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From aengin...@apache.org
Subject [14/31] hadoop git commit: YARN-857. Localization failures should be available in container diagnostics. Contributed by Vinod Kumar Vavilapalli.
Date Fri, 27 May 2016 04:39:48 GMT
YARN-857. Localization failures should be available in container diagnostics. Contributed by
 Vinod Kumar Vavilapalli.


Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/c380a220
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/c380a220
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/c380a220

Branch: refs/heads/HDFS-1312
Commit: c380a22031a62e2d2fe533079e3780f06b069943
Parents: 48c9313
Author: Varun Vasudev <vvasudev@apache.org>
Authored: Wed May 25 18:41:05 2016 +0530
Committer: Varun Vasudev <vvasudev@apache.org>
Committed: Wed May 25 19:01:12 2016 +0530

----------------------------------------------------------------------
 .../nodemanager/DefaultContainerExecutor.java   | 22 +++--
 .../localizer/ContainerLocalizer.java           | 40 +++++----
 .../TestDefaultContainerExecutor.java           | 89 ++++++++++++--------
 .../MockLocalizerHeartbeatResponse.java         |  7 +-
 .../localizer/TestContainerLocalizer.java       | 41 +++++++--
 5 files changed, 130 insertions(+), 69 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/hadoop/blob/c380a220/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/DefaultContainerExecutor.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/DefaultContainerExecutor.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/DefaultContainerExecutor.java
index c8048e9..8f4b122 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/DefaultContainerExecutor.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/DefaultContainerExecutor.java
@@ -18,8 +18,6 @@
 
 package org.apache.hadoop.yarn.server.nodemanager;
 
-import com.google.common.base.Optional;
-
 import static org.apache.hadoop.fs.CreateFlag.CREATE;
 import static org.apache.hadoop.fs.CreateFlag.OVERWRITE;
 
@@ -38,14 +36,15 @@ import java.util.Map;
 import org.apache.commons.lang.math.RandomUtils;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.fs.FileContext;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.fs.UnsupportedFileSystemException;
 import org.apache.hadoop.fs.permission.FsPermission;
 import org.apache.hadoop.io.IOUtils;
 import org.apache.hadoop.util.Shell;
-import org.apache.hadoop.util.Shell.ExitCodeException;
 import org.apache.hadoop.util.Shell.CommandExecutor;
+import org.apache.hadoop.util.Shell.ExitCodeException;
 import org.apache.hadoop.util.Shell.ShellCommandExecutor;
 import org.apache.hadoop.util.StringUtils;
 import org.apache.hadoop.yarn.api.records.ContainerId;
@@ -64,6 +63,7 @@ import org.apache.hadoop.yarn.server.nodemanager.executor.LocalizerStartContext;
 import org.apache.hadoop.yarn.util.ConverterUtils;
 
 import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Optional;
 
 public class DefaultContainerExecutor extends ContainerExecutor {
 
@@ -134,13 +134,25 @@ public class DefaultContainerExecutor extends ContainerExecutor {
     localizerFc.setWorkingDirectory(appStorageDir);
     LOG.info("Localizer CWD set to " + appStorageDir + " = " 
         + localizerFc.getWorkingDirectory());
+
     ContainerLocalizer localizer =
-        new ContainerLocalizer(localizerFc, user, appId, locId, 
-            getPaths(localDirs), RecordFactoryProvider.getRecordFactory(getConf()));
+        createContainerLocalizer(user, appId, locId, localDirs, localizerFc);
     // TODO: DO it over RPC for maintaining similarity?
     localizer.runLocalization(nmAddr);
   }
 
+  @Private
+  @VisibleForTesting
+  protected ContainerLocalizer createContainerLocalizer(String user,
+      String appId, String locId, List<String> localDirs,
+      FileContext localizerFc) throws IOException {
+    ContainerLocalizer localizer =
+        new ContainerLocalizer(localizerFc, user, appId, locId,
+            getPaths(localDirs),
+            RecordFactoryProvider.getRecordFactory(getConf()));
+    return localizer;
+  }
+
   @Override
   public int launchContainer(ContainerStartContext ctx) throws IOException {
     Container container = ctx.getContainer();

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c380a220/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/ContainerLocalizer.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/ContainerLocalizer.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/ContainerLocalizer.java
index 927699e..57cc346 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/ContainerLocalizer.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/ContainerLocalizer.java
@@ -39,6 +39,7 @@ import java.util.concurrent.TimeUnit;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileContext;
 import org.apache.hadoop.fs.FileSystem;
@@ -70,6 +71,7 @@ import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.secu
 import org.apache.hadoop.yarn.util.ConverterUtils;
 import org.apache.hadoop.yarn.util.FSDownload;
 
