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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.tool;
import static org.apache.hadoop.hbase.HConstants.DEFAULT_ZOOKEEPER_ZNODE_PARENT;
import static org.apache.hadoop.hbase.HConstants.ZOOKEEPER_ZNODE_PARENT;
import java.io.Closeable;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.Set;
import java.util.TreeSet;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.atomic.LongAdder;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.commons.lang3.time.StopWatch;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.AuthUtil;
import org.apache.hadoop.hbase.ChoreService;
import org.apache.hadoop.hbase.ClusterMetrics;
import org.apache.hadoop.hbase.ClusterMetrics.Option;
import org.apache.hadoop.hbase.DoNotRetryIOException;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HRegionLocation;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.MetaTableAccessor;
import org.apache.hadoop.hbase.NamespaceDescriptor;
import org.apache.hadoop.hbase.ScheduledChore;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.TableNotEnabledException;
import org.apache.hadoop.hbase.TableNotFoundException;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.ColumnFamilyDescriptor;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.RegionInfo;
import org.apache.hadoop.hbase.client.RegionLocator;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.client.TableDescriptor;
import org.apache.hadoop.hbase.filter.FirstKeyOnlyFilter;
import org.apache.hadoop.hbase.tool.Canary.RegionTask.TaskType;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
import org.apache.hadoop.hbase.util.Pair;
import org.apache.hadoop.hbase.util.ReflectionUtils;
import org.apache.hadoop.hbase.util.RegionSplitter;
import org.apache.hadoop.hbase.zookeeper.EmptyWatcher;
import org.apache.hadoop.hbase.zookeeper.ZKConfig;
import org.apache.hadoop.util.GenericOptionsParser;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;
import org.apache.yetus.audience.InterfaceAudience;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.client.ConnectStringParser;
import org.apache.zookeeper.data.Stat;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hbase.thirdparty.com.google.common.collect.Lists;
/**
* HBase Canary Tool for "canary monitoring" of a running HBase cluster.
*
* There are three modes:
*
* - region mode (Default): For each region, try to get one row per column family outputting
* information on failure (ERROR) or else the latency.
*
*
* - regionserver mode: For each regionserver try to get one row from one table selected
* randomly outputting information on failure (ERROR) or else the latency.
*
*
* - zookeeper mode: for each zookeeper instance, selects a znode outputting information on
* failure (ERROR) or else the latency.
*
*
*/
@InterfaceAudience.Private
public final class Canary implements Tool {
/**
* Sink interface used by the canary to output information
*/
public interface Sink {
long getReadFailureCount();
long incReadFailureCount();
Map getReadFailures();
void updateReadFailures(String regionName, String serverName);
long getWriteFailureCount();
long incWriteFailureCount();
Map getWriteFailures();
void updateWriteFailures(String regionName, String serverName);
}
/**
* Simple implementation of canary sink that allows plotting to a file or standard output.
*/
public static class StdOutSink implements Sink {
private AtomicLong readFailureCount = new AtomicLong(0),
writeFailureCount = new AtomicLong(0);
private Map readFailures = new ConcurrentHashMap<>();
private Map writeFailures = new ConcurrentHashMap<>();
@Override
public long getReadFailureCount() {
return readFailureCount.get();
}
@Override
public long incReadFailureCount() {
return readFailureCount.incrementAndGet();
}
@Override
public Map getReadFailures() {
return readFailures;
}
@Override
public void updateReadFailures(String regionName, String serverName) {
readFailures.put(regionName, serverName);
}
@Override
public long getWriteFailureCount() {
return writeFailureCount.get();
}
@Override
public long incWriteFailureCount() {
return writeFailureCount.incrementAndGet();
}
@Override
public Map getWriteFailures() {
return writeFailures;
}
@Override
public void updateWriteFailures(String regionName, String serverName) {
writeFailures.put(regionName, serverName);
}
}
/**
* By RegionServer, for 'regionserver' mode.
*/
public static class RegionServerStdOutSink extends StdOutSink {
public void publishReadFailure(String table, String server) {
incReadFailureCount();
LOG.error("Read from {} on {}", table, server);
}
public void publishReadTiming(String table, String server, long msTime) {
LOG.info("Read from {} on {} in {}ms", table, server, msTime);
}
}
/**
* Output for 'zookeeper' mode.
*/
public static class ZookeeperStdOutSink extends StdOutSink {
public void publishReadFailure(String znode, String server) {
incReadFailureCount();
LOG.error("Read from {} on {}", znode, server);
}
public void publishReadTiming(String znode, String server, long msTime) {
LOG.info("Read from {} on {} in {}ms", znode, server, msTime);
}
}
/**
* By Region, for 'region' mode.
*/
public static class RegionStdOutSink extends StdOutSink {
private Map perTableReadLatency = new HashMap<>();
private LongAdder writeLatency = new LongAdder();
public void publishReadFailure(ServerName serverName, RegionInfo region, Exception e) {
incReadFailureCount();
LOG.error("Read from {} on {} failed", region.getRegionNameAsString(), serverName, e);
}
public void publishReadFailure(ServerName serverName, RegionInfo region,
ColumnFamilyDescriptor column, Exception e) {
incReadFailureCount();
LOG.error("Read from {} on {} {} failed", region.getRegionNameAsString(), serverName,
column.getNameAsString(), e);
}
public void publishReadTiming(ServerName serverName, RegionInfo region,
ColumnFamilyDescriptor column, long msTime) {
LOG.info("Read from {} on {} {} in {}ms", region.getRegionNameAsString(), serverName,
column.getNameAsString(), msTime);
}
public void publishWriteFailure(ServerName serverName, RegionInfo region, Exception e) {
incWriteFailureCount();
LOG.error("Write to {} on {} failed", region.getRegionNameAsString(), serverName, e);
}
public void publishWriteFailure(ServerName serverName, RegionInfo region,
ColumnFamilyDescriptor column, Exception e) {
incWriteFailureCount();
LOG.error("Write to {} on {} {} failed", region.getRegionNameAsString(), serverName,
column.getNameAsString(), e);
}
public void publishWriteTiming(ServerName serverName, RegionInfo region,
ColumnFamilyDescriptor column, long msTime) {
LOG.info("Write to {} on {} {} in {}ms",
region.getRegionNameAsString(), serverName, column.getNameAsString(), msTime);
}
public Map getReadLatencyMap() {
return this.perTableReadLatency;
}
public LongAdder initializeAndGetReadLatencyForTable(String tableName) {
LongAdder initLatency = new LongAdder();
this.perTableReadLatency.put(tableName, initLatency);
return initLatency;
}
public void initializeWriteLatency() {
this.writeLatency.reset();
}
public LongAdder getWriteLatency() {
return this.writeLatency;
}
}
/**
* Run a single zookeeper Task and then exit.
