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HADOOP-16266. Add more fine-grained processing time metrics to the RPC layer. Contributed by Christopher Gregorian.

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This commit is contained in:
Christopher Gregorian 2019-04-29 15:37:25 -07:00 committed by Erik Krogen
parent e2b79912c3
commit f96a2df38d
19 changed files with 498 additions and 133 deletions
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5
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/CallQueueManager.java
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@ -193,9 +193,8 @@ boolean shouldBackOff(Schedulable e) {
return scheduler.shouldBackOff(e);
}
void addResponseTime(String name, int priorityLevel, int queueTime,
int processingTime) {
scheduler.addResponseTime(name, priorityLevel, queueTime, processingTime);
void addResponseTime(String name, Schedulable e, ProcessingDetails details) {
scheduler.addResponseTime(name, e, details);
}
// This should be only called once per call and cached in the call object

12
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/DecayRpcScheduler.java
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@ -55,6 +55,8 @@
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.apache.hadoop.ipc.ProcessingDetails.Timing;
/**
* The decay RPC scheduler counts incoming requests in a map, then
* decays the counts at a fixed time interval. The scheduler is optimized
@ -601,14 +603,18 @@ public boolean shouldBackOff(Schedulable obj) {
}
@Override
public void addResponseTime(String name, int priorityLevel, int queueTime,
int processingTime) {
public void addResponseTime(String callName, Schedulable schedulable,
ProcessingDetails details) {
int priorityLevel = schedulable.getPriorityLevel();
long queueTime = details.get(Timing.QUEUE, TimeUnit.MILLISECONDS);
long processingTime = details.get(Timing.PROCESSING, TimeUnit.MILLISECONDS);
responseTimeCountInCurrWindow.getAndIncrement(priorityLevel);
responseTimeTotalInCurrWindow.getAndAdd(priorityLevel,
queueTime+processingTime);
if (LOG.isDebugEnabled()) {
LOG.debug("addResponseTime for call: {} priority: {} queueTime: {} " +
"processingTime: {} ", name, priorityLevel, queueTime,
"processingTime: {} ", callName, priorityLevel, queueTime,
processingTime);
}
}

4
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/DefaultRpcScheduler.java
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@ -35,8 +35,8 @@ public boolean shouldBackOff(Schedulable obj) {
}
@Override
public void addResponseTime(String name, int priorityLevel, int queueTime,
int processingTime) {
public void addResponseTime(String callName, Schedulable schedulable,
ProcessingDetails details) {
}
public DefaultRpcScheduler(int priorityLevels, String namespace,

5
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/ExternalCall.java
View File

@ -37,6 +37,11 @@ public ExternalCall(PrivilegedExceptionAction<T> action) {
this.action = action;
}
@Override
public String getDetailedMetricsName() {
return "(external)";
}
public abstract UserGroupInformation getRemoteUser();
public final T get() throws InterruptedException, ExecutionException {

96
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/ProcessingDetails.java Normal file
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@ -0,0 +1,96 @@
/**
* 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.ipc;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.concurrent.TimeUnit;
/**
* Stores the times that a call takes to be processed through each step.
*/
@InterfaceStability.Unstable
@InterfaceAudience.Private
public class ProcessingDetails {
public static final Logger LOG =
LoggerFactory.getLogger(ProcessingDetails.class);
private final TimeUnit valueTimeUnit;
/**
* The different stages to track the time of.
*/
public enum Timing {
ENQUEUE, // time for reader to insert in call queue.
QUEUE, // time in the call queue.
HANDLER, // handler overhead not spent in processing/response.
PROCESSING, // time handler spent processing the call. always equal to
// lock_free + lock_wait + lock_shared + lock_exclusive
LOCKFREE, // processing with no lock.
LOCKWAIT, // processing while waiting for lock.
LOCKSHARED, // processing with a read lock.
LOCKEXCLUSIVE, // processing with a write lock.
RESPONSE; // time to encode and send response.
}
private long[] timings = new long[Timing.values().length];
ProcessingDetails(TimeUnit timeUnit) {
this.valueTimeUnit = timeUnit;
}
public long get(Timing type) {
// When using nanoTime to fetch timing information, it is possible to see
// time "move backward" slightly under unusual/rare circumstances. To avoid
// displaying a confusing number, round such timings to 0 here.
long ret = timings[type.ordinal()];
return ret < 0 ? 0 : ret;
}
public long get(Timing type, TimeUnit timeUnit) {
return timeUnit.convert(get(type), valueTimeUnit);
}
public void set(Timing type, long value) {
timings[type.ordinal()] = value;
}
public void set(Timing type, long value, TimeUnit timeUnit) {
set(type, valueTimeUnit.convert(value, timeUnit));
}
public void add(Timing type, long value, TimeUnit timeUnit) {
timings[type.ordinal()] += valueTimeUnit.convert(value, timeUnit);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder(256);
for (Timing type : Timing.values()) {
if (sb.length() > 0) {
sb.append(" ");
}
sb.append(type.name().toLowerCase())
.append("Time=").append(get(type));
}
return sb.toString();
}
}

31
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/ProtobufRpcEngine.java
View File

