MAPREDUCE-2937. Ensure reason for application failure is displayed to the user. Contributed by Mahadev Konar.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1166966 13f79535-47bb-0310-9956-ffa450edef68

hadoop-mapreduce-project/CHANGES.txt

@@ -1244,6 +1244,9 @@ Release 0.23.0 - Unreleased
    MAPREDUCE-2677. Fixed 404 for some links from HistoryServer. (Robert Evans
    via acmurthy) 
 
+   MAPREDUCE-2937. Ensure reason for application failure is displayed to the
+   user. (mahadev via acmurthy) 
+
 Release 0.22.0 - Unreleased
 
   INCOMPATIBLE CHANGES

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/main/java/org/apache/hadoop/mapred/YARNRunner.java

@@ -39,7 +39,7 @@ import org.apache.hadoop.fs.UnsupportedFileSystemException;
 import org.apache.hadoop.io.DataOutputBuffer;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.ipc.ProtocolSignature;
-import org.apache.hadoop.ipc.VersionedProtocol;
+import org.apache.hadoop.mapreduce.Cluster.JobTrackerStatus;
 import org.apache.hadoop.mapreduce.ClusterMetrics;
 import org.apache.hadoop.mapreduce.Counters;
 import org.apache.hadoop.mapreduce.JobContext;
@@ -55,7 +55,6 @@ import org.apache.hadoop.mapreduce.TaskReport;
 import org.apache.hadoop.mapreduce.TaskTrackerInfo;
 import org.apache.hadoop.mapreduce.TaskType;
 import org.apache.hadoop.mapreduce.TypeConverter;
-import org.apache.hadoop.mapreduce.Cluster.JobTrackerStatus;
 import org.apache.hadoop.mapreduce.filecache.DistributedCache;
 import org.apache.hadoop.mapreduce.protocol.ClientProtocol;
 import org.apache.hadoop.mapreduce.security.token.delegation.DelegationTokenIdentifier;
@@ -81,7 +80,6 @@ import org.apache.hadoop.yarn.api.records.URL;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.factories.RecordFactory;
 import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider;
-import org.apache.hadoop.yarn.ipc.RPCUtil;
 import org.apache.hadoop.yarn.util.ConverterUtils;
 
 
@@ -104,9 +102,19 @@ public class YARNRunner implements ClientProtocol {
    * @param conf the configuration object for the client
    */
   public YARNRunner(Configuration conf) {
+    this(conf, new ResourceMgrDelegate(conf));
+  }
+
+  /**
+   * Similar to {@link #YARNRunner(Configuration)} but allowing injecting 
+   * {@link ResourceMgrDelegate}. Enables mocking and testing.
+   * @param conf the configuration object for the client
+   * @param resMgrDelegate the resourcemanager client handle.
+   */
+  public YARNRunner(Configuration conf, ResourceMgrDelegate resMgrDelegate) {
     this.conf = new YarnConfiguration(conf);
     try {
-      this.resMgrDelegate = new ResourceMgrDelegate(this.conf);
+      this.resMgrDelegate = resMgrDelegate;
       this.clientCache = new ClientCache(this.conf,
           resMgrDelegate);
       this.defaultFileContext = FileContext.getFileContext(this.conf);
@@ -114,7 +122,7 @@ public class YARNRunner implements ClientProtocol {
       throw new RuntimeException("Error in instantiating YarnClient", ufe);
     }
   }
-
+  
   @Override
   public void cancelDelegationToken(Token<DelegationTokenIdentifier> arg0)
       throws IOException, InterruptedException {
@@ -242,7 +250,8 @@ public class YARNRunner implements ClientProtocol {
         .getApplicationReport(applicationId);
     if (appMaster == null || appMaster.getState() == ApplicationState.FAILED 
         || appMaster.getState() == ApplicationState.KILLED) {
-      throw RPCUtil.getRemoteException("failed to run job");
+      throw new IOException("Failed to run job : " + 
+        appMaster.getDiagnostics());
     }
     return clientCache.getClient(jobId).getJobStatus(jobId);
   }
@@ -260,7 +269,7 @@ public class YARNRunner implements ClientProtocol {
     return rsrc;
   }
 
