/**
* 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.regionserver;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.hbase.CompatibilitySingletonFactory;
import org.apache.hadoop.hbase.HDFSBlocksDistribution;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.io.hfile.BlockCache;
import org.apache.hadoop.hbase.io.hfile.CacheConfig;
import org.apache.hadoop.hbase.io.hfile.CacheStats;
import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
import org.apache.hadoop.metrics2.MetricsExecutor;
import java.util.Collection;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
/**
* Impl for exposing HRegionServer Information through Hadoop's metrics 2 system.
*/
@InterfaceAudience.Private
class MetricsRegionServerWrapperImpl
implements MetricsRegionServerWrapper {
public static final Log LOG = LogFactory.getLog(MetricsRegionServerWrapperImpl.class);
public static final int PERIOD = 15;
private final HRegionServer regionServer;
private BlockCache blockCache;
private volatile long numStores = 0;
private volatile long numStoreFiles = 0;
private volatile long memstoreSize = 0;
private volatile long storeFileSize = 0;
private volatile double requestsPerSecond = 0.0;
private volatile long readRequestsCount = 0;
private volatile long writeRequestsCount = 0;
private volatile long checkAndMutateChecksFailed = 0;
private volatile long checkAndMutateChecksPassed = 0;
private volatile long storefileIndexSize = 0;
private volatile long totalStaticIndexSize = 0;
private volatile long totalStaticBloomSize = 0;
private volatile long numMutationsWithoutWAL = 0;
private volatile long dataInMemoryWithoutWAL = 0;
private volatile int percentFileLocal = 0;
private CacheStats cacheStats;
private ScheduledExecutorService executor;
private Runnable runnable;
public MetricsRegionServerWrapperImpl(final HRegionServer regionServer) {
this.regionServer = regionServer;
initBlockCache();
this.executor = CompatibilitySingletonFactory.getInstance(MetricsExecutor.class).getExecutor();
this.runnable = new RegionServerMetricsWrapperRunnable();
this.executor.scheduleWithFixedDelay(this.runnable, PERIOD, PERIOD, TimeUnit.SECONDS);
}
/**
* It's possible that due to threading the block cache could not be initialized
* yet (testing multiple region servers in one jvm). So we need to try and initialize
* the blockCache and cacheStats reference multiple times until we succeed.
*/
private synchronized void initBlockCache() {
CacheConfig cacheConfig = this.regionServer.cacheConfig;
if (cacheConfig != null && this.blockCache == null) {
this.blockCache = cacheConfig.getBlockCache();
}
if (this.blockCache != null && this.cacheStats == null) {
this.cacheStats = blockCache.getStats();
}
}
@Override
public String getClusterId() {
return regionServer.getClusterId();
}
@Override
public long getStartCode() {
return regionServer.getStartcode();
}
@Override
public String getZookeeperQuorum() {
ZooKeeperWatcher zk = regionServer.getZooKeeperWatcher();
if (zk == null) {
return "";
}
return zk.getQuorum();
}
@Override
public String getCoprocessors() {
String[] coprocessors = regionServer.getCoprocessors();
if (coprocessors == null || coprocessors.length == 0) {
return "";
}
return StringUtils.join(coprocessors, ", ");
}
@Override
public String getServerName() {
ServerName serverName = regionServer.getServerName();
if (serverName == null) {
return "";
}
return serverName.getServerName();
}
@Override
public long getNumOnlineRegions() {
Collection<HRegion> onlineRegionsLocalContext = regionServer.getOnlineRegionsLocalContext();
if (onlineRegionsLocalContext == null) {
return 0;
}
return onlineRegionsLocalContext.size();
}
@Override
public long getTotalRequestCount() {
return regionServer.requestCount.get();
}
@Override
public int getCompactionQueueSize() {
//The thread could be zero. if so assume there is no queue.
if (this.regionServer.compactSplitThread == null) {
return 0;
}
return this.regionServer.compactSplitThread.getCompactionQueueSize();
}
@Override
public int getFlushQueueSize() {
//If there is no flusher there should be no queue.