@ -521,46 +521,29 @@ public Writable call(RPC.Server server, String connectionProtocolName,
Message param = request.getValue(prototype);
Message result;
long startTime = Time.now();
int qTime = (int) (startTime - receiveTime);
Exception exception = null;
boolean isDeferred = false;
Call currentCall = Server.getCurCall().get();
try {
server.rpcDetailedMetrics.init(protocolImpl.protocolClass);
currentCallInfo.set(new CallInfo(server, methodName));
currentCall.setDetailedMetricsName(methodName);
result = service.callBlockingMethod(methodDescriptor, null, param);
// Check if this needs to be a deferred response,
// by checking the ThreadLocal callback being set
if (currentCallback.get() != null) {
Server.getCurCall().get().deferResponse();
isDeferred = true;
currentCall.deferResponse();
currentCallback.set(null);
return null;
}
} catch (ServiceException e) {
exception = (Exception) e.getCause();
Exception exception = (Exception) e.getCause();
currentCall.setDetailedMetricsName(
exception.getClass().getSimpleName());
throw (Exception) e.getCause();
} catch (Exception e) {
exception = e;
currentCall.setDetailedMetricsName(e.getClass().getSimpleName());
throw e;
} finally {
currentCallInfo.set(null);
int processingTime = (int) (Time.now() - startTime);
if (LOG.isDebugEnabled()) {
String msg =
"Served: " + methodName + (isDeferred ? ", deferred" : "") +
", queueTime= " + qTime +
" procesingTime= " + processingTime;
if (exception != null) {
msg += " exception= " + exception.getClass().getSimpleName();
}
LOG.debug(msg);
}
String detailedMetricsName = (exception == null) ?
methodName :
exception.getClass().getSimpleName();
server.updateMetrics(detailedMetricsName, qTime, processingTime,
isDeferred);
}
return RpcWritable.wrap(result);
}

41
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/RpcScheduler.java
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@ -18,6 +18,8 @@
package org.apache.hadoop.ipc;
import java.util.concurrent.TimeUnit;
/**
* Implement this interface to be used for RPC scheduling and backoff.
*
@ -30,8 +32,43 @@ public interface RpcScheduler {
boolean shouldBackOff(Schedulable obj);
void addResponseTime(String name, int priorityLevel, int queueTime,
int processingTime);
/**
* This method only exists to maintain backwards compatibility with old
* implementations. It will not be called by any Hadoop code, and should not
* be implemented by new implementations.
*
* @deprecated Use
* {@link #addResponseTime(String, Schedulable, ProcessingDetails)} instead.
*/
@Deprecated
@SuppressWarnings("unused")
default void addResponseTime(String name, int priorityLevel, int queueTime,
int processingTime) {
throw new UnsupportedOperationException(
"This method is deprecated: use the other addResponseTime");
}
/**
* Store a processing time value for an RPC call into this scheduler.
*
* @param callName The name of the call.
* @param schedulable The schedulable representing the incoming call.
* @param details The details of processing time.
*/
@SuppressWarnings("deprecation")
default void addResponseTime(String callName, Schedulable schedulable,
ProcessingDetails details) {
// For the sake of backwards compatibility with old implementations of
// this interface, a default implementation is supplied which uses the old
// method. All new implementations MUST override this interface and should
// NOT use the other addResponseTime method.
int queueTimeMs = (int)
details.get(ProcessingDetails.Timing.QUEUE, TimeUnit.MILLISECONDS);
int processingTimeMs = (int)
details.get(ProcessingDetails.Timing.PROCESSING, TimeUnit.MILLISECONDS);
addResponseTime(callName, schedulable.getPriorityLevel(),
queueTimeMs, processingTimeMs);
}
void stop();
}