*/
static class ZookeeperTask implements Callable {
private final Connection connection;
private final String host;
private String znode;
private final int timeout;
private ZookeeperStdOutSink sink;
public ZookeeperTask(Connection connection, String host, String znode, int timeout,
ZookeeperStdOutSink sink) {
this.connection = connection;
this.host = host;
this.znode = znode;
this.timeout = timeout;
this.sink = sink;
}
@Override public Void call() throws Exception {
ZooKeeper zooKeeper = null;
try {
zooKeeper = new ZooKeeper(host, timeout, EmptyWatcher.instance);
Stat exists = zooKeeper.exists(znode, false);
StopWatch stopwatch = new StopWatch();
stopwatch.start();
zooKeeper.getData(znode, false, exists);
stopwatch.stop();
sink.publishReadTiming(znode, host, stopwatch.getTime());
} catch (KeeperException | InterruptedException e) {
sink.publishReadFailure(znode, host);
} finally {
if (zooKeeper != null) {
zooKeeper.close();
}
}
return null;
}
}
/**
* Run a single Region Task and then exit. For each column family of the Region, get one row and
* output latency or failure.
*/
static class RegionTask implements Callable {
public enum TaskType{
READ, WRITE
}
private Connection connection;
private RegionInfo region;
private RegionStdOutSink sink;
private TaskType taskType;
private boolean rawScanEnabled;
private ServerName serverName;
private LongAdder readWriteLatency;
RegionTask(Connection connection, RegionInfo region, ServerName serverName,
RegionStdOutSink sink, TaskType taskType, boolean rawScanEnabled, LongAdder rwLatency) {
this.connection = connection;
this.region = region;
this.serverName = serverName;
this.sink = sink;
this.taskType = taskType;
this.rawScanEnabled = rawScanEnabled;
this.readWriteLatency = rwLatency;
}
@Override
public Void call() {
switch (taskType) {
case READ:
return read();
case WRITE:
return write();
default:
return read();
}
}
public Void read() {
Table table = null;
TableDescriptor tableDesc = null;
try {
LOG.debug("Reading table descriptor for table {}", region.getTable());
table = connection.getTable(region.getTable());
tableDesc = table.getDescriptor();
} catch (IOException e) {
LOG.debug("sniffRegion {} of {} failed", region.getEncodedName(), e);
sink.publishReadFailure(serverName, region, e);
if (table != null) {
try {
table.close();
} catch (IOException ioe) {
LOG.error("Close table failed", e);
}
}
return null;
}
byte[] startKey = null;
Get get = null;
Scan scan = null;
ResultScanner rs = null;
StopWatch stopWatch = new StopWatch();
for (ColumnFamilyDescriptor column : tableDesc.getColumnFamilies()) {
stopWatch.reset();
startKey = region.getStartKey();
// Can't do a get on empty start row so do a Scan of first element if any instead.
if (startKey.length > 0) {
get = new Get(startKey);
get.setCacheBlocks(false);
get.setFilter(new FirstKeyOnlyFilter());
get.addFamily(column.getName());
} else {
scan = new Scan();
LOG.debug("rawScan {} for {}", rawScanEnabled, tableDesc.getTableName());
scan.setRaw(rawScanEnabled);
scan.setCaching(1);
scan.setCacheBlocks(false);
scan.setFilter(new FirstKeyOnlyFilter());
scan.addFamily(column.getName());
scan.setMaxResultSize(1L);
scan.setOneRowLimit();
}
LOG.debug("Reading from {} {} {} {}", tableDesc.getTableName(),
region.getRegionNameAsString(), column.getNameAsString(),
Bytes.toStringBinary(startKey));
try {
stopWatch.start();
if (startKey.length > 0) {
table.get(get);
} else {
rs = table.getScanner(scan);
rs.next();
}
stopWatch.stop();
this.readWriteLatency.add(stopWatch.getTime());
sink.publishReadTiming(serverName, region, column, stopWatch.getTime());
} catch (Exception e) {
sink.publishReadFailure(serverName, region, column, e);
sink.updateReadFailures(region.getRegionNameAsString(), serverName.getHostname());
} finally {
if (rs != null) {
rs.close();
}
scan = null;
get = null;
}
}
try {
table.close();
} catch (IOException e) {
LOG.error("Close table failed", e);
}
return null;
}
/**
* Check writes for the canary table
*/
private Void write() {
Table table = null;
TableDescriptor tableDesc = null;
try {
table = connection.getTable(region.getTable());
tableDesc = table.getDescriptor();
byte[] rowToCheck = region.getStartKey();
if (rowToCheck.length == 0) {
rowToCheck = new byte[]{0x0};
}
int writeValueSize =
connection.getConfiguration().getInt(HConstants.HBASE_CANARY_WRITE_VALUE_SIZE_KEY, 10);
for (ColumnFamilyDescriptor column : tableDesc.getColumnFamilies()) {
Put put = new Put(rowToCheck);
byte[] value = new byte[writeValueSize];
Bytes.random(value);
put.addColumn(column.getName(), HConstants.EMPTY_BYTE_ARRAY, value);
LOG.debug("Writing to {} {} {} {}",
tableDesc.getTableName(), region.getRegionNameAsString(), column.getNameAsString(),
Bytes.toStringBinary(rowToCheck));
try {
long startTime = System.currentTimeMillis();
table.put(put);
long time = System.currentTimeMillis() - startTime;
this.readWriteLatency.add(time);
sink.publishWriteTiming(serverName, region, column, time);
} catch (Exception e) {
sink.publishWriteFailure(serverName, region, column, e);
}
}
table.close();
} catch (IOException e) {
sink.publishWriteFailure(serverName, region, e);
sink.updateWriteFailures(region.getRegionNameAsString(), serverName.getHostname() );
}
return null;
}
}
/**
* Run a single RegionServer Task and then exit.
