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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.replication.regionserver;
import static org.apache.hadoop.hbase.wal.AbstractFSWALProvider.findArchivedLog;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.PriorityBlockingQueue;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicLong;
import java.util.function.Predicate;
import org.apache.commons.lang3.StringUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.Server;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.TableDescriptors;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.regionserver.HRegionServer;
import org.apache.hadoop.hbase.regionserver.RSRpcServices;
import org.apache.hadoop.hbase.regionserver.RegionServerCoprocessorHost;
import org.apache.hadoop.hbase.replication.ChainWALEntryFilter;
import org.apache.hadoop.hbase.replication.ClusterMarkingEntryFilter;
import org.apache.hadoop.hbase.replication.ReplicationEndpoint;
import org.apache.hadoop.hbase.replication.ReplicationException;
import org.apache.hadoop.hbase.replication.ReplicationPeer;
import org.apache.hadoop.hbase.replication.ReplicationQueueInfo;
import org.apache.hadoop.hbase.replication.ReplicationQueueStorage;
import org.apache.hadoop.hbase.replication.SystemTableWALEntryFilter;
import org.apache.hadoop.hbase.replication.WALEntryFilter;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.Pair;
import org.apache.hadoop.hbase.util.Threads;
import org.apache.hadoop.hbase.wal.AbstractFSWALProvider;
import org.apache.hadoop.hbase.wal.WAL.Entry;
import org.apache.yetus.audience.InterfaceAudience;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hbase.thirdparty.com.google.common.collect.Lists;
/**
* Class that handles the source of a replication stream. Currently does not handle more than 1
* slave cluster. For each slave cluster it selects a random number of peers using a replication
* ratio. For example, if replication ration = 0.1 and slave cluster has 100 region servers, 10 will
* be selected.
*
* A stream is considered down when we cannot contact a region server on the peer cluster for more
* than 55 seconds by default.
*
*/
@InterfaceAudience.Private
public class ReplicationSource implements ReplicationSourceInterface {
private static final Logger LOG = LoggerFactory.getLogger(ReplicationSource.class);
// per group queue size, keep no more than this number of logs in each wal group
protected int queueSizePerGroup;
protected ReplicationSourceLogQueue logQueue;
protected ReplicationQueueStorage queueStorage;
protected ReplicationPeer replicationPeer;
protected Configuration conf;
protected ReplicationQueueInfo replicationQueueInfo;
// id of the peer cluster this source replicates to
private String peerId;
// The manager of all sources to which we ping back our progress
protected ReplicationSourceManager manager;
// Should we stop everything?
protected Server server;
// How long should we sleep for each retry
private long sleepForRetries;
protected FileSystem fs;
// id of this cluster
private UUID clusterId;
// total number of edits we replicated
private AtomicLong totalReplicatedEdits = new AtomicLong(0);
// The znode we currently play with
protected String queueId;
// Maximum number of retries before taking bold actions
private int maxRetriesMultiplier;
// Indicates if this particular source is running
volatile boolean sourceRunning = false;
// Metrics for this source
private MetricsSource metrics;
// ReplicationEndpoint which will handle the actual replication
private volatile ReplicationEndpoint replicationEndpoint;
private boolean abortOnError;
// This is needed for the startup loop to identify when there's already
// an initialization happening (but not finished yet),
// so that it doesn't try submit another initialize thread.
// NOTE: this should only be set to false at the end of initialize method, prior to return.
private AtomicBoolean startupOngoing = new AtomicBoolean(false);
// Flag that signalizes uncaught error happening while starting up the source
// and a retry should be attempted
private AtomicBoolean retryStartup = new AtomicBoolean(false);
/**
* A filter (or a chain of filters) for WAL entries; filters out edits.
*/
protected volatile WALEntryFilter walEntryFilter;
// throttler
private ReplicationThrottler throttler;
private long defaultBandwidth;
private long currentBandwidth;
private WALFileLengthProvider walFileLengthProvider;
protected final ConcurrentHashMap workerThreads =
new ConcurrentHashMap<>();
private AtomicLong totalBufferUsed;
public static final String WAIT_ON_ENDPOINT_SECONDS =
"hbase.replication.wait.on.endpoint.seconds";
public static final int DEFAULT_WAIT_ON_ENDPOINT_SECONDS = 30;
private int waitOnEndpointSeconds = -1;
private Thread initThread;
/**
* WALs to replicate. Predicate that returns 'true' for WALs to replicate and false for WALs to
* skip.