if (this.regionServer.cacheFlusher == null) {
return 0;
}
return this.regionServer.cacheFlusher.getFlushQueueSize();
}
@Override
public long getBlockCacheCount() {
if (this.blockCache == null) {
return 0;
}
return this.blockCache.size();
}
@Override
public long getBlockCacheSize() {
if (this.blockCache == null) {
return 0;
}
return this.blockCache.getCurrentSize();
}
@Override
public long getBlockCacheFreeSize() {
if (this.blockCache == null) {
return 0;
}
return this.blockCache.getFreeSize();
}
@Override
public long getBlockCacheHitCount() {
if (this.cacheStats == null) {
return 0;
}
return this.cacheStats.getHitCount();
}
@Override
public long getBlockCacheMissCount() {
if (this.cacheStats == null) {
return 0;
}
return this.cacheStats.getMissCount();
}
@Override
public long getBlockCacheEvictedCount() {
if (this.cacheStats == null) {
return 0;
}
return this.cacheStats.getEvictedCount();
}
@Override
public int getBlockCacheHitPercent() {
if (this.cacheStats == null) {
return 0;
}
return (int) (this.cacheStats.getHitRatio() * 100);
}
@Override
public int getBlockCacheHitCachingPercent() {
if (this.cacheStats == null) {
return 0;
}
return (int) (this.cacheStats.getHitCachingRatio() * 100);
}
@Override public void forceRecompute() {
this.runnable.run();
}
@Override
public long getNumStores() {
return numStores;
}
@Override
public long getNumStoreFiles() {
return numStoreFiles;
}
@Override
public long getMemstoreSize() {
return memstoreSize;
}
@Override
public long getStoreFileSize() {
return storeFileSize;
}
@Override public double getRequestsPerSecond() {
return requestsPerSecond;
}
@Override
public long getReadRequestsCount() {
return readRequestsCount;
}
@Override
public long getWriteRequestsCount() {
return writeRequestsCount;
}
@Override
public long getCheckAndMutateChecksFailed() {
return checkAndMutateChecksFailed;
}
@Override
public long getCheckAndMutateChecksPassed() {
return checkAndMutateChecksPassed;
}
@Override
public long getStoreFileIndexSize() {
return storefileIndexSize;
}
@Override
public long getTotalStaticIndexSize() {
return totalStaticIndexSize;
}
@Override
public long getTotalStaticBloomSize() {
return totalStaticBloomSize;
}
@Override
public long getNumMutationsWithoutWAL() {
return numMutationsWithoutWAL;
}
@Override
public long getDataInMemoryWithoutWAL() {
return dataInMemoryWithoutWAL;
}
@Override
public int getPercentFileLocal() {
return percentFileLocal;
}
@Override
public long getUpdatesBlockedTime() {
if (this.regionServer.cacheFlusher == null) {
return 0;
}
return this.regionServer.cacheFlusher.getUpdatesBlockedMsHighWater().get();
}
/**
* This is the runnable that will be executed on the executor every PERIOD number of seconds
* It will take metrics/numbers from all of the regions and use them to compute point in
* time metrics.
*/
public class RegionServerMetricsWrapperRunnable implements Runnable {
private long lastRan = 0;
private long lastRequestCount = 0;
@Override
synchronized public void run() {
initBlockCache();
cacheStats = blockCache.getStats();
HDFSBlocksDistribution hdfsBlocksDistribution =
new HDFSBlocksDistribution();
long tempNumStores = 0;
long tempNumStoreFiles = 0;
long tempMemstoreSize = 0;
long tempStoreFileSize = 0;
long tempReadRequestsCount = 0;
long tempWriteRequestsCount = 0;
long tempCheckAndMutateChecksFailed = 0;
long tempCheckAndMutateChecksPassed = 0;
long tempStorefileIndexSize = 0;
long tempTotalStaticIndexSize = 0;
long tempTotalStaticBloomSize = 0;
long tempNumMutationsWithoutWAL = 0;
long tempDataInMemoryWithoutWAL = 0;
int tempPercentFileLocal = 0;
for (HRegion r : regionServer.getOnlineRegionsLocalContext()) {
tempNumMutationsWithoutWAL += r.numMutationsWithoutWAL.get();
tempDataInMemoryWithoutWAL += r.dataInMemoryWithoutWAL.get();
tempReadRequestsCount += r.readRequestsCount.get();
tempWriteRequestsCount += r.writeRequestsCount.get();
tempCheckAndMutateChecksFailed += r.checkAndMutateChecksFailed.get();
tempCheckAndMutateChecksPassed += r.checkAndMutateChecksPassed.get();
tempNumStores += r.stores.size();
for (Store store : r.stores.values()) {
tempNumStoreFiles += store.getStorefilesCount();
tempMemstoreSize += store.getMemStoreSize();
tempStoreFileSize += store.getStorefilesSize();
tempStorefileIndexSize += store.getStorefilesIndexSize();
tempTotalStaticBloomSize += store.getTotalStaticBloomSize();
tempTotalStaticIndexSize += store.getTotalStaticIndexSize();
}
hdfsBlocksDistribution.add(r.getHDFSBlocksDistribution());
}
float localityIndex = hdfsBlocksDistribution.getBlockLocalityIndex(
regionServer.getServerName().getHostname());
tempPercentFileLocal = (int) (localityIndex * 100);
//Compute the number of requests per second
long currentTime = EnvironmentEdgeManager.currentTimeMillis();
// assume that it took PERIOD seconds to start the executor.
// this is a guess but it's a pretty good one.
if (lastRan == 0) {
lastRan = currentTime - (PERIOD*1000);
}
//If we've time traveled keep the last requests per second.
if ((currentTime - lastRan) > 10) {
long currentRequestCount = getTotalRequestCount();
requestsPerSecond = (currentRequestCount - lastRequestCount) / ((currentTime - lastRan) / 1000.0);
lastRequestCount = currentRequestCount;
}
lastRan = currentTime;
//Copy over computed values so that no thread sees half computed values.
numStores = tempNumStores;
numStoreFiles = tempNumStoreFiles;
memstoreSize = tempMemstoreSize;
storeFileSize = tempStoreFileSize;
readRequestsCount = tempReadRequestsCount;
writeRequestsCount = tempWriteRequestsCount;
checkAndMutateChecksFailed = tempCheckAndMutateChecksFailed;
checkAndMutateChecksPassed = tempCheckAndMutateChecksPassed;
storefileIndexSize = tempStorefileIndexSize;
totalStaticIndexSize = tempTotalStaticIndexSize;
totalStaticBloomSize = tempTotalStaticBloomSize;
numMutationsWithoutWAL = tempNumMutationsWithoutWAL;
dataInMemoryWithoutWAL = tempDataInMemoryWithoutWAL;
percentFileLocal = tempPercentFileLocal;
}
}
}