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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 java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Queue;
import java.util.Set;
import java.util.stream.Collectors;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.hbase.Abortable;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.Stoppable;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.ClusterConnection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.client.replication.TableCFs;
import org.apache.hadoop.hbase.io.WALLink;
import org.apache.hadoop.hbase.procedure2.util.StringUtils;
import org.apache.hadoop.hbase.replication.ReplicationFactory;
import org.apache.hadoop.hbase.replication.ReplicationPeerConfig;
import org.apache.hadoop.hbase.replication.ReplicationPeerDescription;
import org.apache.hadoop.hbase.replication.ReplicationQueueInfo;
import org.apache.hadoop.hbase.replication.ReplicationQueueStorage;
import org.apache.hadoop.hbase.replication.ReplicationStorageFactory;
import org.apache.hadoop.hbase.replication.ReplicationTracker;
import org.apache.hadoop.hbase.zookeeper.ZKUtil;
import org.apache.hadoop.hbase.zookeeper.ZKWatcher;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.apache.yetus.audience.InterfaceAudience;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hbase.thirdparty.com.google.common.util.concurrent.AtomicLongMap;
/**
* Provides information about the existing states of replication, replication peers and queues.
*
* Usage: hbase org.apache.hadoop.hbase.replication.regionserver.DumpReplicationQueues [args]
* Arguments: --distributed Polls each RS to dump information about the queue
* --hdfs Reports HDFS usage by the replication queues (note: can be overestimated).
*/
@InterfaceAudience.Private
public class DumpReplicationQueues extends Configured implements Tool {
private static final Logger LOG = LoggerFactory.getLogger(DumpReplicationQueues.class.getName());
private List deadRegionServers;
private List deletedQueues;
private AtomicLongMap peersQueueSize;
private long totalSizeOfWALs;
private long numWalsNotFound;
public DumpReplicationQueues() {
deadRegionServers = new ArrayList<>();
deletedQueues = new ArrayList<>();
peersQueueSize = AtomicLongMap.create();
totalSizeOfWALs = 0;
numWalsNotFound = 0;
}
static class DumpOptions {
boolean hdfs = false;
boolean distributed = false;
public DumpOptions() {
}
public DumpOptions(DumpOptions that) {
this.hdfs = that.hdfs;
this.distributed = that.distributed;
}
boolean isHdfs () {
return hdfs;
}
boolean isDistributed() {
return distributed;
}
void setHdfs (boolean hdfs) {
this.hdfs = hdfs;
}
void setDistributed(boolean distributed) {
this.distributed = distributed;
}
}
static DumpOptions parseOpts(Queue args) {
DumpOptions opts = new DumpOptions();
String cmd = null;
while ((cmd = args.poll()) != null) {
if (cmd.equals("-h") || cmd.equals("--h") || cmd.equals("--help")) {
// place item back onto queue so that caller knows parsing was incomplete
args.add(cmd);
break;
}
final String hdfs = "--hdfs";
if (cmd.equals(hdfs)) {
opts.setHdfs(true);
continue;
}
final String distributed = "--distributed";
if (cmd.equals(distributed)) {
opts.setDistributed(true);
continue;
} else {
printUsageAndExit("ERROR: Unrecognized option/command: " + cmd, -1);
}
// check that --distributed is present when --hdfs is in the arguments
if (!opts.isDistributed() && opts.isHdfs()) {
printUsageAndExit("ERROR: --hdfs option can only be used with --distributed: " + cmd, -1);
}
}
return opts;
}
/**
* Main
*
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
Configuration conf = HBaseConfiguration.create();
int ret = ToolRunner.run(conf, new DumpReplicationQueues(), args);
System.exit(ret);
}
@Override
public int run(String[] args) throws Exception {
int errCode = -1;
LinkedList argv = new LinkedList<>();
argv.addAll(Arrays.asList(args));
DumpOptions opts = parseOpts(argv);
// args remaining, print help and exit
if (!argv.isEmpty()) {
errCode = 0;
printUsage();
return errCode;
}
return dumpReplicationQueues(opts);
}
protected void printUsage() {
printUsage(this.getClass().getName(), null);
}
protected static void printUsage(final String message) {
printUsage(DumpReplicationQueues.class.getName(), message);
}
protected static void printUsage(final String className, final String message) {
if (message != null && message.length() > 0) {
System.err.println(message);
}
System.err.println("Usage: hbase " + className + " \\");
System.err.println(" [-D]*");
System.err.println();
System.err.println("General Options:");
System.err.println(" -h|--h|--help Show this help and exit.");
System.err.println(" --distributed Poll each RS and print its own replication queue. "
+ "Default only polls ZooKeeper");
System.err.println(" --hdfs Use HDFS to calculate usage of WALs by replication."