-  private ApplicationSubmissionContext createApplicationSubmissionContext(
+  public ApplicationSubmissionContext createApplicationSubmissionContext(
       Configuration jobConf,
       String jobSubmitDir, Credentials ts) throws IOException {
     ApplicationSubmissionContext appContext =

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/v2/TestYARNRunner.java

@@ -0,0 +1,124 @@
+/**
+ * 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.mapreduce.v2;
+
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+import junit.framework.TestCase;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileContext;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.mapred.ResourceMgrDelegate;
+import org.apache.hadoop.mapred.YARNRunner;
+import org.apache.hadoop.mapreduce.JobID;
+import org.apache.hadoop.mapreduce.TypeConverter;
+import org.apache.hadoop.security.Credentials;
+import org.apache.hadoop.yarn.api.records.ApplicationId;
+import org.apache.hadoop.yarn.api.records.ApplicationReport;
+import org.apache.hadoop.yarn.api.records.ApplicationState;
+import org.apache.hadoop.yarn.api.records.ApplicationSubmissionContext;
+import org.apache.hadoop.yarn.factories.RecordFactory;
+import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
+
+/**
+ * Test if the jobclient shows enough diagnostics 
+ * on a job failure.
+ *
+ */
+public class TestYARNRunner extends TestCase {
+  private static final Log LOG = LogFactory.getLog(TestYARNRunner.class);
+  private static final RecordFactory recordFactory = RecordFactoryProvider.getRecordFactory(null);
+ 
+  private YARNRunner yarnRunner;
+  private ResourceMgrDelegate resourceMgrDelegate;
+  private Configuration conf;
+  private ApplicationId appId;
+  private JobID jobId;
+  private File testWorkDir = 
+      new File("target", TestYARNRunner.class.getName());
+  private ApplicationSubmissionContext submissionContext;
+  private static final String failString = "Rejected job";
+ 
+  @Before
+  public void setUp() throws Exception {
+    resourceMgrDelegate = mock(ResourceMgrDelegate.class);
+    conf = new Configuration();
+    yarnRunner = new YARNRunner(conf, resourceMgrDelegate);
+    yarnRunner = spy(yarnRunner);
+    submissionContext = mock(ApplicationSubmissionContext.class);
+    doAnswer(
+        new Answer<ApplicationSubmissionContext>() {
+          @Override
+          public ApplicationSubmissionContext answer(InvocationOnMock invocation)
+              throws Throwable {
+            return submissionContext;
+          }
+        }
+        ).when(yarnRunner).createApplicationSubmissionContext(any(Configuration.class),
+            any(String.class), any(Credentials.class));
+    
+    appId = recordFactory.newRecordInstance(ApplicationId.class);
+    appId.setClusterTimestamp(System.currentTimeMillis());
+    appId.setId(1);
+    jobId = TypeConverter.fromYarn(appId);
+    if (testWorkDir.exists()) {
+      FileContext.getLocalFSFileContext().delete(new Path(testWorkDir.toString()), true);
+    }
+    testWorkDir.mkdirs();
+   }
+  
+  
+  @Test
+  public void testJobSubmissionFailure() throws Exception {
+    when(resourceMgrDelegate.submitApplication(any(ApplicationSubmissionContext.class))).
+    thenReturn(appId);
+    ApplicationReport report = mock(ApplicationReport.class);
+    when(report.getApplicationId()).thenReturn(appId);
+    when(report.getDiagnostics()).thenReturn(failString);
+    when(report.getState()).thenReturn(ApplicationState.FAILED);
+    when(resourceMgrDelegate.getApplicationReport(appId)).thenReturn(report);
+    Credentials credentials = new Credentials();
+    File jobxml = new File(testWorkDir, "job.xml");
+    OutputStream out = new FileOutputStream(jobxml);
+    conf.writeXml(out);
+    out.close();
+    try {
+      yarnRunner.submitJob(jobId, testWorkDir.getAbsolutePath().toString(), credentials); 
+    } catch(IOException io) {
+      LOG.info("Logging exception:", io);
+      assertTrue(io.getLocalizedMessage().contains(failString));
+    }
+  }
+}