.common.helpers.StorageContainerException;
import org.apache.hadoop.ozone.container.common.impl.ContainerSet;
import org.apache.hadoop.ozone.container.common.impl.HddsDispatcher;
import org.apache.hadoop.ozone.container.common.interfaces.Handler;
@ -228,6 +229,11 @@ private static class TestContainerDispatcher implements ContainerDispatcher {
public void init() {
}
@Override
public void validateContainerCommand(
ContainerCommandRequestProto msg) throws StorageContainerException {
}
@Override
public void shutdown() {
}