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HDFS-14655. [SBN Read] Namenode crashes if one of The JN is down. Contributed by Ayush Saxena.

This commit is contained in:
Ayush Saxena 2019-09-25 01:16:30 +05:30
parent a1fa9a8a7f
commit a0db762206
7 changed files with 78 additions and 9 deletions
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5
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
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@ -1123,6 +1123,8 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
public static final String DFS_QJOURNAL_WRITE_TXNS_TIMEOUT_KEY = "dfs.qjournal.write-txns.timeout.ms";
public static final String DFS_QJOURNAL_HTTP_OPEN_TIMEOUT_KEY = "dfs.qjournal.http.open.timeout.ms";
public static final String DFS_QJOURNAL_HTTP_READ_TIMEOUT_KEY = "dfs.qjournal.http.read.timeout.ms";
public static final String DFS_QJOURNAL_PARALLEL_READ_NUM_THREADS_KEY =
"dfs.qjournal.parallel-read.num-threads";
public static final int DFS_QJOURNAL_START_SEGMENT_TIMEOUT_DEFAULT = 20000;
public static final int DFS_QJOURNAL_PREPARE_RECOVERY_TIMEOUT_DEFAULT = 120000;
public static final int DFS_QJOURNAL_ACCEPT_RECOVERY_TIMEOUT_DEFAULT = 120000;
@ -1133,7 +1135,8 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
public static final int DFS_QJOURNAL_WRITE_TXNS_TIMEOUT_DEFAULT = 20000;
public static final int DFS_QJOURNAL_HTTP_OPEN_TIMEOUT_DEFAULT = URLConnectionFactory.DEFAULT_SOCKET_TIMEOUT;
public static final int DFS_QJOURNAL_HTTP_READ_TIMEOUT_DEFAULT = URLConnectionFactory.DEFAULT_SOCKET_TIMEOUT;
public static final int DFS_QJOURNAL_PARALLEL_READ_NUM_THREADS_DEFAULT = 5;
public static final String DFS_MAX_NUM_BLOCKS_TO_LOG_KEY = "dfs.namenode.max-num-blocks-to-log";
public static final long DFS_MAX_NUM_BLOCKS_TO_LOG_DEFAULT = 1000l;

14
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/client/IPCLoggerChannel.java
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@ -27,6 +27,7 @@ import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;
import org.apache.hadoop.classification.InterfaceAudience;
@ -54,6 +55,7 @@ import org.apache.hadoop.ipc.ProtobufRpcEngine;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.security.SecurityUtil;
import org.apache.hadoop.util.StopWatch;
import org.apache.hadoop.util.concurrent.HadoopThreadPoolExecutor;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
@ -270,12 +272,14 @@ public class IPCLoggerChannel implements AsyncLogger {
*/
@VisibleForTesting
protected ExecutorService createParallelExecutor() {
return Executors.newCachedThreadPool(
new ThreadFactoryBuilder()
.setDaemon(true)
int numThreads =
conf.getInt(DFSConfigKeys.DFS_QJOURNAL_PARALLEL_READ_NUM_THREADS_KEY,
DFSConfigKeys.DFS_QJOURNAL_PARALLEL_READ_NUM_THREADS_DEFAULT);
return new HadoopThreadPoolExecutor(1, numThreads, 60L,
TimeUnit.SECONDS, new LinkedBlockingQueue<>(),
new ThreadFactoryBuilder().setDaemon(true)
.setNameFormat("Logger channel (from parallel executor) to " + addr)
.setUncaughtExceptionHandler(
UncaughtExceptionHandlers.systemExit())
.setUncaughtExceptionHandler(UncaughtExceptionHandlers.systemExit())
.build());
}

18
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/client/QuorumCall.java
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@ -17,6 +17,8 @@
*/
package org.apache.hadoop.hdfs.qjournal.client;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.TimeoutException;
@ -64,6 +66,7 @@ class QuorumCall<KEY, RESULT> {
private static final float WAIT_PROGRESS_WARN_THRESHOLD = 0.7f;
private final StopWatch quorumStopWatch;
private final Timer timer;
private final List<ListenableFuture<RESULT>> allCalls;
static <KEY, RESULT> QuorumCall<KEY, RESULT> create(
Map<KEY, ? extends ListenableFuture<RESULT>> calls, Timer timer) {
@ -71,6 +74,7 @@ class QuorumCall<KEY, RESULT> {
for (final Entry<KEY, ? extends ListenableFuture<RESULT>> e : calls.entrySet()) {
Preconditions.checkArgument(e.getValue() != null,
"null future for key: " + e.getKey());
qr.addCall(e.getValue());
Futures.addCallback(e.getValue(), new FutureCallback<RESULT>() {
@Override
public void onFailure(Throwable t) {
@ -102,6 +106,11 @@ class QuorumCall<KEY, RESULT> {
// Only instantiated from factory method above
this.timer = timer;
this.quorumStopWatch = new StopWatch(timer);
this.allCalls = new ArrayList<>();
}
private void addCall(ListenableFuture<RESULT> call) {
allCalls.add(call);
}
/**
@ -211,6 +220,15 @@ class QuorumCall<KEY, RESULT> {
}
}
/**
* Cancel any outstanding calls.
*/
void cancelCalls() {
for (ListenableFuture<RESULT> call : allCalls) {
call.cancel(true);
}
}
/**
* Check if any of the responses came back with an AssertionError.
* If so, it re-throws it, even if there was a quorum of responses.