* Get one row from a region on the regionserver and output latency or the failure.
*/
static class RegionServerTask implements Callable {
private Connection connection;
private String serverName;
private RegionInfo region;
private RegionServerStdOutSink sink;
private AtomicLong successes;
RegionServerTask(Connection connection, String serverName, RegionInfo region,
RegionServerStdOutSink sink, AtomicLong successes) {
this.connection = connection;
this.serverName = serverName;
this.region = region;
this.sink = sink;
this.successes = successes;
}
@Override
public Void call() {
TableName tableName = null;
Table table = null;
Get get = null;
byte[] startKey = null;
Scan scan = null;
StopWatch stopWatch = new StopWatch();
// monitor one region on every region server
stopWatch.reset();
try {
tableName = region.getTable();
table = connection.getTable(tableName);
startKey = region.getStartKey();
// Can't do a get on empty start row so do a Scan of first element if any instead.
LOG.debug("Reading from {} {} {} {}",
serverName, region.getTable(), region.getRegionNameAsString(),
Bytes.toStringBinary(startKey));
if (startKey.length > 0) {
get = new Get(startKey);
get.setCacheBlocks(false);
get.setFilter(new FirstKeyOnlyFilter());
stopWatch.start();
table.get(get);
stopWatch.stop();
} else {
scan = new Scan();
scan.setCacheBlocks(false);
scan.setFilter(new FirstKeyOnlyFilter());
scan.setCaching(1);
scan.setMaxResultSize(1L);
scan.setOneRowLimit();
stopWatch.start();
ResultScanner s = table.getScanner(scan);
s.next();
s.close();
stopWatch.stop();
}
successes.incrementAndGet();
sink.publishReadTiming(tableName.getNameAsString(), serverName, stopWatch.getTime());
} catch (TableNotFoundException tnfe) {
LOG.error("Table may be deleted", tnfe);
// This is ignored because it doesn't imply that the regionserver is dead
} catch (TableNotEnabledException tnee) {
// This is considered a success since we got a response.
successes.incrementAndGet();
LOG.debug("The targeted table was disabled. Assuming success.");
} catch (DoNotRetryIOException dnrioe) {
sink.publishReadFailure(tableName.getNameAsString(), serverName);
LOG.error(dnrioe.toString(), dnrioe);
} catch (IOException e) {
sink.publishReadFailure(tableName.getNameAsString(), serverName);
LOG.error(e.toString(), e);
} finally {
if (table != null) {
try {
table.close();
} catch (IOException e) {/* DO NOTHING */
LOG.error("Close table failed", e);
}
}
scan = null;
get = null;
startKey = null;
}
return null;
}
}
private static final int USAGE_EXIT_CODE = 1;
private static final int INIT_ERROR_EXIT_CODE = 2;
private static final int TIMEOUT_ERROR_EXIT_CODE = 3;
private static final int ERROR_EXIT_CODE = 4;
private static final int FAILURE_EXIT_CODE = 5;
private static final long DEFAULT_INTERVAL = 60000;
private static final long DEFAULT_TIMEOUT = 600000; // 10 mins
private static final int MAX_THREADS_NUM = 16; // #threads to contact regions
private static final Logger LOG = LoggerFactory.getLogger(Canary.class);
public static final TableName DEFAULT_WRITE_TABLE_NAME = TableName.valueOf(
NamespaceDescriptor.SYSTEM_NAMESPACE_NAME_STR, "canary");
private static final String CANARY_TABLE_FAMILY_NAME = "Test";
private Configuration conf = null;
private long interval = 0;
private Sink sink = null;
private boolean useRegExp;
private long timeout = DEFAULT_TIMEOUT;
private boolean failOnError = true;
/**
* True if we are to run in 'regionServer' mode.
*/
private boolean regionServerMode = false;
/**
* True if we are to run in zookeeper 'mode'.
*/
private boolean zookeeperMode = false;
private boolean regionServerAllRegions = false;
private boolean writeSniffing = false;
private long configuredWriteTableTimeout = DEFAULT_TIMEOUT;
private boolean treatFailureAsError = false;
private TableName writeTableName = DEFAULT_WRITE_TABLE_NAME;
/**
* This is a Map of table to timeout. The timeout is for reading all regions in the table; i.e.
* we aggregate time to fetch each region and it needs to be less than this value else we
* log an ERROR.
*/
private HashMap configuredReadTableTimeouts = new HashMap<>();
private ExecutorService executor; // threads to retrieve data from regionservers
public Canary() {
this(new ScheduledThreadPoolExecutor(1));
}
public Canary(ExecutorService executor) {
this(executor, null);
}
@VisibleForTesting
Canary(ExecutorService executor, Sink sink) {
this.executor = executor;
this.sink = sink;
}
@Override
public Configuration getConf() {
return conf;
}
@Override
public void setConf(Configuration conf) {
this.conf = conf;
}
private int parseArgs(String[] args) {
int index = -1;
// Process command line args
for (int i = 0; i < args.length; i++) {
String cmd = args[i];
if (cmd.startsWith("-")) {
if (index >= 0) {
// command line args must be in the form: [opts] [table 1 [table 2 ...]]
System.err.println("Invalid command line options");
printUsageAndExit();
}
if (cmd.equals("-help") || cmd.equals("-h")) {
// user asked for help, print the help and quit.