149
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Server.java
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@ -18,6 +18,7 @@
package org.apache.hadoop.ipc;
import static org.apache.hadoop.ipc.ProcessingDetails.Timing;
import static org.apache.hadoop.ipc.RpcConstants.AUTHORIZATION_FAILED_CALL_ID;
import static org.apache.hadoop.ipc.RpcConstants.CONNECTION_CONTEXT_CALL_ID;
import static org.apache.hadoop.ipc.RpcConstants.CURRENT_VERSION;
@ -64,6 +65,7 @@
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
@ -514,7 +516,7 @@ protected void setLogSlowRPC(boolean logSlowRPCFlag) {
* if and only if it falls above 99.7% of requests. We start this logic
* only once we have enough sample size.
*/
void logSlowRpcCalls(String methodName, int processingTime) {
void logSlowRpcCalls(String methodName, Call call, long processingTime) {
final int deviation = 3;
// 1024 for minSampleSize just a guess -- not a number computed based on
@ -527,27 +529,47 @@ void logSlowRpcCalls(String methodName, int processingTime) {
if ((rpcMetrics.getProcessingSampleCount() > minSampleSize) &&
(processingTime > threeSigma)) {
if(LOG.isWarnEnabled()) {
String client = CurCall.get().toString();
LOG.warn(
"Slow RPC : " + methodName + " took " + processingTime +
" milliseconds to process from client " + client);
}
LOG.warn("Slow RPC : {} took {} {} to process from client {}",
methodName, processingTime, RpcMetrics.TIMEUNIT, call);
rpcMetrics.incrSlowRpc();
}
}
void updateMetrics(String name, int queueTime, int processingTime,
boolean deferredCall) {
void updateMetrics(Call call, long startTime, boolean connDropped) {
// delta = handler + processing + response
long deltaNanos = Time.monotonicNowNanos() - startTime;
long timestampNanos = call.timestampNanos;
ProcessingDetails details = call.getProcessingDetails();
// queue time is the delta between when the call first arrived and when it
// began being serviced, minus the time it took to be put into the queue
details.set(Timing.QUEUE,
startTime - timestampNanos - details.get(Timing.ENQUEUE));
deltaNanos -= details.get(Timing.PROCESSING);
deltaNanos -= details.get(Timing.RESPONSE);
details.set(Timing.HANDLER, deltaNanos);
long queueTime = details.get(Timing.QUEUE, RpcMetrics.TIMEUNIT);
rpcMetrics.addRpcQueueTime(queueTime);
if (!deferredCall) {
rpcMetrics.addRpcProcessingTime(processingTime);
rpcDetailedMetrics.addProcessingTime(name, processingTime);
callQueue.addResponseTime(name, getPriorityLevel(), queueTime,
processingTime);
if (isLogSlowRPC()) {
logSlowRpcCalls(name, processingTime);
if (call.isResponseDeferred() || connDropped) {
// call was skipped; don't include it in processing metrics
return;
}
long processingTime =
details.get(Timing.PROCESSING, RpcMetrics.TIMEUNIT);
long waitTime =
details.get(Timing.LOCKWAIT, RpcMetrics.TIMEUNIT);
rpcMetrics.addRpcLockWaitTime(waitTime);
rpcMetrics.addRpcProcessingTime(processingTime);
// don't include lock wait for detailed metrics.
processingTime -= waitTime;
String name = call.getDetailedMetricsName();
rpcDetailedMetrics.addProcessingTime(name, processingTime);
callQueue.addResponseTime(name, call, details);
if (isLogSlowRPC()) {
logSlowRpcCalls(name, call, processingTime);
}
}
@ -716,9 +738,13 @@ static boolean getClientBackoffEnable(
/** A generic call queued for handling. */
public static class Call implements Schedulable,
PrivilegedExceptionAction<Void> {
private final ProcessingDetails processingDetails =
new ProcessingDetails(TimeUnit.NANOSECONDS);
// the method name to use in metrics
private volatile String detailedMetricsName = "";
final int callId; // the client's call id
final int retryCount; // the retry count of the call
long timestamp; // time received when response is null
long timestampNanos; // time received when response is null
// time served when response is not null
private AtomicInteger responseWaitCount = new AtomicInteger(1);
final RPC.RpcKind rpcKind;
@ -755,7 +781,7 @@ public Call(int id, int retryCount, Void ignore1, Void ignore2,
TraceScope traceScope, CallerContext callerContext) {
this.callId = id;
this.retryCount = retryCount;
this.timestamp = Time.now();
this.timestampNanos = Time.monotonicNowNanos();
this.rpcKind = kind;
this.clientId = clientId;
this.traceScope = traceScope;
@ -764,6 +790,28 @@ public Call(int id, int retryCount, Void ignore1, Void ignore2,
this.isCallCoordinated = false;
}
/**
* Indicates whether the call has been processed. Always true unless
* overridden.
*
* @return true
*/
boolean isOpen() {
return true;
}
String getDetailedMetricsName() {
return detailedMetricsName;
}
void setDetailedMetricsName(String name) {
detailedMetricsName = name;
}
public ProcessingDetails getProcessingDetails() {
return processingDetails;
}
@Override
public String toString() {
return "Call#" + callId + " Retry#" + retryCount;
@ -911,6 +959,11 @@ private class RpcCall extends Call {
this.rpcRequest = param;
}
@Override
boolean isOpen() {
return connection.channel.isOpen();
}
void setResponseFields(Writable returnValue,
ResponseParams responseParams) {
this.rv = returnValue;
@ -938,18 +991,33 @@ public Void run() throws Exception {
Server.LOG.info(Thread.currentThread().getName() + ": skipped " + this);
return null;
}
long startNanos = Time.monotonicNowNanos();
Writable value = null;
ResponseParams responseParams = new ResponseParams();
try {
value = call(
rpcKind, connection.protocolName, rpcRequest, timestamp);
rpcKind, connection.protocolName, rpcRequest, timestampNanos);
} catch (Throwable e) {
populateResponseParamsOnError(e, responseParams);
}
if (!isResponseDeferred()) {
long deltaNanos = Time.monotonicNowNanos() - startNanos;
ProcessingDetails details = getProcessingDetails();
details.set(Timing.PROCESSING, deltaNanos, TimeUnit.NANOSECONDS);
deltaNanos -= details.get(Timing.LOCKWAIT, TimeUnit.NANOSECONDS);
deltaNanos -= details.get(Timing.LOCKSHARED, TimeUnit.NANOSECONDS);
deltaNanos -= details.get(Timing.LOCKEXCLUSIVE, TimeUnit.NANOSECONDS);
details.set(Timing.LOCKFREE, deltaNanos, TimeUnit.NANOSECONDS);
startNanos = Time.monotonicNowNanos();
setResponseFields(value, responseParams);
sendResponse();
deltaNanos = Time.monotonicNowNanos() - startNanos;
details.set(Timing.RESPONSE, deltaNanos, TimeUnit.NANOSECONDS);
} else {
if (LOG.isDebugEnabled()) {
LOG.debug("Deferring response for callId: " + this.callId);
@ -1377,13 +1445,14 @@ Reader getReader() {
}
}
private final static long PURGE_INTERVAL_NANOS = TimeUnit.NANOSECONDS.convert(
15, TimeUnit.MINUTES);
// Sends responses of RPC back to clients.
private class Responder extends Thread {
private final Selector writeSelector;
private int pending; // connections waiting to register
final static int PURGE_INTERVAL = 900000; // 15mins
Responder() throws IOException {
this.setName("IPC Server Responder");
this.setDaemon(true);
@ -1408,12 +1477,12 @@ public void run() {
}
private void doRunLoop() {
long lastPurgeTime = 0; // last check for old calls.
long lastPurgeTimeNanos = 0; // last check for old calls.
while (running) {
try {
waitPending(); // If a channel is being registered, wait.
writeSelector.select(PURGE_INTERVAL);
writeSelector.select(PURGE_INTERVAL_NANOS);
Iterator<SelectionKey> iter = writeSelector.selectedKeys().iterator();
while (iter.hasNext()) {
SelectionKey key = iter.next();
@ -1435,11 +1504,11 @@ private void doRunLoop() {
LOG.info(Thread.currentThread().getName() + ": doAsyncWrite threw exception " + e);
}
}
long now = Time.now();
if (now < lastPurgeTime + PURGE_INTERVAL) {
long nowNanos = Time.monotonicNowNanos();
if (nowNanos < lastPurgeTimeNanos + PURGE_INTERVAL_NANOS) {
continue;
}
lastPurgeTime = now;
lastPurgeTimeNanos = nowNanos;
//
// If there were some calls that have not been sent out for a
// long time, discard them.
@ -1463,7 +1532,7 @@ private void doRunLoop() {
}
for (RpcCall call : calls) {
doPurge(call, now);
doPurge(call, nowNanos);
}
} catch (OutOfMemoryError e) {
//
@ -1514,7 +1583,7 @@ private void doPurge(RpcCall call, long now) {
Iterator<RpcCall> iter = responseQueue.listIterator(0);
while (iter.hasNext()) {
call = iter.next();
if (now > call.timestamp + PURGE_INTERVAL) {
if (now > call.timestampNanos + PURGE_INTERVAL_NANOS) {
closeConnection(call.connection);
break;
}
@ -1578,7 +1647,7 @@ private boolean processResponse(LinkedList<RpcCall> responseQueue,
if (inHandler) {
// set the serve time when the response has to be sent later
call.timestamp = Time.now();
call.timestampNanos = Time.monotonicNowNanos();
incPending();
try {
@ -2770,6 +2839,9 @@ private void internalQueueCall(Call call, boolean blocking)
} else {
callQueue.add(call);
}
long deltaNanos = Time.monotonicNowNanos() - call.timestampNanos;
call.getProcessingDetails().set(Timing.ENQUEUE, deltaNanos,
TimeUnit.NANOSECONDS);
} catch (CallQueueOverflowException cqe) {
// If rpc scheduler indicates back off based on performance degradation
// such as response time or rpc queue is full, we will ask the client
@ -2797,8 +2869,16 @@ public void run() {
SERVER.set(Server.this);
while (running) {
TraceScope traceScope = null;
Call call = null;
long startTimeNanos = 0;
// True iff the connection for this call has been dropped.
// Set to true by default and update to false later if the connection
// can be succesfully read.
boolean connDropped = true;
try {
final Call call = callQueue.take(); // pop the queue; maybe blocked here
call = callQueue.take(); // pop the queue; maybe blocked here
startTimeNanos = Time.monotonicNowNanos();
if (alignmentContext != null && call.isCallCoordinated() &&
call.getClientStateId() > alignmentContext.getLastSeenStateId()) {
/*
@ -2829,6 +2909,7 @@ public void run() {
// always update the current call context
CallerContext.setCurrent(call.callerContext);
UserGroupInformation remoteUser = call.getRemoteUser();
connDropped = !call.isOpen();
if (remoteUser != null) {
remoteUser.doAs(call);
} else {
@ -2851,6 +2932,14 @@ public void run() {
} finally {
CurCall.set(null);
IOUtils.cleanupWithLogger(LOG, traceScope);
if (call != null) {
updateMetrics(call, startTimeNanos, connDropped);
ProcessingDetails.LOG.debug(
"Served: [{}]{} name={} user={} details={}",
call, (call.isResponseDeferred() ? ", deferred" : ""),
call.getDetailedMetricsName(), call.getRemoteUser(),
call.getProcessingDetails());
}
}
}
LOG.debug(Thread.currentThread().getName() + ": exiting");

