MAPREDUCE-5813. Fix YarnChild to explicitly load job.xml from the local-filesystem, rather than rely on the classpath. Contributed by Gera Shegalov.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1583050 13f79535-47bb-0310-9956-ffa450edef68

hadoop-mapreduce-project/CHANGES.txt

@@ -272,6 +272,10 @@ Release 2.4.0 - UNRELEASED
     MAPREDUCE-5810. Removed the faulty and failing streaming test
     TestStreamingTaskLog. (Akira Ajisaka via vinodkv)
 
+    MAPREDUCE-5813. Fix YarnChild to explicitly load job.xml from the
+    local-filesystem, rather than rely on the classpath. (Gera Shegalov via
+    acmurthy) 
+
 Release 2.3.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapred/YarnChild.java

@@ -76,10 +76,9 @@ class YarnChild {
     Thread.setDefaultUncaughtExceptionHandler(new YarnUncaughtExceptionHandler());
     LOG.debug("Child starting");
 
-    final JobConf job = new JobConf();
+    final JobConf job = new JobConf(MRJobConfig.JOB_CONF_FILE);
     // Initing with our JobConf allows us to avoid loading confs twice
     Limits.init(job);
-    job.addResource(MRJobConfig.JOB_CONF_FILE);
     UserGroupInformation.setConfiguration(job);
 
     String host = args[0];

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

@@ -41,6 +41,7 @@ import org.apache.hadoop.FailingMapper;
 import org.apache.hadoop.RandomTextWriterJob;
 import org.apache.hadoop.RandomTextWriterJob.RandomInputFormat;
 import org.apache.hadoop.SleepJob;
+import org.apache.hadoop.SleepJob.SleepMapper;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.CommonConfigurationKeysPublic;
 import org.apache.hadoop.fs.FSDataOutputStream;
@@ -98,6 +99,7 @@ public class TestMRJobs {
   private static final EnumSet<RMAppState> TERMINAL_RM_APP_STATES =
       EnumSet.of(RMAppState.FINISHED, RMAppState.FAILED, RMAppState.KILLED);
   private static final int NUM_NODE_MGRS = 3;
+  private static final String TEST_IO_SORT_MB = "11";
 
   protected static MiniMRYarnCluster mrCluster;
   protected static MiniDFSCluster dfsCluster;
@@ -205,6 +207,38 @@ public class TestMRJobs {
     // JobStatus?)--compare against MRJobConfig.JOB_UBERTASK_ENABLE value
   }
 
+  @Test(timeout = 300000)
+  public void testJobClassloader() throws IOException, InterruptedException,
+      ClassNotFoundException {
+    LOG.info("\n\n\nStarting testJobClassloader().");
+
+    if (!(new File(MiniMRYarnCluster.APPJAR)).exists()) {
+      LOG.info("MRAppJar " + MiniMRYarnCluster.APPJAR
+               + " not found. Not running test.");
+      return;
+    }
+    final Configuration sleepConf = new Configuration(mrCluster.getConfig());
+    // set master address to local to test that local mode applied iff framework == local
+    sleepConf.set(MRConfig.MASTER_ADDRESS, "local");
+    sleepConf.setBoolean(MRJobConfig.MAPREDUCE_JOB_CLASSLOADER, true);
+    sleepConf.set(MRJobConfig.IO_SORT_MB, TEST_IO_SORT_MB);
+    sleepConf.set(MRJobConfig.MR_AM_LOG_LEVEL, Level.ALL.toString());
+    sleepConf.set(MRJobConfig.MAP_LOG_LEVEL, Level.ALL.toString());
+    sleepConf.set(MRJobConfig.REDUCE_LOG_LEVEL, Level.ALL.toString());
+    sleepConf.set(MRJobConfig.MAP_JAVA_OPTS, "-verbose:class");
+    final SleepJob sleepJob = new SleepJob();
+    sleepJob.setConf(sleepConf);
+    final Job job = sleepJob.createJob(1, 1, 10, 1, 10, 1);
+    job.setMapperClass(ConfVerificationMapper.class);
+    job.addFileToClassPath(APP_JAR); // The AppMaster jar itself.
+    job.setJarByClass(SleepJob.class);
+    job.setMaxMapAttempts(1); // speed up failures
+    job.submit();
+    boolean succeeded = job.waitForCompletion(true);
+    Assert.assertTrue("Job status: " + job.getStatus().getFailureInfo(),
+        succeeded);
+  }
+
   protected void verifySleepJobCounters(Job job) throws InterruptedException,
       IOException {
     Counters counters = job.getCounters();
@@ -795,4 +829,18 @@ public class TestMRJobs {
     jos.closeEntry();
     jarFile.delete();
   }
+
+  public static class ConfVerificationMapper extends SleepMapper {
+    @Override
+    protected void setup(Context context)
+        throws IOException, InterruptedException {
+      super.setup(context);
+      final Configuration conf = context.getConfiguration();
+      final String ioSortMb = conf.get(MRJobConfig.IO_SORT_MB);
+      if (!TEST_IO_SORT_MB.equals(ioSortMb)) {
+        throw new IOException("io.sort.mb expected: " + TEST_IO_SORT_MB
+            + ", actual: "  + ioSortMb);
+      }
+    }
+  }
 }