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MAPREDUCE-2925. Fixed Yarn+MR client code to behave saner with completed jobs. Contributed by Devaraj K. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1172587 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Vinod Kumar Vavilapalli 2011-09-19 12:26:14 +00:00
parent e34d2c075d
commit 29552eeb36
4 changed files with 203 additions and 9 deletions
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3
hadoop-mapreduce-project/CHANGES.txt
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@ -1345,6 +1345,9 @@ Release 0.23.0 - Unreleased
MAPREDUCE-3006. Fixed MapReduce AM to exit only after properly writing out
history file. (vinodkv)
MAPREDUCE-2925. Fixed Yarn+MR client code to behave saner with completed
jobs. (Devaraj K via vinodkv)
Release 0.22.0 - Unreleased
INCOMPATIBLE CHANGES

8
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/main/java/org/apache/hadoop/mapred/ClientCache.java
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@ -23,6 +23,7 @@ import java.security.PrivilegedAction;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
@ -74,8 +75,11 @@ public class ClientCache {
private MRClientProtocol instantiateHistoryProxy()
throws IOException {
final String serviceAddr = conf.get(JHAdminConfig.MR_HISTORY_ADDRESS,
JHAdminConfig.DEFAULT_MR_HISTORY_ADDRESS);
final String serviceAddr = conf.get(JHAdminConfig.MR_HISTORY_ADDRESS);
if (StringUtils.isEmpty(serviceAddr)) {
LOG.info("HistoryServer is not configured.");
return null;
}
LOG.info("Connecting to HistoryServer at: " + serviceAddr);
final Configuration myConf = new Configuration(conf);
myConf.setClass(YarnConfiguration.YARN_SECURITY_INFO,

35
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/main/java/org/apache/hadoop/mapred/ClientServiceDelegate.java
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@ -63,7 +63,6 @@ import org.apache.hadoop.yarn.api.records.ApplicationReport;
import org.apache.hadoop.yarn.api.records.ApplicationState;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.exceptions.YarnRemoteException;
import org.apache.hadoop.yarn.exceptions.impl.pb.YarnRemoteExceptionPBImpl;
import org.apache.hadoop.yarn.factories.RecordFactory;
import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider;
import org.apache.hadoop.yarn.ipc.RPCUtil;
@ -86,6 +85,7 @@ class ClientServiceDelegate {
private boolean forceRefresh;
private MRClientProtocol realProxy = null;
private RecordFactory recordFactory = RecordFactoryProvider.getRecordFactory(null);
private static String UNKNOWN_USER = "Unknown User";
ClientServiceDelegate(Configuration conf, ResourceMgrDelegate rm,
JobID jobId, MRClientProtocol historyServerProxy) {
@ -126,7 +126,12 @@ class ClientServiceDelegate {
// and redirect to the history server.
ApplicationReport application = rm.getApplicationReport(appId);
String serviceAddr = null;
while (ApplicationState.RUNNING.equals(application.getState())) {
while (application == null || ApplicationState.RUNNING.equals(application.getState())) {
if (application == null) {
LOG.info("Could not get Job info from RM for job " + jobId
+ ". Redirecting to job history server.");
return checkAndGetHSProxy(UNKNOWN_USER, JobState.NEW);
}
try {
if (application.getHost() == null || "".equals(application.getHost())) {
LOG.debug("AM not assigned to Job. Waiting to get the AM ...");
@ -163,6 +168,11 @@ class ClientServiceDelegate {
throw new YarnException(e1);
}
application = rm.getApplicationReport(appId);
if (application == null) {
LOG.info("Could not get Job info from RM for job " + jobId
+ ". Redirecting to job history server.");
return checkAndGetHSProxy(UNKNOWN_USER, JobState.RUNNING);
}
} catch (InterruptedException e) {