18
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/WritableRpcEngine.java
View File

@ -537,15 +537,15 @@ public Writable call(org.apache.hadoop.ipc.RPC.Server server,
}
// Invoke the protocol method
long startTime = Time.now();
int qTime = (int) (startTime-receivedTime);
Exception exception = null;
Call currentCall = Server.getCurCall().get();
try {
Method method =
protocolImpl.protocolClass.getMethod(call.getMethodName(),
call.getParameterClasses());
method.setAccessible(true);
server.rpcDetailedMetrics.init(protocolImpl.protocolClass);
currentCall.setDetailedMetricsName(call.getMethodName());
Object value =
method.invoke(protocolImpl.protocolImpl, call.getParameters());
if (server.verbose) log("Return: "+value);
@ -571,20 +571,10 @@ public Writable call(org.apache.hadoop.ipc.RPC.Server server,
exception = ioe;
throw ioe;
} finally {
int processingTime = (int) (Time.now() - startTime);
if (LOG.isDebugEnabled()) {
String msg = "Served: " + call.getMethodName() +
" queueTime= " + qTime + " procesingTime= " + processingTime;
if (exception != null) {
msg += " exception= " + exception.getClass().getSimpleName();
currentCall.setDetailedMetricsName(
exception.getClass().getSimpleName());
}
LOG.debug(msg);
}
String detailedMetricsName = (exception == null) ?
call.getMethodName() :
exception.getClass().getSimpleName();
server
.updateMetrics(detailedMetricsName, qTime, processingTime, false);
}
}
}

6
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/metrics/RpcDetailedMetrics.java
View File

@ -66,12 +66,12 @@ public void init(Class<?> protocol) {
/**
* Add an RPC processing time sample
* @param name of the RPC call
* @param rpcCallName of the RPC call
* @param processingTime the processing time
*/
//@Override // some instrumentation interface
public void addProcessingTime(String name, int processingTime) {
rates.add(name, processingTime);
public void addProcessingTime(String rpcCallName, long processingTime) {
rates.add(rpcCallName, processingTime);
}
public void addDeferredProcessingTime(String name, long processingTime) {

61
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/metrics/RpcMetrics.java
View File