printUsageAndExit();
} else if (cmd.equals("-daemon") && interval == 0) {
// user asked for daemon mode, set a default interval between checks
interval = DEFAULT_INTERVAL;
} else if (cmd.equals("-interval")) {
// user has specified an interval for canary breaths (-interval N)
i++;
if (i == args.length) {
System.err.println("-interval takes a numeric seconds value argument.");
printUsageAndExit();
}
try {
interval = Long.parseLong(args[i]) * 1000;
} catch (NumberFormatException e) {
System.err.println("-interval needs a numeric value argument.");
printUsageAndExit();
}
} else if (cmd.equals("-zookeeper")) {
this.zookeeperMode = true;
} else if(cmd.equals("-regionserver")) {
this.regionServerMode = true;
} else if(cmd.equals("-allRegions")) {
this.regionServerAllRegions = true;
} else if(cmd.equals("-writeSniffing")) {
this.writeSniffing = true;
} else if(cmd.equals("-treatFailureAsError") || cmd.equals("-failureAsError")) {
this.treatFailureAsError = true;
} else if (cmd.equals("-e")) {
this.useRegExp = true;
} else if (cmd.equals("-t")) {
i++;
if (i == args.length) {
System.err.println("-t takes a numeric milliseconds value argument.");
printUsageAndExit();
}
try {
this.timeout = Long.parseLong(args[i]);
} catch (NumberFormatException e) {
System.err.println("-t takes a numeric milliseconds value argument.");
printUsageAndExit();
}
} else if(cmd.equals("-writeTableTimeout")) {
i++;
if (i == args.length) {
System.err.println("-writeTableTimeout takes a numeric milliseconds value argument.");
printUsageAndExit();
}
try {
this.configuredWriteTableTimeout = Long.parseLong(args[i]);
} catch (NumberFormatException e) {
System.err.println("-writeTableTimeout takes a numeric milliseconds value argument.");
printUsageAndExit();
}
} else if (cmd.equals("-writeTable")) {
i++;
if (i == args.length) {
System.err.println("-writeTable takes a string tablename value argument.");
printUsageAndExit();
}
this.writeTableName = TableName.valueOf(args[i]);
} else if (cmd.equals("-f")) {
i++;
if (i == args.length) {
System.err
.println("-f needs a boolean value argument (true|false).");
printUsageAndExit();
}
this.failOnError = Boolean.parseBoolean(args[i]);
} else if (cmd.equals("-readTableTimeouts")) {
i++;
if (i == args.length) {
System.err.println("-readTableTimeouts needs a comma-separated list of read " +
"millisecond timeouts per table (without spaces).");
printUsageAndExit();
}
String [] tableTimeouts = args[i].split(",");
for (String tT: tableTimeouts) {
String [] nameTimeout = tT.split("=");
if (nameTimeout.length < 2) {
System.err.println("Each -readTableTimeouts argument must be of the form " +
"= (without spaces).");
printUsageAndExit();
}
long timeoutVal = 0L;
try {
timeoutVal = Long.parseLong(nameTimeout[1]);
} catch (NumberFormatException e) {
System.err.println("-readTableTimeouts read timeout for each table must be a numeric value argument.");
printUsageAndExit();
}
this.configuredReadTableTimeouts.put(nameTimeout[0], timeoutVal);
}
} else {
// no options match
System.err.println(cmd + " options is invalid.");
printUsageAndExit();
}
} else if (index < 0) {
// keep track of first table name specified by the user
index = i;
}
}
if (this.regionServerAllRegions && !this.regionServerMode) {
System.err.println("-allRegions can only be specified in regionserver mode.");
printUsageAndExit();
}
if (this.zookeeperMode) {
if (this.regionServerMode || this.regionServerAllRegions || this.writeSniffing) {
System.err.println("-zookeeper is exclusive and cannot be combined with "
+ "other modes.");
printUsageAndExit();
}
}
if (!this.configuredReadTableTimeouts.isEmpty() && (this.regionServerMode || this.zookeeperMode)) {
System.err.println("-readTableTimeouts can only be configured in region mode.");
printUsageAndExit();
}
return index;
}
@Override
public int run(String[] args) throws Exception {
int index = parseArgs(args);
ChoreService choreService = null;
// Launches chore for refreshing kerberos credentials if security is enabled.
// Please see http://hbase.apache.org/book.html#_running_canary_in_a_kerberos_enabled_cluster
// for more details.
final ScheduledChore authChore = AuthUtil.getAuthChore(conf);
if (authChore != null) {
choreService = new ChoreService("CANARY_TOOL");
choreService.scheduleChore(authChore);
}
// Start to prepare the stuffs
Monitor monitor = null;
Thread monitorThread = null;
long startTime = 0;
long currentTimeLength = 0;
// Get a connection to use in below.
try (Connection connection = ConnectionFactory.createConnection(this.conf)) {
do {
// Do monitor !!
try {
monitor = this.newMonitor(connection, index, args);
monitorThread = new Thread(monitor, "CanaryMonitor-" + System.currentTimeMillis());
startTime = System.currentTimeMillis();
monitorThread.start();
while (!monitor.isDone()) {
// wait for 1 sec
Thread.sleep(1000);
// exit if any error occurs
if (this.failOnError && monitor.hasError()) {
monitorThread.interrupt();
if (monitor.initialized) {
return monitor.errorCode;
} else {
return INIT_ERROR_EXIT_CODE;
}
}
currentTimeLength = System.currentTimeMillis() - startTime;
if (currentTimeLength > this.timeout) {
LOG.error("The monitor is running too long (" + currentTimeLength
+ ") after timeout limit:" + this.timeout
+ " will be killed itself !!");
if (monitor.initialized) {
return TIMEOUT_ERROR_EXIT_CODE;
} else {
return INIT_ERROR_EXIT_CODE;
}
}
}
if (this.failOnError && monitor.finalCheckForErrors()) {
monitorThread.interrupt();
return monitor.errorCode;
}
} finally {
if (monitor != null) monitor.close();
}
Thread.sleep(interval);
} while (interval > 0);
} // try-with-resources close
if (choreService != null) {
choreService.shutdown();
}
return monitor.errorCode;
}
public Map getReadFailures() {
return sink.getReadFailures();
}
public Map getWriteFailures() {
return sink.getWriteFailures();
}
private void printUsageAndExit() {
System.err.println(
"Usage: canary [OPTIONS] [ [ [ interval between checks in seconds");
System.err.println(" -e consider table/regionserver argument as regular " +
"expression");
System.err.println(" -f exit on first error; default=true");
System.err.println(" -failureAsError treat read/write failure as error");
System.err.println(" -t timeout for canary-test run; default=600000ms");
System.err.println(" -writeSniffing enable write sniffing");
System.err.println(" -writeTable the table used for write sniffing; default=hbase:canary");
System.err.println(" -writeTableTimeout timeout for writeTable; default=600000ms");
System.err.println(" -readTableTimeouts =," +
"=,...");
System.err.println(" comma-separated list of table read timeouts " +
"(no spaces);");
System.err.println(" logs 'ERROR' if takes longer. default=600000ms");
System.err.println("");
System.err.println(" -D= to assign or override configuration params");
System.err.println(" -Dhbase.canary.read.raw.enabled= Set to enable/disable " +
"raw scan; default=false");
System.err.println("");
System.err.println("Canary runs in one of three modes: region (default), regionserver, or " +
"zookeeper.");
System.err.println("To sniff/probe all regions, pass no arguments.");
System.err.println("To sniff/probe all regions of a table, pass tablename.");
System.err.println("To sniff/probe regionservers, pass -regionserver, etc.");
System.err.println("See http://hbase.apache.org/book.html#_canary for Canary documentation.");
System.exit(USAGE_EXIT_CODE);
}
Sink getSink(Configuration configuration, Class clazz) {
// In test context, this.sink might be set. Use it if non-null. For testing.
return this.sink != null? this.sink:
(Sink)ReflectionUtils.newInstance(configuration.getClass("hbase.canary.sink.class",
clazz, Sink.class));
}
/**
* A Factory method for {@link Monitor}.