*/
private final Predicate filterInWALs;
/**
* Base WALEntry filters for this class. Unmodifiable. Set on construction. Filters *out* edits we
* do not want replicated, passed on to replication endpoints. This is the basic set. Down in
* #initializeWALEntryFilter this set is added to the end of the WALEntry filter chain. These are
* put after those that we pick up from the configured endpoints and other machinations to create
* the final {@link #walEntryFilter}.
* @see WALEntryFilter
*/
private final List baseFilterOutWALEntries;
ReplicationSource() {
// Default, filters *in* all WALs but meta WALs & filters *out* all WALEntries of System Tables.
this(p -> !AbstractFSWALProvider.isMetaFile(p),
Lists.newArrayList(new SystemTableWALEntryFilter()));
}
/**
* @param replicateWAL Pass a filter to run against WAL Path; filter *in* WALs to
* Replicate; i.e. return 'true' if you want to replicate the
* content of the WAL.
* @param baseFilterOutWALEntries Base set of filters you want applied always; filters *out*
* WALEntries so they never make it out of this ReplicationSource.
*/
ReplicationSource(Predicate replicateWAL, List baseFilterOutWALEntries) {
this.filterInWALs = replicateWAL;
this.baseFilterOutWALEntries = Collections.unmodifiableList(baseFilterOutWALEntries);
}
/**
* Instantiation method used by region servers
* @param conf configuration to use
* @param fs file system to use
* @param manager replication manager to ping to
* @param server the server for this region server
* @param queueId the id of our replication queue
* @param clusterId unique UUID for the cluster
* @param metrics metrics for replication source
*/
@Override
public void init(Configuration conf, FileSystem fs, ReplicationSourceManager manager,
ReplicationQueueStorage queueStorage, ReplicationPeer replicationPeer, Server server,
String queueId, UUID clusterId, WALFileLengthProvider walFileLengthProvider,
MetricsSource metrics) throws IOException {
this.server = server;
this.conf = HBaseConfiguration.create(conf);
this.waitOnEndpointSeconds =
this.conf.getInt(WAIT_ON_ENDPOINT_SECONDS, DEFAULT_WAIT_ON_ENDPOINT_SECONDS);
decorateConf();
// 1 second
this.sleepForRetries = this.conf.getLong("replication.source.sleepforretries", 1000);
// 5 minutes @ 1 sec per
this.maxRetriesMultiplier = this.conf.getInt("replication.source.maxretriesmultiplier", 300);
this.queueSizePerGroup = this.conf.getInt("hbase.regionserver.maxlogs", 32);
this.logQueue = new ReplicationSourceLogQueue(conf, metrics, this);
this.queueStorage = queueStorage;
this.replicationPeer = replicationPeer;
this.manager = manager;
this.fs = fs;
this.metrics = metrics;
this.clusterId = clusterId;
this.queueId = queueId;
this.replicationQueueInfo = new ReplicationQueueInfo(queueId);
// ReplicationQueueInfo parses the peerId out of the znode for us
this.peerId = this.replicationQueueInfo.getPeerId();
// A defaultBandwidth of '0' means no bandwidth; i.e. no throttling.
defaultBandwidth = this.conf.getLong("replication.source.per.peer.node.bandwidth", 0);
currentBandwidth = getCurrentBandwidth();
this.throttler = new ReplicationThrottler((double) currentBandwidth / 10.0);
this.totalBufferUsed = manager.getTotalBufferUsed();
this.walFileLengthProvider = walFileLengthProvider;
this.abortOnError = this.conf.getBoolean("replication.source.regionserver.abort", true);
LOG.info("queueId={}, ReplicationSource: {}, currentBandwidth={}", queueId,
replicationPeer.getId(), this.currentBandwidth);
}
private void decorateConf() {
String replicationCodec = this.conf.get(HConstants.REPLICATION_CODEC_CONF_KEY);
if (StringUtils.isNotEmpty(replicationCodec)) {
this.conf.set(HConstants.RPC_CODEC_CONF_KEY, replicationCodec);
}
}
@Override
public void enqueueLog(Path wal) {
if (!this.filterInWALs.test(wal)) {
LOG.trace("NOT replicating {}", wal);
return;
}
// Use WAL prefix as the WALGroupId for this peer.
