HDFS-14655. [SBN Read] Namenode crashes if one of The JN is down. Contributed by Ayush Saxena.
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@ -1065,6 +1065,8 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
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public static final String DFS_QJOURNAL_WRITE_TXNS_TIMEOUT_KEY = "dfs.qjournal.write-txns.timeout.ms";
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public static final String DFS_QJOURNAL_HTTP_OPEN_TIMEOUT_KEY = "dfs.qjournal.http.open.timeout.ms";
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public static final String DFS_QJOURNAL_HTTP_READ_TIMEOUT_KEY = "dfs.qjournal.http.read.timeout.ms";
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public static final String DFS_QJOURNAL_PARALLEL_READ_NUM_THREADS_KEY =
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"dfs.qjournal.parallel-read.num-threads";
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public static final int DFS_QJOURNAL_START_SEGMENT_TIMEOUT_DEFAULT = 20000;
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public static final int DFS_QJOURNAL_PREPARE_RECOVERY_TIMEOUT_DEFAULT = 120000;
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public static final int DFS_QJOURNAL_ACCEPT_RECOVERY_TIMEOUT_DEFAULT = 120000;
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@ -1075,6 +1077,7 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
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public static final int DFS_QJOURNAL_WRITE_TXNS_TIMEOUT_DEFAULT = 20000;
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public static final int DFS_QJOURNAL_HTTP_OPEN_TIMEOUT_DEFAULT = URLConnectionFactory.DEFAULT_SOCKET_TIMEOUT;
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public static final int DFS_QJOURNAL_HTTP_READ_TIMEOUT_DEFAULT = URLConnectionFactory.DEFAULT_SOCKET_TIMEOUT;
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public static final int DFS_QJOURNAL_PARALLEL_READ_NUM_THREADS_DEFAULT = 5;
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public static final String DFS_MAX_NUM_BLOCKS_TO_LOG_KEY = "dfs.namenode.max-num-blocks-to-log";
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public static final long DFS_MAX_NUM_BLOCKS_TO_LOG_DEFAULT = 1000l;
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@ -27,6 +27,7 @@ import java.util.concurrent.Callable;
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import java.util.concurrent.ExecutionException;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import java.util.concurrent.LinkedBlockingQueue;
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import java.util.concurrent.TimeUnit;
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import org.apache.hadoop.classification.InterfaceAudience;
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@ -54,6 +55,7 @@ import org.apache.hadoop.ipc.ProtobufRpcEngine;
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import org.apache.hadoop.ipc.RPC;
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import org.apache.hadoop.security.SecurityUtil;
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import org.apache.hadoop.util.StopWatch;
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import org.apache.hadoop.util.concurrent.HadoopThreadPoolExecutor;
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import com.google.common.annotations.VisibleForTesting;
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import com.google.common.base.Preconditions;
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@ -270,12 +272,14 @@ public class IPCLoggerChannel implements AsyncLogger {
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*/
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@VisibleForTesting
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protected ExecutorService createParallelExecutor() {
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return Executors.newCachedThreadPool(
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new ThreadFactoryBuilder()
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.setDaemon(true)
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int numThreads =
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conf.getInt(DFSConfigKeys.DFS_QJOURNAL_PARALLEL_READ_NUM_THREADS_KEY,
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DFSConfigKeys.DFS_QJOURNAL_PARALLEL_READ_NUM_THREADS_DEFAULT);
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return new HadoopThreadPoolExecutor(1, numThreads, 60L,
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TimeUnit.SECONDS, new LinkedBlockingQueue<>(),
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new ThreadFactoryBuilder().setDaemon(true)
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.setNameFormat("Logger channel (from parallel executor) to " + addr)
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.setUncaughtExceptionHandler(
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UncaughtExceptionHandlers.systemExit())
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.setUncaughtExceptionHandler(UncaughtExceptionHandlers.systemExit())
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.build());
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}
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@ -17,6 +17,8 @@
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*/
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package org.apache.hadoop.hdfs.qjournal.client;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.concurrent.TimeoutException;
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@ -64,6 +66,7 @@ class QuorumCall<KEY, RESULT> {
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private static final float WAIT_PROGRESS_WARN_THRESHOLD = 0.7f;
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private final StopWatch quorumStopWatch;
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private final Timer timer;
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private final List<ListenableFuture<RESULT>> allCalls;
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static <KEY, RESULT> QuorumCall<KEY, RESULT> create(
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Map<KEY, ? extends ListenableFuture<RESULT>> calls, Timer timer) {
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@ -71,6 +74,7 @@ class QuorumCall<KEY, RESULT> {
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for (final Entry<KEY, ? extends ListenableFuture<RESULT>> e : calls.entrySet()) {
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Preconditions.checkArgument(e.getValue() != null,
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"null future for key: " + e.getKey());
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qr.addCall(e.getValue());
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Futures.addCallback(e.getValue(), new FutureCallback<RESULT>() {
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@Override
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public void onFailure(Throwable t) {
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@ -102,6 +106,11 @@ class QuorumCall<KEY, RESULT> {
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// Only instantiated from factory method above
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this.timer = timer;
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this.quorumStopWatch = new StopWatch(timer);
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this.allCalls = new ArrayList<>();
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}
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private void addCall(ListenableFuture<RESULT> call) {
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allCalls.add(call);
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}
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/**
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@ -211,6 +220,15 @@ class QuorumCall<KEY, RESULT> {
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}
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}
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/**
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* Cancel any outstanding calls.