* Makes a RegionServerMonitor, or a ZooKeeperMonitor, or a RegionMonitor.
* @param index a start index for monitor target
* @param args args passed from user
* @return a Monitor instance
*/
public Monitor newMonitor(final Connection connection, int index, String[] args) {
Monitor monitor = null;
String[] monitorTargets = null;
if (index >= 0) {
int length = args.length - index;
monitorTargets = new String[length];
System.arraycopy(args, index, monitorTargets, 0, length);
}
if (this.regionServerMode) {
monitor =
new RegionServerMonitor(connection, monitorTargets, this.useRegExp,
getSink(connection.getConfiguration(), RegionServerStdOutSink.class),
this.executor, this.regionServerAllRegions,
this.treatFailureAsError);
} else if (this.zookeeperMode) {
monitor =
new ZookeeperMonitor(connection, monitorTargets, this.useRegExp,
getSink(connection.getConfiguration(), ZookeeperStdOutSink.class),
this.executor, this.treatFailureAsError);
} else {
monitor =
new RegionMonitor(connection, monitorTargets, this.useRegExp,
getSink(connection.getConfiguration(), RegionStdOutSink.class),
this.executor, this.writeSniffing,
this.writeTableName, this.treatFailureAsError, this.configuredReadTableTimeouts,
this.configuredWriteTableTimeout);
}
return monitor;
}
/**
* A Monitor super-class can be extended by users
*/
public static abstract class Monitor implements Runnable, Closeable {
protected Connection connection;
protected Admin admin;
/**
* 'Target' dependent on 'mode'. Could be Tables or RegionServers or ZNodes.
* Passed on the command-line as arguments.
*/
protected String[] targets;
protected boolean useRegExp;
protected boolean treatFailureAsError;
protected boolean initialized = false;
protected boolean done = false;
protected int errorCode = 0;
protected Sink sink;
protected ExecutorService executor;
public boolean isDone() {
return done;
}
public boolean hasError() {
return errorCode != 0;
}
public boolean finalCheckForErrors() {
if (errorCode != 0) {
return true;
}
if (treatFailureAsError &&
(sink.getReadFailureCount() > 0 || sink.getWriteFailureCount() > 0)) {
errorCode = FAILURE_EXIT_CODE;
return true;
}
return false;
}
@Override
public void close() throws IOException {
if (this.admin != null) this.admin.close();
}
protected Monitor(Connection connection, String[] monitorTargets, boolean useRegExp, Sink sink,
ExecutorService executor, boolean treatFailureAsError) {
if (null == connection) throw new IllegalArgumentException("connection shall not be null");
this.connection = connection;
this.targets = monitorTargets;
this.useRegExp = useRegExp;
this.treatFailureAsError = treatFailureAsError;
this.sink = sink;
this.executor = executor;
}
@Override
public abstract void run();
protected boolean initAdmin() {
if (null == this.admin) {
try {
this.admin = this.connection.getAdmin();
} catch (Exception e) {
LOG.error("Initial HBaseAdmin failed...", e);
this.errorCode = INIT_ERROR_EXIT_CODE;
}
} else if (admin.isAborted()) {
LOG.error("HBaseAdmin aborted");
this.errorCode = INIT_ERROR_EXIT_CODE;
}
return !this.hasError();
}
}
/**
* A monitor for region mode.
*/
private static class RegionMonitor extends Monitor {
// 10 minutes
private static final int DEFAULT_WRITE_TABLE_CHECK_PERIOD = 10 * 60 * 1000;
// 1 days
private static final int DEFAULT_WRITE_DATA_TTL = 24 * 60 * 60;
private long lastCheckTime = -1;
private boolean writeSniffing;
private TableName writeTableName;
private int writeDataTTL;
private float regionsLowerLimit;
private float regionsUpperLimit;
private int checkPeriod;
private boolean rawScanEnabled;
/**
* This is a timeout per table. If read of each region in the table aggregated takes longer
* than what is configured here, we log an ERROR rather than just an INFO.
*/
private HashMap configuredReadTableTimeouts;
private long configuredWriteTableTimeout;
public RegionMonitor(Connection connection, String[] monitorTargets, boolean useRegExp,
Sink sink, ExecutorService executor, boolean writeSniffing, TableName writeTableName,
boolean treatFailureAsError, HashMap configuredReadTableTimeouts,
long configuredWriteTableTimeout) {
super(connection, monitorTargets, useRegExp, sink, executor, treatFailureAsError);
Configuration conf = connection.getConfiguration();
this.writeSniffing = writeSniffing;
this.writeTableName = writeTableName;
this.writeDataTTL =
conf.getInt(HConstants.HBASE_CANARY_WRITE_DATA_TTL_KEY, DEFAULT_WRITE_DATA_TTL);
this.regionsLowerLimit =
conf.getFloat(HConstants.HBASE_CANARY_WRITE_PERSERVER_REGIONS_LOWERLIMIT_KEY, 1.0f);
this.regionsUpperLimit =
conf.getFloat(HConstants.HBASE_CANARY_WRITE_PERSERVER_REGIONS_UPPERLIMIT_KEY, 1.5f);
this.checkPeriod =
conf.getInt(HConstants.HBASE_CANARY_WRITE_TABLE_CHECK_PERIOD_KEY,
DEFAULT_WRITE_TABLE_CHECK_PERIOD);
this.rawScanEnabled = conf.getBoolean(HConstants.HBASE_CANARY_READ_RAW_SCAN_KEY, false);
this.configuredReadTableTimeouts = new HashMap<>(configuredReadTableTimeouts);
this.configuredWriteTableTimeout = configuredWriteTableTimeout;
}
private RegionStdOutSink getSink() {
if (!(sink instanceof RegionStdOutSink)) {
throw new RuntimeException("Can only write to Region sink");
}
return ((RegionStdOutSink) sink);
}
@Override
public void run() {
if (this.initAdmin()) {
try {
List> taskFutures = new LinkedList<>();
RegionStdOutSink regionSink = this.getSink();
if (this.targets != null && this.targets.length > 0) {
String[] tables = generateMonitorTables(this.targets);
// Check to see that each table name passed in the -readTableTimeouts argument is also
// passed as a monitor target.