String walPrefix = AbstractFSWALProvider.getWALPrefixFromWALName(wal.getName());
boolean queueExists = logQueue.enqueueLog(wal, walPrefix);
if (!queueExists) {
if (this.isSourceActive() && this.walEntryFilter != null) {
// new wal group observed after source startup, start a new worker thread to track it
// notice: it's possible that wal enqueued when this.running is set but worker thread
// still not launched, so it's necessary to check workerThreads before start the worker
tryStartNewShipper(walPrefix);
}
}
if (LOG.isTraceEnabled()) {
LOG.trace("{} Added wal {} to queue of source {}.", logPeerId(), walPrefix,
this.replicationQueueInfo.getQueueId());
}
}
@InterfaceAudience.Private
public Map> getQueues() {
return logQueue.getQueues();
}
@Override
public void addHFileRefs(TableName tableName, byte[] family, List> pairs)
throws ReplicationException {
String peerId = replicationPeer.getId();
if (replicationPeer.getPeerConfig().needToReplicate(tableName, family)) {
this.queueStorage.addHFileRefs(peerId, pairs);
metrics.incrSizeOfHFileRefsQueue(pairs.size());
} else {
LOG.debug("HFiles will not be replicated belonging to the table {} family {} to peer id {}",
tableName, Bytes.toString(family), peerId);
}
}
private ReplicationEndpoint createReplicationEndpoint()
throws InstantiationException, IllegalAccessException, ClassNotFoundException, IOException {
RegionServerCoprocessorHost rsServerHost = null;
if (server instanceof HRegionServer) {
rsServerHost = ((HRegionServer) server).getRegionServerCoprocessorHost();
}
String replicationEndpointImpl = replicationPeer.getPeerConfig().getReplicationEndpointImpl();
ReplicationEndpoint replicationEndpoint;
if (replicationEndpointImpl == null) {
// Default to HBase inter-cluster replication endpoint; skip reflection
replicationEndpoint = new HBaseInterClusterReplicationEndpoint();
} else {
try {
replicationEndpoint = Class.forName(replicationEndpointImpl)
.asSubclass(ReplicationEndpoint.class).getDeclaredConstructor().newInstance();
} catch (NoSuchMethodException | InvocationTargetException e) {
throw new IllegalArgumentException(e);
}
}
if (rsServerHost != null) {
ReplicationEndpoint newReplicationEndPoint =
rsServerHost.postCreateReplicationEndPoint(replicationEndpoint);
if (newReplicationEndPoint != null) {
// Override the newly created endpoint from the hook with configured end point
replicationEndpoint = newReplicationEndPoint;
}
}
return replicationEndpoint;
}
private void initAndStartReplicationEndpoint(ReplicationEndpoint replicationEndpoint)
throws IOException, TimeoutException {
TableDescriptors tableDescriptors = null;
if (server instanceof HRegionServer) {
tableDescriptors = ((HRegionServer) server).getTableDescriptors();
}
replicationEndpoint
.init(new ReplicationEndpoint.Context(conf, replicationPeer.getConfiguration(), fs, peerId,
clusterId, replicationPeer, metrics, tableDescriptors, server));
replicationEndpoint.start();
replicationEndpoint.awaitRunning(waitOnEndpointSeconds, TimeUnit.SECONDS);
}
private void initializeWALEntryFilter(UUID peerClusterId) {
// get the WALEntryFilter from ReplicationEndpoint and add it to default filters
List filters = new ArrayList<>(this.baseFilterOutWALEntries);
WALEntryFilter filterFromEndpoint = this.replicationEndpoint.getWALEntryfilter();
if (filterFromEndpoint != null) {
filters.add(filterFromEndpoint);
}
filters.add(new ClusterMarkingEntryFilter(clusterId, peerClusterId, replicationEndpoint));
this.walEntryFilter = new ChainWALEntryFilter(filters);
}
private void tryStartNewShipper(String walGroupId) {
workerThreads.compute(walGroupId, (key, value) -> {
if (value != null) {
LOG.debug("{} preempted start of shipping worker walGroupId={}", logPeerId(), walGroupId);
return value;
} else {
LOG.debug("{} starting shipping worker for walGroupId={}", logPeerId(), walGroupId);
ReplicationSourceShipper worker = createNewShipper(walGroupId);
ReplicationSourceWALReader walReader =
createNewWALReader(walGroupId, worker.getStartPosition());
Threads.setDaemonThreadRunning(
walReader, Thread.currentThread().getName() + ".replicationSource.wal-reader."