LOG.warn("getProxy() call interruped", e);
throw new YarnException(e);
@ -176,7 +186,7 @@ class ClientServiceDelegate {
String user = application.getUser();
if (user == null) {
throw new YarnRemoteExceptionPBImpl("User is not set in the application report");
throw RPCUtil.getRemoteException("User is not set in the application report");
}
if (application.getState() == ApplicationState.NEW ||
application.getState() == ApplicationState.SUBMITTED) {
@ -199,11 +209,19 @@ class ClientServiceDelegate {
if (application.getState() == ApplicationState.SUCCEEDED) {
LOG.info("Application state is completed. " +
"Redirecting to job history server");
realProxy = historyServerProxy;
realProxy = checkAndGetHSProxy(user, JobState.SUCCEEDED);
}
return realProxy;
}
private MRClientProtocol checkAndGetHSProxy(String user, JobState state) {
if (null == historyServerProxy) {
LOG.warn("Job History Server is not configured.");
return getNotRunningJob(user, state);
}
return historyServerProxy;
}
private void instantiateAMProxy(final String serviceAddr) throws IOException {
UserGroupInformation currentUser = UserGroupInformation.getCurrentUser();
LOG.trace("Connecting to ApplicationMaster at: " + serviceAddr);
@ -236,11 +254,14 @@ class ClientServiceDelegate {
try {
return methodOb.invoke(getProxy(), args);
} catch (YarnRemoteException yre) {
LOG.warn("Exception thrown by remote end.");
LOG.warn(RPCUtil.toString(yre));
LOG.warn("Exception thrown by remote end.", yre);
throw yre;
} catch (InvocationTargetException e) {
//TODO Finite # of errors before giving up?
if (e.getTargetException() instanceof YarnRemoteException) {
LOG.warn("Exception thrown by remote end.", e
.getTargetException());
throw (YarnRemoteException) e.getTargetException();
}
LOG.info("Failed to contact AM/History for job " + jobId
+ " Will retry..", e.getTargetException());
forceRefresh = true;

166
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestClientServiceDelegate.java Normal file
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@ -0,0 +1,166 @@
/**
* 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.mapred;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
import junit.framework.Assert;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapreduce.JobID;
import org.apache.hadoop.mapreduce.JobStatus;
import org.apache.hadoop.mapreduce.MRConfig;
import org.apache.hadoop.mapreduce.TypeConverter;
import org.apache.hadoop.mapreduce.v2.api.MRClientProtocol;
import org.apache.hadoop.mapreduce.v2.api.protocolrecords.GetJobReportRequest;
import org.apache.hadoop.mapreduce.v2.api.protocolrecords.GetJobReportResponse;
import org.apache.hadoop.mapreduce.v2.api.records.JobReport;
import org.apache.hadoop.mapreduce.v2.api.records.JobState;
import org.apache.hadoop.yarn.api.records.ApplicationReport;
import org.apache.hadoop.yarn.api.records.ApplicationState;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.exceptions.YarnRemoteException;
import org.apache.hadoop.yarn.ipc.RPCUtil;
import org.apache.hadoop.yarn.util.Records;
import org.junit.Test;
/**
* Tests for ClientServiceDelegate.java
*/
public class TestClientServiceDelegate {
private JobID oldJobId = JobID.forName("job_1315895242400_2");
private org.apache.hadoop.mapreduce.v2.api.records.JobId jobId = TypeConverter
.toYarn(oldJobId);
@Test
public void testUnknownAppInRM() throws Exception {
MRClientProtocol historyServerProxy = mock(MRClientProtocol.class);
when(historyServerProxy.getJobReport(getJobReportRequest())).thenReturn(
getJobReportResponse());
ClientServiceDelegate clientServiceDelegate = getClientServiceDelegate(
historyServerProxy, getRMDelegate());
JobStatus jobStatus = clientServiceDelegate.getJobStatus(oldJobId);
Assert.assertNotNull(jobStatus);