@ -17,6 +17,8 @@
*/
package org.apache.hadoop.ipc.metrics;
import java.util.concurrent.TimeUnit;
import com.google.common.annotations.VisibleForTesting;
import org.apache.hadoop.fs.CommonConfigurationKeys;
import org.apache.hadoop.ipc.Server;
@ -27,7 +29,6 @@
import org.apache.hadoop.metrics2.annotation.Metrics;
import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
import org.apache.hadoop.metrics2.lib.MetricsRegistry;
import org.apache.hadoop.metrics2.lib.MutableCounterInt;
import org.apache.hadoop.metrics2.lib.MutableCounterLong;
import org.apache.hadoop.metrics2.lib.MutableQuantiles;
import org.apache.hadoop.metrics2.lib.MutableRate;
@ -47,6 +48,8 @@ public class RpcMetrics {
final MetricsRegistry registry;
final String name;
final boolean rpcQuantileEnable;
/** The time unit used when storing/accessing time durations. */
public final static TimeUnit TIMEUNIT = TimeUnit.MILLISECONDS;
RpcMetrics(Server server, Configuration conf) {
String port = String.valueOf(server.getListenerAddress().getPort());
@ -61,23 +64,30 @@ public class RpcMetrics {
CommonConfigurationKeys.RPC_METRICS_QUANTILE_ENABLE,
CommonConfigurationKeys.RPC_METRICS_QUANTILE_ENABLE_DEFAULT);
if (rpcQuantileEnable) {
rpcQueueTimeMillisQuantiles =
rpcQueueTimeQuantiles =
new MutableQuantiles[intervals.length];
rpcProcessingTimeMillisQuantiles =
rpcLockWaitTimeQuantiles =
new MutableQuantiles[intervals.length];
deferredRpcProcessingTimeMillisQuantiles =
rpcProcessingTimeQuantiles =
new MutableQuantiles[intervals.length];
deferredRpcProcessingTimeQuantiles =
new MutableQuantiles[intervals.length];
for (int i = 0; i < intervals.length; i++) {
int interval = intervals[i];
rpcQueueTimeMillisQuantiles[i] = registry.newQuantiles("rpcQueueTime"
+ interval + "s", "rpc queue time in milli second", "ops",
rpcQueueTimeQuantiles[i] = registry.newQuantiles("rpcQueueTime"
+ interval + "s", "rpc queue time in " + TIMEUNIT, "ops",
"latency", interval);
rpcProcessingTimeMillisQuantiles[i] = registry.newQuantiles(
rpcLockWaitTimeQuantiles[i] = registry.newQuantiles(
"rpcLockWaitTime" + interval + "s",
"rpc lock wait time in " + TIMEUNIT, "ops",
"latency", interval);
rpcProcessingTimeQuantiles[i] = registry.newQuantiles(
"rpcProcessingTime" + interval + "s",
"rpc processing time in milli second", "ops", "latency", interval);
deferredRpcProcessingTimeMillisQuantiles[i] = registry
.newQuantiles("deferredRpcProcessingTime" + interval + "s",
"deferred rpc processing time in milli seconds", "ops",
"rpc processing time in " + TIMEUNIT, "ops",
"latency", interval);
deferredRpcProcessingTimeQuantiles[i] = registry.newQuantiles(
"deferredRpcProcessingTime" + interval + "s",
"deferred rpc processing time in " + TIMEUNIT, "ops",
"latency", interval);
}
}
@ -94,11 +104,13 @@ public static RpcMetrics create(Server server, Configuration conf) {
@Metric("Number of received bytes") MutableCounterLong receivedBytes;
@Metric("Number of sent bytes") MutableCounterLong sentBytes;
@Metric("Queue time") MutableRate rpcQueueTime;
MutableQuantiles[] rpcQueueTimeMillisQuantiles;
MutableQuantiles[] rpcQueueTimeQuantiles;
@Metric("Lock wait time") MutableRate rpcLockWaitTime;
MutableQuantiles[] rpcLockWaitTimeQuantiles;
@Metric("Processing time") MutableRate rpcProcessingTime;
MutableQuantiles[] rpcProcessingTimeMillisQuantiles;
MutableQuantiles[] rpcProcessingTimeQuantiles;
@Metric("Deferred Processing time") MutableRate deferredRpcProcessingTime;
MutableQuantiles[] deferredRpcProcessingTimeMillisQuantiles;
MutableQuantiles[] deferredRpcProcessingTimeQuantiles;
@Metric("Number of authentication failures")
MutableCounterLong rpcAuthenticationFailures;
@Metric("Number of authentication successes")
@ -194,25 +206,32 @@ public void incrReceivedBytes(int count) {
* Add an RPC queue time sample
* @param qTime the queue time
*/
//@Override
public void addRpcQueueTime(int qTime) {
public void addRpcQueueTime(long qTime) {
rpcQueueTime.add(qTime);
if (rpcQuantileEnable) {
for (MutableQuantiles q : rpcQueueTimeMillisQuantiles) {
for (MutableQuantiles q : rpcQueueTimeQuantiles) {
q.add(qTime);
}
}
}
public void addRpcLockWaitTime(long waitTime) {
rpcLockWaitTime.add(waitTime);
if (rpcQuantileEnable) {
for (MutableQuantiles q : rpcLockWaitTimeQuantiles) {
q.add(waitTime);
}
}
}
/**
* Add an RPC processing time sample
* @param processingTime the processing time
*/
//@Override
public void addRpcProcessingTime(int processingTime) {
public void addRpcProcessingTime(long processingTime) {
rpcProcessingTime.add(processingTime);
if (rpcQuantileEnable) {
for (MutableQuantiles q : rpcProcessingTimeMillisQuantiles) {
for (MutableQuantiles q : rpcProcessingTimeQuantiles) {
q.add(processingTime);
}
}
@ -221,7 +240,7 @@ public void addRpcProcessingTime(int processingTime) {
public void addDeferredRpcProcessingTime(long processingTime) {
deferredRpcProcessingTime.add(processingTime);
if (rpcQuantileEnable) {
for (MutableQuantiles q : deferredRpcProcessingTimeMillisQuantiles) {
for (MutableQuantiles q : deferredRpcProcessingTimeQuantiles) {
q.add(processingTime);
}
}