+import com.google.common.annotations.VisibleForTesting;
 import com.google.common.util.concurrent.ThreadFactoryBuilder;
 
 public class ContainerLocalizer {
@@ -117,14 +119,16 @@ public class ContainerLocalizer {
     this.pendingResources = new HashMap<LocalResource,Future<Path>>();
   }
 
-  LocalizationProtocol getProxy(final InetSocketAddress nmAddr) {
+  @Private
+  @VisibleForTesting
+  public LocalizationProtocol getProxy(final InetSocketAddress nmAddr) {
     YarnRPC rpc = YarnRPC.create(conf);
     return (LocalizationProtocol)
       rpc.getProxy(LocalizationProtocol.class, nmAddr, conf);
   }
 
   @SuppressWarnings("deprecation")
-  public int runLocalization(final InetSocketAddress nmAddr)
+  public void runLocalization(final InetSocketAddress nmAddr)
       throws IOException, InterruptedException {
     // load credentials
     initDirs(conf, user, appId, lfs, localDirs);
@@ -168,12 +172,9 @@ public class ContainerLocalizer {
       exec = createDownloadThreadPool();
       CompletionService<Path> ecs = createCompletionService(exec);
       localizeFiles(nodeManager, ecs, ugi);
-      return 0;
+      return;
     } catch (Throwable e) {
-      // Print traces to stdout so that they can be logged by the NM address
-      // space.
-      e.printStackTrace(System.out);
-      return -1;
+      throw new IOException(e);
     } finally {
       try {
         if (exec != null) {
@@ -229,7 +230,7 @@ public class ContainerLocalizer {
 
   protected void localizeFiles(LocalizationProtocol nodemanager,
       CompletionService<Path> cs, UserGroupInformation ugi)
-      throws IOException {
+      throws IOException, YarnException {
     while (true) {
       try {
         LocalizerStatus status = createStatus();
@@ -251,10 +252,15 @@ public class ContainerLocalizer {
             pending.cancel(true);
           }
           status = createStatus();
-          // ignore response
+          // ignore response while dying.
           try {
             nodemanager.heartbeat(status);
-          } catch (YarnException e) { }
+          } catch (YarnException e) {
+            // Cannot do anything about this during death stage, let's just log
+            // it.
+            e.printStackTrace(System.out);
+            LOG.error("Heartbeat failed while dying: ", e);
+          }
           return;
         }
         cs.poll(1000, TimeUnit.MILLISECONDS);
@@ -262,7 +268,7 @@ public class ContainerLocalizer {
         return;
       } catch (YarnException e) {
         // TODO cleanup
-        return;
+        throw e;
       }
     }
   }
@@ -380,16 +386,14 @@ public class ContainerLocalizer {
           new ContainerLocalizer(FileContext.getLocalFSFileContext(), user,
               appId, locId, localDirs,
               RecordFactoryProvider.getRecordFactory(null));
-      int nRet = localizer.runLocalization(nmAddr);
-      if (LOG.isDebugEnabled()) {
-        LOG.debug(String.format("nRet: %d", nRet));
-      }
-      System.exit(nRet);
+      localizer.runLocalization(nmAddr);
+      return;
     } catch (Throwable e) {
-      // Print error to stdout so that LCE can use it.
+      // Print traces to stdout so that they can be logged by the NM address
+      // space in both DefaultCE and LCE cases
       e.printStackTrace(System.out);
       LOG.error("Exception in main:", e);
-      throw e;
+      System.exit(-1);
     }
   }
 

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c380a220/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/TestDefaultContainerExecutor.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/TestDefaultContainerExecutor.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/TestDefaultContainerExecutor.java
index 5696ae8..e2ec693 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/TestDefaultContainerExecutor.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/TestDefaultContainerExecutor.java
@@ -20,65 +20,59 @@ package org.apache.hadoop.yarn.server.nodemanager;
 
 import static org.apache.hadoop.fs.CreateFlag.CREATE;
 import static org.apache.hadoop.fs.CreateFlag.OVERWRITE;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.isA;
+import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.when;
 import static org.mockito.Mockito.spy;
-import static org.mockito.Mockito.any;
-import static org.mockito.Mockito.doAnswer;
-import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
 
 import java.io.BufferedWriter;
 import java.io.DataOutputStream;
 import java.io.File;
 import java.io.FileNotFoundException;
-import java.io.FileReader;
 import java.io.FileWriter;
-import java.io.InputStream;
 import java.io.IOException;
-import java.io.LineNumberReader;
 import java.net.InetSocketAddress;
 import java.util.ArrayList;
 import java.util.EnumSet;
 import java.util.HashMap;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Random;
 