+ " It could be overestimated if replicating to multiple peers."
+ " --distributed flag is also needed.");
}
protected static void printUsageAndExit(final String message, final int exitCode) {
printUsage(message);
System.exit(exitCode);
}
private int dumpReplicationQueues(DumpOptions opts) throws Exception {
Configuration conf = getConf();
HBaseAdmin.available(conf);
ClusterConnection connection = (ClusterConnection) ConnectionFactory.createConnection(conf);
Admin admin = connection.getAdmin();
ZKWatcher zkw = new ZKWatcher(conf, "DumpReplicationQueues" + System.currentTimeMillis(),
new WarnOnlyAbortable(), true);
try {
// Our zk watcher
LOG.info("Our Quorum: " + zkw.getQuorum());
List replicatedTableCFs = admin.listReplicatedTableCFs();
if (replicatedTableCFs.isEmpty()) {
LOG.info("No tables with a configured replication peer were found.");
return(0);
} else {
LOG.info("Replicated Tables: " + replicatedTableCFs);
}
List peers = admin.listReplicationPeers();
if (peers.isEmpty()) {
LOG.info("Replication is enabled but no peer configuration was found.");
}
System.out.println("Dumping replication peers and configurations:");
System.out.println(dumpPeersState(peers));
if (opts.isDistributed()) {
LOG.info("Found [--distributed], will poll each RegionServer.");
Set peerIds = peers.stream().map((peer) -> peer.getPeerId())
.collect(Collectors.toSet());
System.out.println(dumpQueues(zkw, peerIds, opts.isHdfs()));
System.out.println(dumpReplicationSummary());
} else {
// use ZK instead
System.out.print("Dumping replication znodes via ZooKeeper:");
System.out.println(ZKUtil.getReplicationZnodesDump(zkw));
}
return (0);
} catch (IOException e) {
return (-1);
} finally {
zkw.close();
}
}
public String dumpReplicationSummary() {
StringBuilder sb = new StringBuilder();
if (!deletedQueues.isEmpty()) {
sb.append("Found " + deletedQueues.size() + " deleted queues"
+ ", run hbck -fixReplication in order to remove the deleted replication queues\n");
for (String deletedQueue : deletedQueues) {
sb.append(" " + deletedQueue + "\n");
}
}
if (!deadRegionServers.isEmpty()) {
sb.append("Found " + deadRegionServers.size() + " dead regionservers"
+ ", restart one regionserver to transfer the queues of dead regionservers\n");
for (String deadRs : deadRegionServers) {
sb.append(" " + deadRs + "\n");
}
}
if (!peersQueueSize.isEmpty()) {
sb.append("Dumping all peers's number of WALs in replication queue\n");
for (Map.Entry entry : peersQueueSize.asMap().entrySet()) {
sb.append(" PeerId: " + entry.getKey() + " , sizeOfLogQueue: " + entry.getValue() + "\n");
}
}
sb.append(" Total size of WALs on HDFS: " + StringUtils.humanSize(totalSizeOfWALs) + "\n");
if (numWalsNotFound > 0) {
sb.append(" ERROR: There are " + numWalsNotFound + " WALs not found!!!\n");
}
return sb.toString();
}
public String dumpPeersState(List peers) throws Exception {
Map currentConf;
StringBuilder sb = new StringBuilder();
for (ReplicationPeerDescription peer : peers) {
ReplicationPeerConfig peerConfig = peer.getPeerConfig();
sb.append("Peer: " + peer.getPeerId() + "\n");
sb.append(" " + "State: " + (peer.isEnabled() ? "ENABLED" : "DISABLED") + "\n");
sb.append(" " + "Cluster Name: " + peerConfig.getClusterKey() + "\n");
sb.append(" " + "Replication Endpoint: " + peerConfig.getReplicationEndpointImpl() + "\n");
currentConf = peerConfig.getConfiguration();
// Only show when we have a custom configuration for the peer
if (currentConf.size() > 1) {
sb.append(" " + "Peer Configuration: " + currentConf + "\n");
}
sb.append(" " + "Peer Table CFs: " + peerConfig.getTableCFsMap() + "\n");
sb.append(" " + "Peer Namespaces: " + peerConfig.getNamespaces() + "\n");
}
return sb.toString();
}
public String dumpQueues(ZKWatcher zkw, Set peerIds,
boolean hdfs) throws Exception {
ReplicationQueueStorage queueStorage;