if (!new HashSet<>(Arrays.asList(tables)).
containsAll(this.configuredReadTableTimeouts.keySet())) {
LOG.error("-readTableTimeouts can only specify read timeouts for monitor targets " +
"passed via command line.");
this.errorCode = USAGE_EXIT_CODE;
return;
}
this.initialized = true;
for (String table : tables) {
LongAdder readLatency = regionSink.initializeAndGetReadLatencyForTable(table);
taskFutures.addAll(Canary.sniff(admin, regionSink, table, executor, TaskType.READ,
this.rawScanEnabled, readLatency));
}
} else {
taskFutures.addAll(sniff(TaskType.READ, regionSink));
}
if (writeSniffing) {
if (EnvironmentEdgeManager.currentTime() - lastCheckTime > checkPeriod) {
try {
checkWriteTableDistribution();
} catch (IOException e) {
LOG.error("Check canary table distribution failed!", e);
}
lastCheckTime = EnvironmentEdgeManager.currentTime();
}
// sniff canary table with write operation
regionSink.initializeWriteLatency();
LongAdder writeTableLatency = regionSink.getWriteLatency();
taskFutures.addAll(Canary.sniff(admin, regionSink, admin.getDescriptor(writeTableName),
executor, TaskType.WRITE, this.rawScanEnabled, writeTableLatency));
}
for (Future future : taskFutures) {
try {
future.get();
} catch (ExecutionException e) {
LOG.error("Sniff region failed!", e);
}
}
Map actualReadTableLatency = regionSink.getReadLatencyMap();
for (Map.Entry entry : configuredReadTableTimeouts.entrySet()) {
String tableName = entry.getKey();
if (actualReadTableLatency.containsKey(tableName)) {
Long actual = actualReadTableLatency.get(tableName).longValue();
Long configured = entry.getValue();
if (actual > configured) {
LOG.error("Read operation for {} took {}ms (Configured read timeout {}ms.",
tableName, actual, configured);
} else {
LOG.info("Read operation for {} took {}ms (Configured read timeout {}ms.",
tableName, actual, configured);
}
} else {
LOG.error("Read operation for {} failed!", tableName);
}
}
if (this.writeSniffing) {
String writeTableStringName = this.writeTableName.getNameAsString();
long actualWriteLatency = regionSink.getWriteLatency().longValue();
LOG.info("Write operation for {} took {}ms. Configured write timeout {}ms.",
writeTableStringName, actualWriteLatency, this.configuredWriteTableTimeout);
// Check that the writeTable write operation latency does not exceed the configured timeout.
if (actualWriteLatency > this.configuredWriteTableTimeout) {
LOG.error("Write operation for {} exceeded the configured write timeout.",
writeTableStringName);
}
}
} catch (Exception e) {
LOG.error("Run regionMonitor failed", e);
this.errorCode = ERROR_EXIT_CODE;
} finally {
this.done = true;
}
}
this.done = true;
}
/**
* @return List of tables to use in test.
*/
private String[] generateMonitorTables(String[] monitorTargets) throws IOException {
String[] returnTables = null;
if (this.useRegExp) {
Pattern pattern = null;
TableDescriptor[] tds = null;
Set tmpTables = new TreeSet<>();
try {
LOG.debug(String.format("reading list of tables"));
tds = this.admin.listTables(pattern);
if (tds == null) {
tds = new TableDescriptor[0];
}
for (String monitorTarget : monitorTargets) {
pattern = Pattern.compile(monitorTarget);
for (TableDescriptor td : tds) {
if (pattern.matcher(td.getTableName().getNameAsString()).matches()) {
tmpTables.add(td.getTableName().getNameAsString());
}
}
}
} catch (IOException e) {
LOG.error("Communicate with admin failed", e);
throw e;
}
if (tmpTables.size() > 0) {
returnTables = tmpTables.toArray(new String[tmpTables.size()]);
} else {
String msg = "No HTable found, tablePattern:" + Arrays.toString(monitorTargets);
LOG.error(msg);
this.errorCode = INIT_ERROR_EXIT_CODE;
throw new TableNotFoundException(msg);
}
} else {
returnTables = monitorTargets;
}
return returnTables;
}
/*
* Canary entry point to monitor all the tables.