+ walGroupId + "," + queueId,
(t, e) -> this.uncaughtException(t, e, this.manager, this.getPeerId()));
worker.setWALReader(walReader);
worker.startup((t, e) -> this.uncaughtException(t, e, this.manager, this.getPeerId()));
return worker;
}
});
}
@Override
public Map getWalGroupStatus() {
Map sourceReplicationStatus = new TreeMap<>();
long ageOfLastShippedOp, replicationDelay, fileSize;
for (Map.Entry walGroupShipper : workerThreads.entrySet()) {
String walGroupId = walGroupShipper.getKey();
ReplicationSourceShipper shipper = walGroupShipper.getValue();
ageOfLastShippedOp = metrics.getAgeOfLastShippedOp(walGroupId);
int queueSize = logQueue.getQueueSize(walGroupId);
replicationDelay = metrics.getReplicationDelay();
Path currentPath = shipper.getCurrentPath();
fileSize = -1;
if (currentPath != null) {
try {
fileSize = getFileSize(currentPath);
} catch (IOException e) {
LOG.warn("Ignore the exception as the file size of HLog only affects the web ui", e);
}
} else {
currentPath = new Path("NO_LOGS_IN_QUEUE");
LOG.warn("{} No replication ongoing, waiting for new log", logPeerId());
}
ReplicationStatus.ReplicationStatusBuilder statusBuilder = ReplicationStatus.newBuilder();
statusBuilder.withPeerId(this.getPeerId()).withQueueSize(queueSize).withWalGroup(walGroupId)
.withCurrentPath(currentPath).withCurrentPosition(shipper.getCurrentPosition())
.withFileSize(fileSize).withAgeOfLastShippedOp(ageOfLastShippedOp)
.withReplicationDelay(replicationDelay);
sourceReplicationStatus.put(this.getPeerId() + "=>" + walGroupId, statusBuilder.build());
}
return sourceReplicationStatus;
}
private long getFileSize(Path currentPath) throws IOException {
long fileSize;
try {
fileSize = fs.getContentSummary(currentPath).getLength();
} catch (FileNotFoundException e) {
Path archivedLogPath = findArchivedLog(currentPath, conf);
// archivedLogPath can be null if unable to locate in archiveDir.
if (archivedLogPath == null) {
throw new FileNotFoundException("Couldn't find path: " + currentPath);
}
fileSize = fs.getContentSummary(archivedLogPath).getLength();
}
return fileSize;
}
protected ReplicationSourceShipper createNewShipper(String walGroupId) {
return new ReplicationSourceShipper(conf, walGroupId, logQueue, this);
}
private ReplicationSourceWALReader createNewWALReader(String walGroupId, long startPosition) {
return replicationPeer.getPeerConfig().isSerial()
? new SerialReplicationSourceWALReader(fs, conf, logQueue, startPosition, walEntryFilter,
this, walGroupId)
: new ReplicationSourceWALReader(fs, conf, logQueue, startPosition, walEntryFilter, this,
walGroupId);
}
/**
* Call after {@link #initializeWALEntryFilter(UUID)} else it will be null.