ReplicationTracker replicationTracker;
StringBuilder sb = new StringBuilder();
queueStorage = ReplicationStorageFactory.getReplicationQueueStorage(zkw, getConf());
replicationTracker = ReplicationFactory.getReplicationTracker(zkw, new WarnOnlyAbortable(),
new WarnOnlyStoppable());
Set liveRegionServers = new HashSet<>(replicationTracker.getListOfRegionServers());
// Loops each peer on each RS and dumps the queues
List regionservers = queueStorage.getListOfReplicators();
if (regionservers == null || regionservers.isEmpty()) {
return sb.toString();
}
for (ServerName regionserver : regionservers) {
List queueIds = queueStorage.getAllQueues(regionserver);
if (!liveRegionServers.contains(regionserver.getServerName())) {
deadRegionServers.add(regionserver.getServerName());
}
for (String queueId : queueIds) {
ReplicationQueueInfo queueInfo = new ReplicationQueueInfo(queueId);
List wals = queueStorage.getWALsInQueue(regionserver, queueId);
Collections.sort(wals);
if (!peerIds.contains(queueInfo.getPeerId())) {
deletedQueues.add(regionserver + "/" + queueId);
sb.append(formatQueue(regionserver, queueStorage, queueInfo, queueId, wals, true, hdfs));
} else {
sb.append(formatQueue(regionserver, queueStorage, queueInfo, queueId, wals, false, hdfs));
}
}
}
return sb.toString();
}
private String formatQueue(ServerName regionserver, ReplicationQueueStorage queueStorage,
ReplicationQueueInfo queueInfo, String queueId, List wals, boolean isDeleted,
boolean hdfs) throws Exception {
StringBuilder sb = new StringBuilder();
List deadServers;
sb.append("Dumping replication queue info for RegionServer: [" + regionserver + "]" + "\n");
sb.append(" Queue znode: " + queueId + "\n");
sb.append(" PeerID: " + queueInfo.getPeerId() + "\n");
sb.append(" Recovered: " + queueInfo.isQueueRecovered() + "\n");
deadServers = queueInfo.getDeadRegionServers();
if (deadServers.isEmpty()) {
sb.append(" No dead RegionServers found in this queue." + "\n");
} else {
sb.append(" Dead RegionServers: " + deadServers + "\n");
}
sb.append(" Was deleted: " + isDeleted + "\n");
sb.append(" Number of WALs in replication queue: " + wals.size() + "\n");
peersQueueSize.addAndGet(queueInfo.getPeerId(), wals.size());
for (String wal : wals) {
long position = queueStorage.getWALPosition(regionserver, queueInfo.getPeerId(), wal);
sb.append(" Replication position for " + wal + ": " + (position > 0 ? position : "0"
+ " (not started or nothing to replicate)") + "\n");
}
if (hdfs) {
FileSystem fs = FileSystem.get(getConf());
sb.append(" Total size of WALs on HDFS for this queue: "
+ StringUtils.humanSize(getTotalWALSize(fs, wals, regionserver)) + "\n");
}
return sb.toString();
}
/**
* return total size in bytes from a list of WALs
*/
private long getTotalWALSize(FileSystem fs, List wals, ServerName server)
throws IOException {
long size = 0;
FileStatus fileStatus;
for (String wal : wals) {
try {
fileStatus = (new WALLink(getConf(), server.getServerName(), wal)).getFileStatus(fs);
} catch (IOException e) {
if (e instanceof FileNotFoundException) {
numWalsNotFound++;
LOG.warn("WAL " + wal + " couldn't be found, skipping", e);
} else {
LOG.warn("Can't get file status of WAL " + wal + ", skipping", e);
}
continue;
}
size += fileStatus.getLen();
}
totalSizeOfWALs += size;
return size;
}
private static class WarnOnlyAbortable implements Abortable {
@Override
public void abort(String why, Throwable e) {
LOG.warn("DumpReplicationQueue received abort, ignoring. Reason: " + why);
if (LOG.isDebugEnabled()) {
LOG.debug(e.toString(), e);
}
}
@Override
public boolean isAborted() {
return false;
}
}
private static class WarnOnlyStoppable implements Stoppable {
@Override
public void stop(String why) {
LOG.warn("DumpReplicationQueue received stop, ignoring. Reason: " + why);
}
@Override
public boolean isStopped() {
return false;
}
}
}