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HDFS-16016. BPServiceActor to provide new thread to handle IBR (#2998)

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Contributed by Viraj Jasani
This commit is contained in:
Viraj Jasani 2021-06-15 02:53:50 +05:30 committed by GitHub
parent e31d06032b
commit c1bf3cb0da
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3 changed files with 86 additions and 17 deletions
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62
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java
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@ -34,6 +34,8 @@
import java.util.TreeSet;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.atomic.AtomicBoolean;
@ -66,6 +68,7 @@
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.ipc.RemoteException;
import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.thirdparty.com.google.common.util.concurrent.ThreadFactoryBuilder;
import org.apache.hadoop.util.Time;
import org.apache.hadoop.util.VersionInfo;
import org.apache.hadoop.util.VersionUtil;
@ -94,6 +97,8 @@ class BPServiceActor implements Runnable {
volatile long lastCacheReport = 0;
private final Scheduler scheduler;
private final Object sendIBRLock;
private final ExecutorService ibrExecutorService;
Thread bpThread;
DatanodeProtocolClientSideTranslatorPB bpNamenode;
@ -149,6 +154,10 @@ enum RunningState {
}
commandProcessingThread = new CommandProcessingThread(this);
commandProcessingThread.start();
sendIBRLock = new Object();
ibrExecutorService = Executors.newSingleThreadExecutor(
new ThreadFactoryBuilder().setDaemon(true)
.setNameFormat("ibr-executor-%d").build());
}
public DatanodeRegistration getBpRegistration() {
@ -368,8 +377,10 @@ List<DatanodeCommand> blockReport(long fullBrLeaseId) throws IOException {
// we have a chance that we will miss the delHint information
// or we will report an RBW replica after the BlockReport already reports
// a FINALIZED one.
ibrManager.sendIBRs(bpNamenode, bpRegistration,
bpos.getBlockPoolId(), getRpcMetricSuffix());
synchronized (sendIBRLock) {
ibrManager.sendIBRs(bpNamenode, bpRegistration,
bpos.getBlockPoolId(), getRpcMetricSuffix());
}
long brCreateStartTime = monotonicNow();
Map<DatanodeStorage, BlockListAsLongs> perVolumeBlockLists =
@ -600,6 +611,9 @@ void stop() {
if (commandProcessingThread != null) {
commandProcessingThread.interrupt();
}
if (ibrExecutorService != null && !ibrExecutorService.isShutdown()) {
ibrExecutorService.shutdownNow();
}
}
//This must be called only by blockPoolManager
@ -614,13 +628,18 @@ void join() {
} catch (InterruptedException ie) { }
}
//Cleanup method to be called by current thread before exiting.
// Cleanup method to be called by current thread before exiting.
// Any Thread / ExecutorService started by BPServiceActor can be shutdown
// here.
private synchronized void cleanUp() {
shouldServiceRun = false;
IOUtils.cleanupWithLogger(null, bpNamenode);
IOUtils.cleanupWithLogger(null, lifelineSender);
bpos.shutdownActor(this);
if (!ibrExecutorService.isShutdown()) {
ibrExecutorService.shutdownNow();
}
}
private void handleRollingUpgradeStatus(HeartbeatResponse resp) throws IOException {
@ -706,11 +725,6 @@ private void offerService() throws Exception {
commandProcessingThread.enqueue(resp.getCommands());
}
}
if (!dn.areIBRDisabledForTests() &&
(ibrManager.sendImmediately()|| sendHeartbeat)) {
ibrManager.sendIBRs(bpNamenode, bpRegistration,
bpos.getBlockPoolId(), getRpcMetricSuffix());
}
List<DatanodeCommand> cmds = null;
boolean forceFullBr =
@ -874,6 +888,10 @@ public void run() {
initialRegistrationComplete.countDown();
}
// IBR tasks to be handled separately from offerService() in order to
// improve performance of offerService(), which can now focus only on
// FBR and heartbeat.
ibrExecutorService.submit(new IBRTaskHandler());
while (shouldRun()) {
try {
offerService();
@ -1104,6 +1122,34 @@ private void sendLifeline() throws IOException {
}
}
class IBRTaskHandler implements Runnable {
@Override
public void run() {
LOG.info("Starting IBR Task Handler.");
while (shouldRun()) {
try {
final long startTime = scheduler.monotonicNow();
final boolean sendHeartbeat = scheduler.isHeartbeatDue(startTime);
if (!dn.areIBRDisabledForTests() &&
(ibrManager.sendImmediately() || sendHeartbeat)) {
synchronized (sendIBRLock) {
ibrManager.sendIBRs(bpNamenode, bpRegistration,
bpos.getBlockPoolId(), getRpcMetricSuffix());
}
}
// There is no work to do; sleep until heartbeat timer elapses,
// or work arrives, and then iterate again.
ibrManager.waitTillNextIBR(scheduler.getHeartbeatWaitTime());
} catch (Throwable t) {
LOG.error("Exception in IBRTaskHandler.", t);
sleepAndLogInterrupts(5000, "offering IBR service");
}
}
}
}
/**
* Utility class that wraps the timestamp computations for scheduling
* heartbeats and block reports.

15
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDatanodeReport.java
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@ -172,8 +172,19 @@ public void testDatanodeReportMissingBlock() throws Exception {
// all bad datanodes
}
cluster.triggerHeartbeats(); // IBR delete ack
lb = fs.getClient().getLocatedBlocks(p.toString(), 0).get(0);
assertEquals(0, lb.getLocations().length);
int retries = 0;
while (true) {
lb = fs.getClient().getLocatedBlocks(p.toString(), 0).get(0);
if (0 != lb.getLocations().length) {
retries++;
if (retries > 7) {
Assert.fail("getLocatedBlocks failed after 7 retries");
}
Thread.sleep(2000);
} else {
break;
}
}
} finally {
cluster.shutdown();
}

24
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestIncrementalBlockReports.java
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@ -25,6 +25,7 @@
import java.io.IOException;
import org.mockito.exceptions.base.MockitoAssertionError;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.conf.Configuration;
@ -156,7 +157,7 @@ public void testReportBlockDeleted() throws InterruptedException, IOException {
// Sleep for a very short time since IBR is generated
// asynchronously.
Thread.sleep(2000);
Thread.sleep(1000);
// Ensure that no block report was generated immediately.
// Deleted blocks are reported when the IBR timer elapses.
@ -167,13 +168,24 @@ public void testReportBlockDeleted() throws InterruptedException, IOException {
// Trigger a heartbeat, this also triggers an IBR.
DataNodeTestUtils.triggerHeartbeat(singletonDn);
Thread.sleep(2000);
// Ensure that the deleted block is reported.
Mockito.verify(nnSpy, times(1)).blockReceivedAndDeleted(
any(DatanodeRegistration.class),
anyString(),
any(StorageReceivedDeletedBlocks[].class));
int retries = 0;
while (true) {
try {
Mockito.verify(nnSpy, atLeastOnce()).blockReceivedAndDeleted(
any(DatanodeRegistration.class),
anyString(),
any(StorageReceivedDeletedBlocks[].class));
break;
} catch (MockitoAssertionError e) {
if (retries > 7) {
throw e;
}
retries++;
Thread.sleep(2000);
}
}
} finally {
cluster.shutdown();