* @return WAL Entry Filter Chain to use on WAL files filtering *out* WALEntry edits.
*/
WALEntryFilter getWalEntryFilter() {
return walEntryFilter;
}
private void uncaughtException(Thread t, Throwable e, ReplicationSourceManager manager,
String peerId) {
RSRpcServices.exitIfOOME(e);
LOG.error("Unexpected exception in {} currentPath={}", t.getName(), getCurrentPath(), e);
if (abortOnError) {
server.abort("Unexpected exception in " + t.getName(), e);
}
if (manager != null) {
while (true) {
try {
LOG.info("Refreshing replication sources now due to previous error on thread: {}",
t.getName());
manager.refreshSources(peerId);
break;
} catch (IOException e1) {
LOG.error("Replication sources refresh failed.", e1);
sleepForRetries("Sleeping before try refreshing sources again", maxRetriesMultiplier);
}
}
}
}
@Override
public ReplicationEndpoint getReplicationEndpoint() {
return this.replicationEndpoint;
}
@Override
public ReplicationSourceManager getSourceManager() {
return this.manager;
}
@Override
public void tryThrottle(int batchSize) throws InterruptedException {
checkBandwidthChangeAndResetThrottler();
if (throttler.isEnabled()) {
long sleepTicks = throttler.getNextSleepInterval(batchSize);
if (sleepTicks > 0) {
if (LOG.isTraceEnabled()) {
LOG.trace("{} To sleep {}ms for throttling control", logPeerId(), sleepTicks);
}
Thread.sleep(sleepTicks);
// reset throttler's cycle start tick when sleep for throttling occurs
throttler.resetStartTick();
}
}
}
private void checkBandwidthChangeAndResetThrottler() {
long peerBandwidth = getCurrentBandwidth();
if (peerBandwidth != currentBandwidth) {
currentBandwidth = peerBandwidth;
throttler.setBandwidth((double) currentBandwidth / 10.0);
LOG.info("ReplicationSource : " + peerId + " bandwidth throttling changed, currentBandWidth="
+ currentBandwidth);
}
}
private long getCurrentBandwidth() {
long peerBandwidth = replicationPeer.getPeerBandwidth();
// User can set peer bandwidth to 0 to use default bandwidth.
return peerBandwidth != 0 ? peerBandwidth : defaultBandwidth;
}
/**
* Do the sleeping logic
* @param msg Why we sleep
* @param sleepMultiplier by how many times the default sleeping time is augmented
* @return True if sleepMultiplier is < maxRetriesMultiplier
*/
protected boolean sleepForRetries(String msg, int sleepMultiplier) {
try {
if (LOG.isTraceEnabled()) {
LOG.trace("{} {}, sleeping {} times {}", logPeerId(), msg, sleepForRetries,
sleepMultiplier);
}
Thread.sleep(this.sleepForRetries * sleepMultiplier);
} catch (InterruptedException e) {
if (LOG.isDebugEnabled()) {
LOG.debug("{} Interrupted while sleeping between retries", logPeerId());
}
Thread.currentThread().interrupt();
}
return sleepMultiplier < maxRetriesMultiplier;
}
/**
* check whether the peer is enabled or not
* @return true if the peer is enabled, otherwise false
*/
@Override
public boolean isPeerEnabled() {
return replicationPeer.isPeerEnabled();
}
private void initialize() {
int sleepMultiplier = 1;
while (this.isSourceActive()) {
ReplicationEndpoint replicationEndpoint;
try {
replicationEndpoint = createReplicationEndpoint();
} catch (Exception e) {
LOG.warn("{} error creating ReplicationEndpoint, retry", logPeerId(), e);
if (sleepForRetries("Error creating ReplicationEndpoint", sleepMultiplier)) {
sleepMultiplier++;
}
continue;
}
try {
initAndStartReplicationEndpoint(replicationEndpoint);
this.replicationEndpoint = replicationEndpoint;
break;
} catch (Exception e) {
LOG.warn("{} Error starting ReplicationEndpoint, retry", logPeerId(), e);