-
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.fs.AbstractFileSystem;
 import org.apache.hadoop.fs.CommonConfigurationKeys;
-import org.apache.hadoop.fs.FSDataInputStream;
 import org.apache.hadoop.fs.FSDataOutputStream;
 import org.apache.hadoop.fs.FileContext;
 import org.apache.hadoop.fs.FileStatus;
-import org.apache.hadoop.fs.FileUtil;
 import org.apache.hadoop.fs.FsStatus;
-import org.apache.hadoop.fs.Options.CreateOpts;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.fs.permission.FsPermission;
-import org.apache.hadoop.io.DataInputBuffer;
-import org.apache.hadoop.io.DataOutputBuffer;
 import org.apache.hadoop.security.Credentials;
-import org.apache.hadoop.util.Progressable;
 import org.apache.hadoop.util.Shell;
+import org.apache.hadoop.util.StringUtils;
 import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
 import org.apache.hadoop.yarn.api.records.ContainerId;
 import org.apache.hadoop.yarn.api.records.ContainerLaunchContext;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
+import org.apache.hadoop.yarn.exceptions.YarnException;
+import org.apache.hadoop.yarn.server.nodemanager.api.LocalizationProtocol;
+import org.apache.hadoop.yarn.server.nodemanager.api.ResourceLocalizationSpec;
+import org.apache.hadoop.yarn.server.nodemanager.api.protocolrecords.LocalizerAction;
+import org.apache.hadoop.yarn.server.nodemanager.api.protocolrecords.LocalizerStatus;
 import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container;
 import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.ContainerDiagnosticsUpdateEvent;
 import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ContainerLocalizer;
-import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.FakeFSDataInputStream;
-
+import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.MockLocalizerHeartbeatResponse;
 import org.apache.hadoop.yarn.server.nodemanager.executor.ContainerStartContext;
 import org.apache.hadoop.yarn.server.nodemanager.executor.DeletionAsUserContext;
 import org.apache.hadoop.yarn.server.nodemanager.executor.LocalizerStartContext;
-import org.junit.After;
 import org.junit.AfterClass;
 import org.junit.Assert;
-import org.junit.Before;
 import org.junit.Test;
 import org.mockito.invocation.InvocationOnMock;
 import org.mockito.stubbing.Answer;
@@ -345,10 +339,9 @@ public class TestDefaultContainerExecutor {
   }
 
   @Test(timeout = 30000)
-  public void testStartLocalizer()
-      throws IOException, InterruptedException {
-    InetSocketAddress localizationServerAddress;
-    
+  public void testStartLocalizer() throws IOException, InterruptedException,
+      YarnException {
+
     final Path firstDir = new Path(BASE_TMP_PATH, "localDir1");
     List<String> localDirs = new ArrayList<String>();
     final Path secondDir = new Path(BASE_TMP_PATH, "localDir2");
@@ -358,11 +351,6 @@ public class TestDefaultContainerExecutor {
     FsPermission perms = new FsPermission((short)0770);
 
     Configuration conf = new Configuration();
-    localizationServerAddress = conf.getSocketAddr(
-        YarnConfiguration.NM_BIND_HOST,
-        YarnConfiguration.NM_LOCALIZER_ADDRESS,
-        YarnConfiguration.DEFAULT_NM_LOCALIZER_ADDRESS,
-        YarnConfiguration.DEFAULT_NM_LOCALIZER_PORT);
 
     final FileContext mockLfs = spy(FileContext.getLocalFSFileContext(conf));
     final FileContext.Util mockUtil = spy(mockLfs.util());
@@ -400,6 +388,7 @@ public class TestDefaultContainerExecutor {
         return null;
       }
     }).when(mockUtil).copy(any(Path.class), any(Path.class));
+
     doAnswer(new Answer() {
       @Override
       public Object answer(InvocationOnMock invocationOnMock)
@@ -415,8 +404,33 @@ public class TestDefaultContainerExecutor {
       }
     }).when(mockLfs).getFsStatus(any(Path.class));
 