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/client/QuorumJournalManager.java
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@ -579,6 +579,8 @@ public class QuorumJournalManager implements JournalManager {
LOG.debug(msg.toString());
}
}
// Cancel any outstanding calls to JN's.
q.cancelCalls();
int maxAllowedTxns = !onlyDurableTxns ? highestTxnCount :
responseCounts.get(responseCounts.size() - loggers.getMajoritySize());

8
hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
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@ -4787,6 +4787,14 @@
</description>
</property>
<property>
<name>dfs.qjournal.parallel-read.num-threads</name>
<value>5</value>
<description>
Number of threads per JN to be used for tailing edits.
</description>
</property>
<property>
<name>dfs.quota.by.storage.type.enabled</name>
<value>true</value>

6
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/qjournal/MiniJournalCluster.java
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@ -196,7 +196,11 @@ public class MiniJournalCluster {
public JournalNode getJournalNode(int i) {
return nodes[i].node;
}
public String getJournalNodeIpcAddress(int i) {
return nodes[i].ipcAddr.toString();
}
public void restartJournalNode(int i) throws InterruptedException, IOException {
JNInfo info = nodes[i];
JournalNode jn = info.node;

34
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/qjournal/client/TestQuorumJournalManager.java
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@ -49,6 +49,7 @@ import org.apache.hadoop.hdfs.qjournal.MiniJournalCluster;
import org.apache.hadoop.hdfs.qjournal.QJMTestUtil;
import org.apache.hadoop.hdfs.qjournal.protocol.QJournalProtocolProtos.SegmentStateProto;
import org.apache.hadoop.hdfs.qjournal.server.JournalFaultInjector;
import org.apache.hadoop.hdfs.qjournal.server.JournalNode;
import org.apache.hadoop.hdfs.server.namenode.EditLogInputStream;
import org.apache.hadoop.hdfs.server.namenode.EditLogOutputStream;
import org.apache.hadoop.hdfs.server.namenode.FileJournalManager;
@ -62,7 +63,9 @@ import org.apache.hadoop.test.GenericTestUtils;
import org.apache.log4j.Level;
import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TestName;
import org.mockito.Mockito;
import org.mockito.stubbing.Stubber;
@ -87,11 +90,17 @@ public class TestQuorumJournalManager {
GenericTestUtils.setLogLevel(ProtobufRpcEngine.LOG, Level.ALL);
}
@Rule
public TestName name = new TestName();
@Before
public void setup() throws Exception {
conf = new Configuration();
// Don't retry connections - it just slows down the tests.
conf.setInt(CommonConfigurationKeysPublic.IPC_CLIENT_CONNECT_MAX_RETRIES_KEY, 0);
if (!name.getMethodName().equals("testSelectThreadCounts")) {
// Don't retry connections - it just slows down the tests.
conf.setInt(
CommonConfigurationKeysPublic.IPC_CLIENT_CONNECT_MAX_RETRIES_KEY, 0);
}
// Turn off IPC client caching to handle daemon restarts.
conf.setInt(
CommonConfigurationKeysPublic.IPC_CLIENT_CONNECTION_MAXIDLETIME_KEY, 0);
@ -1039,6 +1048,27 @@ public class TestQuorumJournalManager {
}
}
@Test
public void testSelectThreadCounts() throws Exception {
EditLogOutputStream stm =
qjm.startLogSegment(1, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
writeTxns(stm, 1, 10);
JournalNode jn0 = cluster.getJournalNode(0);
String ipcAddr = cluster.getJournalNodeIpcAddress(0);
jn0.stopAndJoin(0);
for (int i = 0; i < 1000; i++) {
qjm.selectInputStreams(new ArrayList<>(), 1, true, false);
}
String expectedName =
"Logger channel (from parallel executor) to " + ipcAddr;
long num = Thread.getAllStackTraces().keySet().stream()
.filter((t) -> t.getName().contains(expectedName)).count();
// The number of threads for the stopped jn shouldn't be more than the
// configured value.
assertTrue("Number of threads are : " + num,
num <= DFSConfigKeys.DFS_QJOURNAL_PARALLEL_READ_NUM_THREADS_DEFAULT);
}
@Test
public void testSelectViaRpcTwoJNsError() throws Exception {
EditLogOutputStream stm =