replicationEndpoint.stop();
if (sleepForRetries("Error starting ReplicationEndpoint", sleepMultiplier)) {
sleepMultiplier++;
} else {
retryStartup.set(!this.abortOnError);
setSourceStartupStatus(false);
throw new RuntimeException("Exhausted retries to start replication endpoint.");
}
}
}
if (!this.isSourceActive()) {
// this means the server is shutting down or the source is terminated, just give up
// initializing
setSourceStartupStatus(false);
return;
}
sleepMultiplier = 1;
UUID peerClusterId;
// delay this until we are in an asynchronous thread
for (;;) {
peerClusterId = replicationEndpoint.getPeerUUID();
if (this.isSourceActive() && peerClusterId == null) {
if (LOG.isDebugEnabled()) {
LOG.debug("{} Could not connect to Peer ZK. Sleeping for {} millis", logPeerId(),
(this.sleepForRetries * sleepMultiplier));
}
if (sleepForRetries("Cannot contact the peer's zk ensemble", sleepMultiplier)) {
sleepMultiplier++;
}
} else {
break;
}
}
if (!this.isSourceActive()) {
// this means the server is shutting down or the source is terminated, just give up
// initializing
setSourceStartupStatus(false);
return;
}
LOG.info("{} queueId={} (queues={}) is replicating from cluster={} to cluster={}", logPeerId(),
this.replicationQueueInfo.getQueueId(), logQueue.getNumQueues(), clusterId, peerClusterId);
initializeWALEntryFilter(peerClusterId);
// Start workers
for (String walGroupId : logQueue.getQueues().keySet()) {
tryStartNewShipper(walGroupId);
}
setSourceStartupStatus(false);
}
private synchronized void setSourceStartupStatus(boolean initializing) {
startupOngoing.set(initializing);
if (initializing) {
metrics.incrSourceInitializing();
} else {
metrics.decrSourceInitializing();
}
}
@Override
public ReplicationSourceInterface startup() {
if (this.sourceRunning) {
return this;
}
this.sourceRunning = true;
setSourceStartupStatus(true);
initThread = new Thread(this::initialize);
Threads.setDaemonThreadRunning(initThread,
Thread.currentThread().getName() + ".replicationSource," + this.queueId, (t, e) -> {
// if first initialization attempt failed, and abortOnError is false, we will
// keep looping in this thread until initialize eventually succeeds,
// while the server main startup one can go on with its work.
sourceRunning = false;
uncaughtException(t, e, null, null);
retryStartup.set(!this.abortOnError);
do {
if (retryStartup.get()) {
this.sourceRunning = true;
setSourceStartupStatus(true);
retryStartup.set(false);
try {
initialize();
} catch (Throwable error) {
setSourceStartupStatus(false);
uncaughtException(t, error, null, null);
retryStartup.set(!this.abortOnError);
}
}
} while ((this.startupOngoing.get() || this.retryStartup.get()) && !this.abortOnError);
});
return this;
}
@Override
public void terminate(String reason) {
terminate(reason, null);
}
@Override
public void terminate(String reason, Exception cause) {
terminate(reason, cause, true);
}
@Override
public void terminate(String reason, Exception cause, boolean clearMetrics) {
terminate(reason, cause, clearMetrics, true);
}
public void terminate(String reason, Exception cause, boolean clearMetrics, boolean join) {
if (cause == null) {
LOG.info("{} Closing source {} because: {}", logPeerId(), this.queueId, reason);
} else {
LOG.error(String.format("%s Closing source %s because an error occurred: %s", logPeerId(),
this.queueId, reason), cause);
}
this.sourceRunning = false;
if (initThread != null && Thread.currentThread() != initThread) {
// This usually won't happen but anyway, let's wait until the initialization thread exits.