-    DefaultContainerExecutor mockExec = spy(new DefaultContainerExecutor(
-        mockLfs));
+    DefaultContainerExecutor mockExec =
+        spy(new DefaultContainerExecutor(mockLfs) {
+          @Override
+          public ContainerLocalizer createContainerLocalizer(String user,
+              String appId, String locId, List<String> localDirs,
+              FileContext localizerFc) throws IOException {
+
+            // Spy on the localizer and make it return valid heart-beat
+            // responses even though there is no real NodeManager.
+            ContainerLocalizer localizer =
+                super.createContainerLocalizer(user, appId, locId, localDirs,
+                  localizerFc);
+            ContainerLocalizer spyLocalizer = spy(localizer);
+            LocalizationProtocol nmProxy = mock(LocalizationProtocol.class);
+            try {
+              when(nmProxy.heartbeat(isA(LocalizerStatus.class))).thenReturn(
+                  new MockLocalizerHeartbeatResponse(LocalizerAction.DIE,
+                      new ArrayList<ResourceLocalizationSpec>()));
+            } catch (YarnException e) {
+              throw new IOException(e);
+            }
+            when(spyLocalizer.getProxy(any(InetSocketAddress.class)))
+              .thenReturn(nmProxy);
+
+            return spyLocalizer;
+          }
+        });
     mockExec.setConf(conf);
     localDirs.add(mockLfs.makeQualified(firstDir).toString());
     localDirs.add(mockLfs.makeQualified(secondDir).toString());
@@ -433,18 +447,20 @@ public class TestDefaultContainerExecutor {
     LocalDirsHandlerService  dirsHandler = mock(LocalDirsHandlerService.class);
     when(dirsHandler.getLocalDirs()).thenReturn(localDirs);
     when(dirsHandler.getLogDirs()).thenReturn(logDirs);
-    
+
     try {
       mockExec.startLocalizer(new LocalizerStartContext.Builder()
           .setNmPrivateContainerTokens(nmPrivateCTokensPath)
-          .setNmAddr(localizationServerAddress)
+          .setNmAddr(null)
           .setUser(appSubmitter)
           .setAppId(appId)
           .setLocId(locId)
           .setDirsHandler(dirsHandler)
           .build());
+
     } catch (IOException e) {
-      Assert.fail("StartLocalizer failed to copy token file " + e);
+      Assert.fail("StartLocalizer failed to copy token file: "
+          + StringUtils.stringifyException(e));
     } finally {
       mockExec.deleteAsUser(new DeletionAsUserContext.Builder()
           .setUser(appSubmitter)
@@ -460,7 +476,12 @@ public class TestDefaultContainerExecutor {
           .build());
       deleteTmpFiles();
     }
+
+    // Verify that the calls happen the expected number of times
+    verify(mockUtil, times(1)).copy(any(Path.class), any(Path.class));
+    verify(mockLfs, times(2)).getFsStatus(any(Path.class));
   }
+
 //  @Test
 //  public void testInit() throws IOException, InterruptedException {
 //    Configuration conf = new Configuration();

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c380a220/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/MockLocalizerHeartbeatResponse.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/MockLocalizerHeartbeatResponse.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/MockLocalizerHeartbeatResponse.java
index 1fcf5bf..1f444c5 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/MockLocalizerHeartbeatResponse.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/MockLocalizerHeartbeatResponse.java
@@ -17,7 +17,6 @@
 */
 package org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer;
 
-import java.util.ArrayList;
 import java.util.List;
 
 import org.apache.hadoop.yarn.server.nodemanager.api.ResourceLocalizationSpec;
@@ -30,11 +29,7 @@ public class MockLocalizerHeartbeatResponse
   LocalizerAction action;
   List<ResourceLocalizationSpec> resourceSpecs;
 
-  MockLocalizerHeartbeatResponse() {
-    resourceSpecs = new ArrayList<ResourceLocalizationSpec>();
-  }
-
-  MockLocalizerHeartbeatResponse(
+  public MockLocalizerHeartbeatResponse(
       LocalizerAction action, List<ResourceLocalizationSpec> resources) {
     this.action = action;
     this.resourceSpecs = resources;

http://git-wip-us.apache.org/repos/asf/hadoop/blob/c380a220/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/TestContainerLocalizer.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/TestContainerLocalizer.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/TestContainerLocalizer.java
index 22fad6f..611fc05 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/TestContainerLocalizer.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/TestContainerLocalizer.java
@@ -17,7 +17,6 @@
 */
 package org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer;
 