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*/
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void cancelCalls() {
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for (ListenableFuture<RESULT> call : allCalls) {
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call.cancel(true);
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}
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}
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/**
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* Check if any of the responses came back with an AssertionError.
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* If so, it re-throws it, even if there was a quorum of responses.
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@ -579,6 +579,8 @@ public class QuorumJournalManager implements JournalManager {
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LOG.debug(msg.toString());
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}
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}
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// Cancel any outstanding calls to JN's.
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q.cancelCalls();
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int maxAllowedTxns = !onlyDurableTxns ? highestTxnCount :
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responseCounts.get(responseCounts.size() - loggers.getMajoritySize());
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@ -4634,6 +4634,14 @@
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</description>
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</property>
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<property>
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<name>dfs.qjournal.parallel-read.num-threads</name>
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<value>5</value>
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<description>
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Number of threads per JN to be used for tailing edits.
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</description>
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</property>
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<property>
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<name>dfs.quota.by.storage.type.enabled</name>
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<value>true</value>
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@ -196,6 +196,10 @@ public class MiniJournalCluster {
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return nodes[i].node;
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}
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public String getJournalNodeIpcAddress(int i) {
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return nodes[i].ipcAddr.toString();
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}
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public void restartJournalNode(int i) throws InterruptedException, IOException {
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JNInfo info = nodes[i];
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JournalNode jn = info.node;
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@ -49,6 +49,7 @@ import org.apache.hadoop.hdfs.qjournal.MiniJournalCluster;
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import org.apache.hadoop.hdfs.qjournal.QJMTestUtil;
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import org.apache.hadoop.hdfs.qjournal.protocol.QJournalProtocolProtos.SegmentStateProto;
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import org.apache.hadoop.hdfs.qjournal.server.JournalFaultInjector;
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import org.apache.hadoop.hdfs.qjournal.server.JournalNode;
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import org.apache.hadoop.hdfs.server.namenode.EditLogInputStream;
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import org.apache.hadoop.hdfs.server.namenode.EditLogOutputStream;
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import org.apache.hadoop.hdfs.server.namenode.FileJournalManager;
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@ -62,7 +63,9 @@ import org.apache.hadoop.test.GenericTestUtils;
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import org.apache.log4j.Level;
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import org.junit.After;
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import org.junit.Before;
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import org.junit.Rule;
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import org.junit.Test;
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import org.junit.rules.TestName;
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import org.mockito.Mockito;
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import org.mockito.stubbing.Stubber;
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@ -87,11 +90,17 @@ public class TestQuorumJournalManager {
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GenericTestUtils.setLogLevel(ProtobufRpcEngine.LOG, Level.ALL);
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}
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@Rule
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public TestName name = new TestName();
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@Before
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public void setup() throws Exception {
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conf = new Configuration();
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if (!name.getMethodName().equals("testSelectThreadCounts")) {
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// Don't retry connections - it just slows down the tests.
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conf.setInt(CommonConfigurationKeysPublic.IPC_CLIENT_CONNECT_MAX_RETRIES_KEY, 0);
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conf.setInt(
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CommonConfigurationKeysPublic.IPC_CLIENT_CONNECT_MAX_RETRIES_KEY, 0);
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}
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// Turn off IPC client caching to handle daemon restarts.
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conf.setInt(
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CommonConfigurationKeysPublic.IPC_CLIENT_CONNECTION_MAXIDLETIME_KEY, 0);
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@ -1039,6 +1048,27 @@ public class TestQuorumJournalManager {
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}
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}
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@Test
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public void testSelectThreadCounts() throws Exception {
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EditLogOutputStream stm =
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qjm.startLogSegment(1, NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
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writeTxns(stm, 1, 10);
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JournalNode jn0 = cluster.getJournalNode(0);
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String ipcAddr = cluster.getJournalNodeIpcAddress(0);
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jn0.stopAndJoin(0);
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for (int i = 0; i < 1000; i++) {
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qjm.selectInputStreams(new ArrayList<>(), 1, true, false);
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}
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String expectedName =
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"Logger channel (from parallel executor) to " + ipcAddr;
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long num = Thread.getAllStackTraces().keySet().stream()
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.filter((t) -> t.getName().contains(expectedName)).count();
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// The number of threads for the stopped jn shouldn't be more than the
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// configured value.
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assertTrue("Number of threads are : " + num,
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num <= DFSConfigKeys.DFS_QJOURNAL_PARALLEL_READ_NUM_THREADS_DEFAULT);
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}
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@Test
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public void testSelectViaRpcTwoJNsError() throws Exception {
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EditLogOutputStream stm =
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