}
@Test
public void testRemoteExceptionFromHistoryServer() throws Exception {
MRClientProtocol historyServerProxy = mock(MRClientProtocol.class);
when(historyServerProxy.getJobReport(getJobReportRequest())).thenThrow(
RPCUtil.getRemoteException("Job ID doesnot Exist"));
ResourceMgrDelegate rm = mock(ResourceMgrDelegate.class);
when(rm.getApplicationReport(TypeConverter.toYarn(oldJobId).getAppId()))
.thenReturn(null);
ClientServiceDelegate clientServiceDelegate = getClientServiceDelegate(
historyServerProxy, rm);
try {
clientServiceDelegate.getJobStatus(oldJobId);
Assert.fail("Invoke should throw exception after retries.");
} catch (YarnRemoteException e) {
Assert.assertEquals("Job ID doesnot Exist", e.getMessage());
}
}
@Test
public void testRetriesOnConnectionFailure() throws Exception {
MRClientProtocol historyServerProxy = mock(MRClientProtocol.class);
when(historyServerProxy.getJobReport(getJobReportRequest())).thenThrow(
new RuntimeException("1")).thenThrow(new RuntimeException("2"))
.thenThrow(new RuntimeException("3"))
.thenReturn(getJobReportResponse());
ResourceMgrDelegate rm = mock(ResourceMgrDelegate.class);
when(rm.getApplicationReport(TypeConverter.toYarn(oldJobId).getAppId()))
.thenReturn(null);
ClientServiceDelegate clientServiceDelegate = getClientServiceDelegate(
historyServerProxy, rm);
JobStatus jobStatus = clientServiceDelegate.getJobStatus(oldJobId);
Assert.assertNotNull(jobStatus);
}
@Test
public void testHistoryServerNotConfigured() throws Exception {
//RM doesn't have app report and job History Server is not configured
ClientServiceDelegate clientServiceDelegate = getClientServiceDelegate(
null, getRMDelegate());
JobStatus jobStatus = clientServiceDelegate.getJobStatus(oldJobId);
Assert.assertEquals("Unknown User", jobStatus.getUsername());
Assert.assertEquals(JobStatus.State.PREP, jobStatus.getState());
//RM has app report and job History Server is not configured
ResourceMgrDelegate rm = mock(ResourceMgrDelegate.class);
ApplicationReport applicationReport = getApplicationReport();
when(rm.getApplicationReport(jobId.getAppId())).thenReturn(
applicationReport);
clientServiceDelegate = getClientServiceDelegate(null, rm);
jobStatus = clientServiceDelegate.getJobStatus(oldJobId);
Assert.assertEquals(applicationReport.getUser(), jobStatus.getUsername());
Assert.assertEquals(JobStatus.State.SUCCEEDED, jobStatus.getState());
}
private GetJobReportRequest getJobReportRequest() {
GetJobReportRequest request = Records.newRecord(GetJobReportRequest.class);
request.setJobId(jobId);
return request;
}
private GetJobReportResponse getJobReportResponse() {
GetJobReportResponse jobReportResponse = Records
.newRecord(GetJobReportResponse.class);
JobReport jobReport = Records.newRecord(JobReport.class);
jobReport.setJobId(jobId);
jobReport.setJobState(JobState.SUCCEEDED);
jobReportResponse.setJobReport(jobReport);
return jobReportResponse;
}
private ApplicationReport getApplicationReport() {
ApplicationReport applicationReport = Records
.newRecord(ApplicationReport.class);
applicationReport.setState(ApplicationState.SUCCEEDED);
applicationReport.setUser("root");
return applicationReport;
}
private ResourceMgrDelegate getRMDelegate() throws YarnRemoteException {
ResourceMgrDelegate rm = mock(ResourceMgrDelegate.class);
when(rm.getApplicationReport(jobId.getAppId())).thenReturn(null);
return rm;
}
private ClientServiceDelegate getClientServiceDelegate(
MRClientProtocol historyServerProxy, ResourceMgrDelegate rm) {
Configuration conf = new YarnConfiguration();
conf.set(MRConfig.FRAMEWORK_NAME, "yarn");
ClientServiceDelegate clientServiceDelegate = new ClientServiceDelegate(
conf, rm, oldJobId, historyServerProxy);
return clientServiceDelegate;
}
}