9
hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md
View File

@ -71,6 +71,8 @@ Each metrics record contains tags such as Hostname and port (number to which ser
| `SentBytes` | Total number of sent bytes |
| `RpcQueueTimeNumOps` | Total number of RPC calls |
| `RpcQueueTimeAvgTime` | Average queue time in milliseconds |
| `RpcLockWaitTimeNumOps` | Total number of RPC call (same as RpcQueueTimeNumOps) |
| `RpcLockWaitTimeAvgTime` | Average time waiting for lock acquisition in milliseconds |
| `RpcProcessingTimeNumOps` | Total number of RPC calls (same to RpcQueueTimeNumOps) |
| `RpcProcessingAvgTime` | Average Processing time in milliseconds |
| `RpcAuthenticationFailures` | Total number of authentication failures |
@ -92,6 +94,12 @@ Each metrics record contains tags such as Hostname and port (number to which ser
| `rpcProcessingTime`*num*`s90thPercentileLatency` | Shows the 90th percentile of RPC processing time in milliseconds (*num* seconds granularity) if `rpc.metrics.quantile.enable` is set to true. *num* is specified by `rpc.metrics.percentiles.intervals`. |
| `rpcProcessingTime`*num*`s95thPercentileLatency` | Shows the 95th percentile of RPC processing time in milliseconds (*num* seconds granularity) if `rpc.metrics.quantile.enable` is set to true. *num* is specified by `rpc.metrics.percentiles.intervals`. |
| `rpcProcessingTime`*num*`s99thPercentileLatency` | Shows the 99th percentile of RPC processing time in milliseconds (*num* seconds granularity) if `rpc.metrics.quantile.enable` is set to true. *num* is specified by `rpc.metrics.percentiles.intervals`. |
| `rpcLockWaitTime`*num*`sNumOps` | Shows total number of RPC calls (*num* seconds granularity) if `rpc.metrics.quantile.enable` is set to true. *num* is specified by `rpc.metrics.percentiles.intervals`. |
| `rpcLockWaitTime`*num*`s50thPercentileLatency` | Shows the 50th percentile of RPC lock wait time in milliseconds (*num* seconds granularity) if `rpc.metrics.quantile.enable` is set to true. *num* is specified by `rpc.metrics.percentiles.intervals`. |
| `rpcLockWaitTime`*num*`s75thPercentileLatency` | Shows the 75th percentile of RPC lock wait time in milliseconds (*num* seconds granularity) if `rpc.metrics.quantile.enable` is set to true. *num* is specified by `rpc.metrics.percentiles.intervals`. |
| `rpcLockWaitTime`*num*`s90thPercentileLatency` | Shows the 90th percentile of RPC lock wait time in milliseconds (*num* seconds granularity) if `rpc.metrics.quantile.enable` is set to true. *num* is specified by `rpc.metrics.percentiles.intervals`. |
| `rpcLockWaitTime`*num*`s95thPercentileLatency` | Shows the 95th percentile of RPC lock wait time in milliseconds (*num* seconds granularity) if `rpc.metrics.quantile.enable` is set to true. *num* is specified by `rpc.metrics.percentiles.intervals`. |
| `rpcLockWaitTime`*num*`s99thPercentileLatency` | Shows the 99th percentile of RPC lock wait time in milliseconds (*num* seconds granularity) if `rpc.metrics.quantile.enable` is set to true. *num* is specified by `rpc.metrics.percentiles.intervals`. |
RetryCache/NameNodeRetryCache
-----------------------------
@ -118,6 +126,7 @@ rpcdetailed context
===================
Metrics of rpcdetailed context are exposed in unified manner by RPC layer. Two metrics are exposed for each RPC based on its name. Metrics named "(RPC method name)NumOps" indicates total number of method calls, and metrics named "(RPC method name)AvgTime" shows average turn around time for method calls in milliseconds.
Please note that the AvgTime metrics do not include time spent waiting to acquire locks on data structures (see RpcLockWaitTimeAvgTime).
rpcdetailed
-----------

61
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ipc/TestProcessingDetails.java Normal file
View File

@ -0,0 +1,61 @@
/**
* 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.ipc;
import org.junit.Test;
import java.util.concurrent.TimeUnit;
import static org.apache.hadoop.ipc.ProcessingDetails.Timing;
import static org.junit.Assert.assertEquals;
/**
* Unit tests for ProcessingDetails time unit conversion and output.
*/
public class TestProcessingDetails {
/**
* Test that the conversion of time values in various units in and out of the
* details are done properly.
*/
@Test
public void testTimeConversion() {
ProcessingDetails details = new ProcessingDetails(TimeUnit.MICROSECONDS);
details.set(Timing.ENQUEUE, 10);
assertEquals(10, details.get(Timing.ENQUEUE));
assertEquals(10_000, details.get(Timing.ENQUEUE, TimeUnit.NANOSECONDS));
details.set(Timing.QUEUE, 20, TimeUnit.MILLISECONDS);
details.add(Timing.QUEUE, 20, TimeUnit.MICROSECONDS);
assertEquals(20_020, details.get(Timing.QUEUE));
assertEquals(0, details.get(Timing.QUEUE, TimeUnit.SECONDS));
}
@Test
public void testToString() {
ProcessingDetails details = new ProcessingDetails(TimeUnit.MICROSECONDS);
details.set(Timing.ENQUEUE, 10);
details.set(Timing.QUEUE, 20, TimeUnit.MILLISECONDS);
assertEquals("enqueueTime=10 queueTime=20000 handlerTime=0 " +
"processingTime=0 lockfreeTime=0 lockwaitTime=0 locksharedTime=0 " +
"lockexclusiveTime=0 responseTime=0", details.toString());
}
}