-import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.fail;
 import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.anyBoolean;
@@ -65,6 +64,7 @@ import org.apache.hadoop.yarn.api.records.LocalResource;
 import org.apache.hadoop.yarn.api.records.LocalResourceType;
 import org.apache.hadoop.yarn.api.records.LocalResourceVisibility;
 import org.apache.hadoop.yarn.api.records.URL;
+import org.apache.hadoop.yarn.exceptions.YarnException;
 import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
 import org.apache.hadoop.yarn.factories.RecordFactory;
 import org.apache.hadoop.yarn.server.nodemanager.api.LocalizationProtocol;
@@ -73,6 +73,7 @@ import org.apache.hadoop.yarn.server.nodemanager.api.protocolrecords.LocalResour
 import org.apache.hadoop.yarn.server.nodemanager.api.protocolrecords.LocalizerAction;
 import org.apache.hadoop.yarn.server.nodemanager.api.protocolrecords.LocalizerStatus;
 import org.apache.hadoop.yarn.util.ConverterUtils;
+import org.junit.Assert;
 import org.junit.Test;
 import org.mockito.ArgumentMatcher;
 import org.mockito.invocation.InvocationOnMock;
@@ -98,7 +99,7 @@ public class TestContainerLocalizer {
   private LocalizationProtocol nmProxy;
 
   @Test
-  public void testContainerLocalizerMain() throws Exception {
+  public void testMain() throws Exception {
     FileContext fs = FileContext.getLocalFSFileContext();
     spylfs = spy(fs.getDefaultFileSystem());
     ContainerLocalizer localizer =
@@ -167,7 +168,7 @@ public class TestContainerLocalizer {
         isA(UserGroupInformation.class));
 
     // run localization
-    assertEquals(0, localizer.runLocalization(nmAddr));
+    localizer.runLocalization(nmAddr);
     for (Path p : localDirs) {
       Path base = new Path(new Path(p, ContainerLocalizer.USERCACHE), appUser);
       Path privcache = new Path(base, ContainerLocalizer.FILECACHE);
@@ -198,7 +199,27 @@ public class TestContainerLocalizer {
           }
         }));
   }
-  
+
+  @Test(timeout = 15000)
+  public void testMainFailure() throws Exception {
+
+    FileContext fs = FileContext.getLocalFSFileContext();
+    spylfs = spy(fs.getDefaultFileSystem());
+    ContainerLocalizer localizer = setupContainerLocalizerForTest();
+
+    // Assume the NM heartbeat fails say because of absent tokens.
+    when(nmProxy.heartbeat(isA(LocalizerStatus.class))).thenThrow(
+        new YarnException("Sigh, no token!"));
+
+    // run localization, it should fail
+    try {
+      localizer.runLocalization(nmAddr);
+      Assert.fail("Localization succeeded unexpectedly!");
+    } catch (IOException e) {
+      Assert.assertTrue(e.getMessage().contains("Sigh, no token!"));
+    }
+  }
+
   @Test
   @SuppressWarnings("unchecked")
   public void testLocalizerTokenIsGettingRemoved() throws Exception {
@@ -214,18 +235,22 @@ public class TestContainerLocalizer {
   @Test
   @SuppressWarnings("unchecked") // mocked generics
   public void testContainerLocalizerClosesFilesystems() throws Exception {
+
     // verify filesystems are closed when localizer doesn't fail
     FileContext fs = FileContext.getLocalFSFileContext();
     spylfs = spy(fs.getDefaultFileSystem());
+
     ContainerLocalizer localizer = setupContainerLocalizerForTest();
     doNothing().when(localizer).localizeFiles(any(LocalizationProtocol.class),
         any(CompletionService.class), any(UserGroupInformation.class));
     verify(localizer, never()).closeFileSystems(
         any(UserGroupInformation.class));
+
     localizer.runLocalization(nmAddr);
     verify(localizer).closeFileSystems(any(UserGroupInformation.class));
 
     spylfs = spy(fs.getDefaultFileSystem());
+
     // verify filesystems are closed when localizer fails
     localizer = setupContainerLocalizerForTest();
     doThrow(new YarnRuntimeException("Forced Failure")).when(localizer).localizeFiles(
@@ -233,8 +258,12 @@ public class TestContainerLocalizer {
         any(UserGroupInformation.class));
     verify(localizer, never()).closeFileSystems(
         any(UserGroupInformation.class));
-    localizer.runLocalization(nmAddr);
-    verify(localizer).closeFileSystems(any(UserGroupInformation.class));
+    try {
+      localizer.runLocalization(nmAddr);
+      Assert.fail("Localization succeeded unexpectedly!");
+    } catch (IOException e) {
+      verify(localizer).closeFileSystems(any(UserGroupInformation.class));
+    }
   }
 
   @SuppressWarnings("unchecked") // mocked generics


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