// And notice that we may call terminate directly from the initThread so here we need to
// avoid join on ourselves.
initThread.interrupt();
Threads.shutdown(initThread, this.sleepForRetries);
}
Collection workers = workerThreads.values();
for (ReplicationSourceShipper worker : workers) {
worker.stopWorker();
if (worker.entryReader != null) {
worker.entryReader.setReaderRunning(false);
}
}
if (this.replicationEndpoint != null) {
this.replicationEndpoint.stop();
}
for (ReplicationSourceShipper worker : workers) {
if (worker.isAlive() || worker.entryReader.isAlive()) {
try {
// Wait worker to stop
Thread.sleep(this.sleepForRetries);
} catch (InterruptedException e) {
LOG.info("{} Interrupted while waiting {} to stop", logPeerId(), worker.getName());
Thread.currentThread().interrupt();
}
// If worker still is alive after waiting, interrupt it
if (worker.isAlive()) {
worker.interrupt();
}
// If entry reader is alive after waiting, interrupt it
if (worker.entryReader.isAlive()) {
worker.entryReader.interrupt();
}
}
if (!server.isAborted() && !server.isStopped()) {
// If server is running and worker is already stopped but there was still entries batched,
// we need to clear buffer used for non processed entries
worker.clearWALEntryBatch();
}
}
if (join) {
for (ReplicationSourceShipper worker : workers) {
Threads.shutdown(worker, this.sleepForRetries);
LOG.info("{} ReplicationSourceWorker {} terminated", logPeerId(), worker.getName());
}
if (this.replicationEndpoint != null) {
try {
this.replicationEndpoint.awaitTerminated(sleepForRetries * maxRetriesMultiplier,
TimeUnit.MILLISECONDS);
} catch (TimeoutException te) {
LOG.warn("{} Got exception while waiting for endpoint to shutdown "
+ "for replication source : {}", logPeerId(), this.queueId, te);
}
}
}
if (clearMetrics) {
// Can be null in test context.
if (this.metrics != null) {
this.metrics.clear();
}
}
}
@Override
public String getQueueId() {
return this.queueId;
}
@Override
public String getPeerId() {
return this.peerId;
}
@Override
public Path getCurrentPath() {
// only for testing
for (ReplicationSourceShipper worker : workerThreads.values()) {
if (worker.getCurrentPath() != null) {
return worker.getCurrentPath();
}
}
return null;
}
@Override
public boolean isSourceActive() {
return !this.server.isStopped() && this.sourceRunning;
}
public ReplicationQueueInfo getReplicationQueueInfo() {
return replicationQueueInfo;
}
public boolean isWorkerRunning() {
for (ReplicationSourceShipper worker : this.workerThreads.values()) {
if (worker.isActive()) {
return worker.isActive();
}
}
return false;
}
@Override
public String getStats() {
StringBuilder sb = new StringBuilder();
sb.append("Total replicated edits: ").append(totalReplicatedEdits)
.append(", current progress: \n");
for (Map.Entry entry : workerThreads.entrySet()) {
String walGroupId = entry.getKey();
ReplicationSourceShipper worker = entry.getValue();
long position = worker.getCurrentPosition();
Path currentPath = worker.getCurrentPath();
sb.append("walGroup [").append(walGroupId).append("]: ");
if (currentPath != null) {
sb.append("currently replicating from: ").append(currentPath).append(" at position: ")
.append(position).append("\n");
} else {
sb.append("no replication ongoing, waiting for new log");
}
}
return sb.toString();
}
@Override
public MetricsSource getSourceMetrics() {
return this.metrics;
}
@Override
// offsets totalBufferUsed by deducting shipped batchSize.
public void postShipEdits(List entries, int batchSize) {
if (throttler.isEnabled()) {
throttler.addPushSize(batchSize);
}
totalReplicatedEdits.addAndGet(entries.size());
long newBufferUsed = totalBufferUsed.addAndGet(-batchSize);
// Record the new buffer usage
this.manager.getGlobalMetrics().setWALReaderEditsBufferBytes(newBufferUsed);
}
@Override
public WALFileLengthProvider getWALFileLengthProvider() {
return walFileLengthProvider;
}
@Override
public ServerName getServerWALsBelongTo() {
return server.getServerName();
}
Server getServer() {
return server;
}
@Override
public ReplicationQueueStorage getReplicationQueueStorage() {
return queueStorage;
}
/** Returns String to use as a log prefix that contains current peerId. */
public String logPeerId() {
return "peerId=" + this.getPeerId() + ",";
}
}