9
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ipc/TestProtoBufRpc.java
View File

@ -34,6 +34,7 @@
import org.apache.hadoop.ipc.protobuf.TestRpcServiceProtos.TestProtobufRpcProto;
import org.apache.hadoop.metrics2.MetricsRecordBuilder;
import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.test.GenericTestUtils;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
@ -41,6 +42,7 @@
import java.io.IOException;
import java.net.URISyntaxException;
import java.util.concurrent.TimeoutException;
import static org.apache.hadoop.test.MetricsAsserts.assertCounterGt;
import static org.apache.hadoop.test.MetricsAsserts.getMetrics;
@ -215,7 +217,8 @@ public void testExtraLongRpc() throws Exception {
}
@Test(timeout = 12000)
public void testLogSlowRPC() throws IOException, ServiceException {
public void testLogSlowRPC() throws IOException, ServiceException,
TimeoutException, InterruptedException {
TestRpcService2 client = getClient2();
// make 10 K fast calls
for (int x = 0; x < 10000; x++) {
@ -234,9 +237,9 @@ public void testLogSlowRPC() throws IOException, ServiceException {
// make a really slow call. Sleep sleeps for 1000ms
client.sleep(null, newSleepRequest(SLEEP_DURATION * 3));
long after = rpcMetrics.getRpcSlowCalls();
// Ensure slow call is logged.
Assert.assertEquals(before + 1L, after);
GenericTestUtils.waitFor(()
-> rpcMetrics.getRpcSlowCalls() == before + 1L, 10, 1000);
}
@Test(timeout = 12000)

18
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ipc/TestRPC.java
View File

@ -87,6 +87,8 @@
import static org.apache.hadoop.test.MetricsAsserts.assertCounter;
import static org.apache.hadoop.test.MetricsAsserts.assertCounterGt;
import static org.apache.hadoop.test.MetricsAsserts.assertGauge;
import static org.apache.hadoop.test.MetricsAsserts.getDoubleGauge;
import static org.apache.hadoop.test.MetricsAsserts.getLongCounter;
import static org.apache.hadoop.test.MetricsAsserts.getMetrics;
import static org.junit.Assert.assertEquals;
@ -1072,10 +1074,14 @@ public TestRpcService run() {
}
MetricsRecordBuilder rpcMetrics =
getMetrics(server.getRpcMetrics().name());
assertTrue("Expected non-zero rpc queue time",
getLongCounter("RpcQueueTimeNumOps", rpcMetrics) > 0);
assertTrue("Expected non-zero rpc processing time",
getLongCounter("RpcProcessingTimeNumOps", rpcMetrics) > 0);
assertEquals("Expected correct rpc queue count",
3000, getLongCounter("RpcQueueTimeNumOps", rpcMetrics));
assertEquals("Expected correct rpc processing count",
3000, getLongCounter("RpcProcessingTimeNumOps", rpcMetrics));
assertEquals("Expected correct rpc lock wait count",
3000, getLongCounter("RpcLockWaitTimeNumOps", rpcMetrics));
assertEquals("Expected zero rpc lock wait time",
0, getDoubleGauge("RpcLockWaitTimeAvgTime", rpcMetrics), 0.001);
MetricsAsserts.assertQuantileGauges("RpcQueueTime" + interval + "s",
rpcMetrics);
MetricsAsserts.assertQuantileGauges("RpcProcessingTime" + interval + "s",
@ -1086,6 +1092,10 @@ public TestRpcService run() {
UserGroupInformation.getCurrentUser().getShortUserName();
assertTrue(actualUserVsCon.contains("\"" + proxyUser + "\":1"));
assertTrue(actualUserVsCon.contains("\"" + testUser + "\":1"));
proxy.lockAndSleep(null, newSleepRequest(5));
rpcMetrics = getMetrics(server.getRpcMetrics().name());
assertGauge("RpcLockWaitTimeAvgTime", 10000.0, rpcMetrics);
} finally {
if (proxy2 != null) {
RPC.stopProxy(proxy2);

28
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ipc/TestRpcBase.java
View File

@ -21,12 +21,16 @@
import com.google.protobuf.BlockingService;
import com.google.protobuf.RpcController;
import com.google.protobuf.ServiceException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.ipc.protobuf.TestProtos;
import org.apache.hadoop.ipc.protobuf.TestRpcServiceProtos;
import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.token.SecretManager;
import org.apache.hadoop.util.Time;
import org.junit.Assert;
import org.apache.hadoop.io.Text;
@ -278,6 +282,7 @@ public interface TestRpcService
public static class PBServerImpl implements TestRpcService {
CountDownLatch fastPingCounter = new CountDownLatch(2);
private List<Server.Call> postponedCalls = new ArrayList<>();
private final Lock lock = new ReentrantLock();
@Override
public TestProtos.EmptyResponseProto ping(RpcController unused,
@ -388,6 +393,29 @@ public TestProtos.EmptyResponseProto sleep(
return TestProtos.EmptyResponseProto.newBuilder().build();
}
@Override
public TestProtos.EmptyResponseProto lockAndSleep(
RpcController controller, TestProtos.SleepRequestProto request)
throws ServiceException {
ProcessingDetails details =
Server.getCurCall().get().getProcessingDetails();
lock.lock();
long startNanos = Time.monotonicNowNanos();
try {
Thread.sleep(request.getMilliSeconds());
} catch (InterruptedException ignore) {
// ignore
} finally {
lock.unlock();
}
// Add some arbitrary large lock wait time since in any test scenario
// the lock wait time will probably actually be too small to notice
details.add(ProcessingDetails.Timing.LOCKWAIT, 10, TimeUnit.SECONDS);
details.add(ProcessingDetails.Timing.LOCKEXCLUSIVE,
Time.monotonicNowNanos() - startNanos, TimeUnit.NANOSECONDS);
return TestProtos.EmptyResponseProto.newBuilder().build();
}
@Override
public TestProtos.AuthMethodResponseProto getAuthMethod(
RpcController controller, TestProtos.EmptyRequestProto request)