*/
private List> sniff(TaskType taskType, RegionStdOutSink regionSink)
throws Exception {
LOG.debug("Reading list of tables");
List> taskFutures = new LinkedList<>();
for (TableDescriptor td: admin.listTableDescriptors()) {
if (admin.isTableEnabled(td.getTableName()) &&
(!td.getTableName().equals(writeTableName))) {
LongAdder readLatency =
regionSink.initializeAndGetReadLatencyForTable(td.getTableName().getNameAsString());
taskFutures.addAll(Canary.sniff(admin, sink, td, executor, taskType, this.rawScanEnabled,
readLatency));
}
}
return taskFutures;
}
private void checkWriteTableDistribution() throws IOException {
if (!admin.tableExists(writeTableName)) {
int numberOfServers =
admin.getClusterMetrics(EnumSet.of(Option.LIVE_SERVERS)).getLiveServerMetrics().size();
if (numberOfServers == 0) {
throw new IllegalStateException("No live regionservers");
}
createWriteTable(numberOfServers);
}
if (!admin.isTableEnabled(writeTableName)) {
admin.enableTable(writeTableName);
}
ClusterMetrics status =
admin.getClusterMetrics(EnumSet.of(Option.LIVE_SERVERS, Option.MASTER));
int numberOfServers = status.getLiveServerMetrics().size();
if (status.getLiveServerMetrics().containsKey(status.getMasterName())) {
numberOfServers -= 1;
}
List> pairs =
MetaTableAccessor.getTableRegionsAndLocations(connection, writeTableName);
int numberOfRegions = pairs.size();
if (numberOfRegions < numberOfServers * regionsLowerLimit
|| numberOfRegions > numberOfServers * regionsUpperLimit) {
admin.disableTable(writeTableName);
admin.deleteTable(writeTableName);
createWriteTable(numberOfServers);
}
HashSet serverSet = new HashSet<>();
for (Pair pair : pairs) {
serverSet.add(pair.getSecond());
}
int numberOfCoveredServers = serverSet.size();
if (numberOfCoveredServers < numberOfServers) {
admin.balancer();
}
}
private void createWriteTable(int numberOfServers) throws IOException {
int numberOfRegions = (int)(numberOfServers * regionsLowerLimit);
LOG.info("Number of live regionservers {}, pre-splitting the canary table into {} regions " +
"(current lower limit of regions per server is {} and you can change it with config {}).",
numberOfServers, numberOfRegions, regionsLowerLimit,
HConstants.HBASE_CANARY_WRITE_PERSERVER_REGIONS_LOWERLIMIT_KEY);
HTableDescriptor desc = new HTableDescriptor(writeTableName);
HColumnDescriptor family = new HColumnDescriptor(CANARY_TABLE_FAMILY_NAME);
family.setMaxVersions(1);
family.setTimeToLive(writeDataTTL);
desc.addFamily(family);
byte[][] splits = new RegionSplitter.HexStringSplit().split(numberOfRegions);
admin.createTable(desc, splits);
}
}
/**
* Canary entry point for specified table.
* @throws Exception
*/
private static List> sniff(final Admin admin, final Sink sink, String tableName,
ExecutorService executor, TaskType taskType, boolean rawScanEnabled, LongAdder readLatency)
throws Exception {
LOG.debug("Checking table is enabled and getting table descriptor for table {}", tableName);
if (admin.isTableEnabled(TableName.valueOf(tableName))) {
return Canary.sniff(admin, sink, admin.getDescriptor(TableName.valueOf(tableName)),
executor, taskType, rawScanEnabled, readLatency);
} else {
LOG.warn("Table {} is not enabled", tableName);
}
return new LinkedList<>();
}
/*
* Loops over regions of this table, and outputs information about the state.
*/
private static List> sniff(final Admin admin, final Sink sink,
TableDescriptor tableDesc, ExecutorService executor, TaskType taskType,
boolean rawScanEnabled, LongAdder rwLatency) throws Exception {
LOG.debug("Reading list of regions for table {}", tableDesc.getTableName());
try (Table table = admin.getConnection().getTable(tableDesc.getTableName())) {
List tasks = new ArrayList<>();
try (RegionLocator regionLocator =
admin.getConnection().getRegionLocator(tableDesc.getTableName())) {
for (HRegionLocation location: regionLocator.getAllRegionLocations()) {
ServerName rs = location.getServerName();
RegionInfo region = location.getRegion();
tasks.add(new RegionTask(admin.getConnection(), region, rs, (RegionStdOutSink)sink,
taskType, rawScanEnabled, rwLatency));
}
return executor.invokeAll(tasks);
}
} catch (TableNotFoundException e) {
return Collections.EMPTY_LIST;
}
}
// monitor for zookeeper mode
private static class ZookeeperMonitor extends Monitor {
private List hosts;
private final String znode;
private final int timeout;
protected ZookeeperMonitor(Connection connection, String[] monitorTargets, boolean useRegExp,
Sink sink, ExecutorService executor, boolean treatFailureAsError) {
super(connection, monitorTargets, useRegExp,
sink, executor, treatFailureAsError);
Configuration configuration = connection.getConfiguration();
znode =
configuration.get(ZOOKEEPER_ZNODE_PARENT,
DEFAULT_ZOOKEEPER_ZNODE_PARENT);
timeout = configuration
.getInt(HConstants.ZK_SESSION_TIMEOUT, HConstants.DEFAULT_ZK_SESSION_TIMEOUT);
ConnectStringParser parser =
new ConnectStringParser(ZKConfig.getZKQuorumServersString(configuration));
hosts = Lists.newArrayList();
for (InetSocketAddress server : parser.getServerAddresses()) {
hosts.add(server.toString());
}
}
@Override public void run() {
List tasks = Lists.newArrayList();
ZookeeperStdOutSink zkSink = null;
try {
zkSink = this.getSink();
} catch (RuntimeException e) {
LOG.error("Run ZooKeeperMonitor failed!", e);
this.errorCode = ERROR_EXIT_CODE;
}
this.initialized = true;
for (final String host : hosts) {
tasks.add(new ZookeeperTask(connection, host, znode, timeout, zkSink));
}
try {
for (Future future : this.executor.invokeAll(tasks)) {
try {
future.get();
} catch (ExecutionException e) {
LOG.error("Sniff zookeeper failed!", e);
this.errorCode = ERROR_EXIT_CODE;
}
}
} catch (InterruptedException e) {
this.errorCode = ERROR_EXIT_CODE;
Thread.currentThread().interrupt();
LOG.error("Sniff zookeeper interrupted!", e);
}
this.done = true;
}
private ZookeeperStdOutSink getSink() {
if (!(sink instanceof ZookeeperStdOutSink)) {
throw new RuntimeException("Can only write to zookeeper sink");
}
return ((ZookeeperStdOutSink) sink);
}
}
/**
* A monitor for regionserver mode
*/
private static class RegionServerMonitor extends Monitor {
private boolean allRegions;
public RegionServerMonitor(Connection connection, String[] monitorTargets, boolean useRegExp,
Sink sink, ExecutorService executor, boolean allRegions,
boolean treatFailureAsError) {
super(connection, monitorTargets, useRegExp, sink, executor, treatFailureAsError);
this.allRegions = allRegions;
}
private RegionServerStdOutSink getSink() {
if (!(sink instanceof RegionServerStdOutSink)) {
throw new RuntimeException("Can only write to regionserver sink");
}
return ((RegionServerStdOutSink) sink);
}
@Override
public void run() {
if (this.initAdmin() && this.checkNoTableNames()) {
RegionServerStdOutSink regionServerSink = null;
try {
regionServerSink = this.getSink();
} catch (RuntimeException e) {
LOG.error("Run RegionServerMonitor failed!", e);
this.errorCode = ERROR_EXIT_CODE;
}
Map> rsAndRMap = this.filterRegionServerByName();
this.initialized = true;
this.monitorRegionServers(rsAndRMap, regionServerSink);
}
this.done = true;
}
private boolean checkNoTableNames() {
List foundTableNames = new ArrayList<>();
TableName[] tableNames = null;
LOG.debug("Reading list of tables");
try {
tableNames = this.admin.listTableNames();
} catch (IOException e) {
LOG.error("Get listTableNames failed", e);
this.errorCode = INIT_ERROR_EXIT_CODE;
return false;
}
if (this.targets == null || this.targets.length == 0) return true;
for (String target : this.targets) {
for (TableName tableName : tableNames) {
if (target.equals(tableName.getNameAsString())) {
foundTableNames.add(target);
}
}
}
if (foundTableNames.size() > 0) {
System.err.println("Cannot pass a tablename when using the -regionserver " +
"option, tablenames:" + foundTableNames.toString());
this.errorCode = USAGE_EXIT_CODE;
}
return foundTableNames.isEmpty();
}
private void monitorRegionServers(Map> rsAndRMap, RegionServerStdOutSink regionServerSink) {
List tasks = new ArrayList<>();
Map successMap = new HashMap<>();
Random rand = new Random();
for (Map.Entry> entry : rsAndRMap.entrySet()) {
String serverName = entry.getKey();
AtomicLong successes = new AtomicLong(0);
successMap.put(serverName, successes);
if (entry.getValue().isEmpty()) {
LOG.error("Regionserver not serving any regions - {}", serverName);
} else if (this.allRegions) {
for (RegionInfo region : entry.getValue()) {
tasks.add(new RegionServerTask(this.connection,
serverName,
region,
regionServerSink,
successes));
}
} else {
// random select a region if flag not set
RegionInfo region = entry.getValue().get(rand.nextInt(entry.getValue().size()));
tasks.add(new RegionServerTask(this.connection,
serverName,
region,
regionServerSink,
successes));
}
}
try {
for (Future future : this.executor.invokeAll(tasks)) {
try {
future.get();
} catch (ExecutionException e) {
LOG.error("Sniff regionserver failed!", e);
this.errorCode = ERROR_EXIT_CODE;
}
}
if (this.allRegions) {
for (Map.Entry> entry : rsAndRMap.entrySet()) {
String serverName = entry.getKey();
LOG.info("Successfully read {} regions out of {} on regionserver {}",
successMap.get(serverName), entry.getValue().size(), serverName);
}
}
} catch (InterruptedException e) {
this.errorCode = ERROR_EXIT_CODE;
LOG.error("Sniff regionserver interrupted!", e);
}
}
private Map> filterRegionServerByName() {
Map> regionServerAndRegionsMap = this.getAllRegionServerByName();
regionServerAndRegionsMap = this.doFilterRegionServerByName(regionServerAndRegionsMap);
return regionServerAndRegionsMap;
}
private Map> getAllRegionServerByName() {
Map> rsAndRMap = new HashMap<>();
try {
LOG.debug("Reading list of tables and locations");
List tableDescs = this.admin.listTableDescriptors();
List regions = null;
for (TableDescriptor tableDesc: tableDescs) {
try (RegionLocator regionLocator =
this.admin.getConnection().getRegionLocator(tableDesc.getTableName())) {
for (HRegionLocation location : regionLocator.getAllRegionLocations()) {
ServerName rs = location.getServerName();
String rsName = rs.getHostname();
RegionInfo r = location.getRegion();
if (rsAndRMap.containsKey(rsName)) {
regions = rsAndRMap.get(rsName);
} else {
regions = new ArrayList<>();
rsAndRMap.put(rsName, regions);
}
regions.add(r);
}
}
}
// get any live regionservers not serving any regions
for (ServerName rs: this.admin.getClusterMetrics(EnumSet.of(Option.LIVE_SERVERS))
.getLiveServerMetrics().keySet()) {
String rsName = rs.getHostname();
if (!rsAndRMap.containsKey(rsName)) {
rsAndRMap.put(rsName, Collections. emptyList());
}
}
} catch (IOException e) {
LOG.error("Get HTables info failed", e);
this.errorCode = INIT_ERROR_EXIT_CODE;
}
return rsAndRMap;
}
private Map> doFilterRegionServerByName(
Map> fullRsAndRMap) {
Map> filteredRsAndRMap = null;
if (this.targets != null && this.targets.length > 0) {
filteredRsAndRMap = new HashMap<>();
Pattern pattern = null;
Matcher matcher = null;
boolean regExpFound = false;
for (String rsName : this.targets) {
if (this.useRegExp) {
regExpFound = false;
pattern = Pattern.compile(rsName);
for (Map.Entry> entry : fullRsAndRMap.entrySet()) {
matcher = pattern.matcher(entry.getKey());
if (matcher.matches()) {
filteredRsAndRMap.put(entry.getKey(), entry.getValue());
regExpFound = true;
}
}
if (!regExpFound) {
LOG.info("No RegionServerInfo found, regionServerPattern {}", rsName);
}
} else {
if (fullRsAndRMap.containsKey(rsName)) {
filteredRsAndRMap.put(rsName, fullRsAndRMap.get(rsName));
} else {
LOG.info("No RegionServerInfo found, regionServerName {}", rsName);
}
}
}
} else {
filteredRsAndRMap = fullRsAndRMap;
}
return filteredRsAndRMap;
}
}
public static void main(String[] args) throws Exception {
final Configuration conf = HBaseConfiguration.create();
// Loading the generic options to conf
new GenericOptionsParser(conf, args);
int numThreads = conf.getInt("hbase.canary.threads.num", MAX_THREADS_NUM);
LOG.info("Execution thread count={}", numThreads);
int exitCode = 0;
ExecutorService executor = new ScheduledThreadPoolExecutor(numThreads);
try {
exitCode = ToolRunner.run(conf, new Canary(executor), args);
} finally {
executor.shutdown();
}
System.exit(exitCode);
}
}