1
hadoop-common-project/hadoop-common/src/test/proto/test_rpc_service.proto
View File

@ -39,6 +39,7 @@ service TestProtobufRpcProto {
rpc testServerGet(EmptyRequestProto) returns (EmptyResponseProto);
rpc exchange(ExchangeRequestProto) returns (ExchangeResponseProto);
rpc sleep(SleepRequestProto) returns (EmptyResponseProto);
rpc lockAndSleep(SleepRequestProto) returns (EmptyResponseProto);
rpc getAuthMethod(EmptyRequestProto) returns (AuthMethodResponseProto);
rpc getAuthUser(EmptyRequestProto) returns (UserResponseProto);
rpc echoPostponed(EchoRequestProto) returns (EchoResponseProto);

66
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystemLock.java
View File

@ -28,6 +28,7 @@
import com.google.common.annotations.VisibleForTesting;
import org.apache.commons.math3.stat.descriptive.SummaryStatistics;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.ipc.Server;
import org.apache.hadoop.log.LogThrottlingHelper;
import org.apache.hadoop.metrics2.lib.MutableRatesWithAggregation;
import org.apache.hadoop.util.StringUtils;
@ -43,6 +44,7 @@
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_READ_LOCK_REPORTING_THRESHOLD_MS_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_WRITE_LOCK_REPORTING_THRESHOLD_MS_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_WRITE_LOCK_REPORTING_THRESHOLD_MS_KEY;
import static org.apache.hadoop.ipc.ProcessingDetails.Timing;
import static org.apache.hadoop.log.LogThrottlingHelper.LogAction;
/**
@ -154,17 +156,11 @@ public Long initialValue() {
}
public void readLock() {
coarseLock.readLock().lock();
if (coarseLock.getReadHoldCount() == 1) {
readLockHeldTimeStampNanos.set(timer.monotonicNowNanos());
}
doLock(false);
}
public void readLockInterruptibly() throws InterruptedException {
coarseLock.readLock().lockInterruptibly();
if (coarseLock.getReadHoldCount() == 1) {
readLockHeldTimeStampNanos.set(timer.monotonicNowNanos());
}
doLockInterruptibly(false);
}
public void readUnlock() {
@ -217,17 +213,11 @@ public void readUnlock(String opName) {
}
public void writeLock() {
coarseLock.writeLock().lock();
if (coarseLock.getWriteHoldCount() == 1) {
writeLockHeldTimeStampNanos = timer.monotonicNowNanos();
}
doLock(true);
}
public void writeLockInterruptibly() throws InterruptedException {
coarseLock.writeLock().lockInterruptibly();
if (coarseLock.getWriteHoldCount() == 1) {
writeLockHeldTimeStampNanos = timer.monotonicNowNanos();
}
doLockInterruptibly(true);
}
/**
@ -337,6 +327,50 @@ private void addMetric(String operationName, long value, boolean isWrite) {
String overallMetric = getMetricName(OVERALL_METRIC_NAME, isWrite);
detailedHoldTimeMetrics.add(overallMetric, value);
}
updateProcessingDetails(
isWrite ? Timing.LOCKEXCLUSIVE : Timing.LOCKSHARED, value);
}
private void doLock(boolean isWrite) {
long startNanos = timer.monotonicNowNanos();
if (isWrite) {
coarseLock.writeLock().lock();
} else {
coarseLock.readLock().lock();
}
updateLockWait(startNanos, isWrite);
}
private void doLockInterruptibly(boolean isWrite)
throws InterruptedException {
long startNanos = timer.monotonicNowNanos();
if (isWrite) {
coarseLock.writeLock().lockInterruptibly();
} else {
coarseLock.readLock().lockInterruptibly();
}
updateLockWait(startNanos, isWrite);
}
private void updateLockWait(long startNanos, boolean isWrite) {
long now = timer.monotonicNowNanos();
updateProcessingDetails(Timing.LOCKWAIT, now - startNanos);
if (isWrite) {
if (coarseLock.getWriteHoldCount() == 1) {
writeLockHeldTimeStampNanos = now;
}
} else {
if (coarseLock.getReadHoldCount() == 1) {
readLockHeldTimeStampNanos.set(now);
}
}
}
private static void updateProcessingDetails(Timing type, long deltaNanos) {
Server.Call call = Server.getCurCall().get();
if (call != null) {
call.getProcessingDetails().add(type, deltaNanos, TimeUnit.NANOSECONDS);
}
}
private static String getMetricName(String operationName, boolean isWrite) {

5
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestConsistentReadsObserver.java
View File

@ -373,11 +373,6 @@ public boolean shouldBackOff(Schedulable obj) {
return --allowed < 0;
}
@Override
public void addResponseTime(String name, int priorityLevel, int queueTime,
int processingTime) {
}
@Override
public void stop() {
}