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From "Liyin Liang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-5799) add default value of MR_AM_ADMIN_USER_ENV
Date Tue, 18 Mar 2014 13:49:44 GMT
Liyin Liang created MAPREDUCE-5799:
--------------------------------------

             Summary: add default value of MR_AM_ADMIN_USER_ENV
                 Key: MAPREDUCE-5799
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5799
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
    Affects Versions: 2.3.0
            Reporter: Liyin Liang
            Priority: Minor


Submit a 1 map + 1 reduce sleep job with the following config:
{code}
  <property>
      <name>mapreduce.map.output.compress</name>
      <value>true</value>
  </property>
  <property>
      <name>mapreduce.map.output.compress.codec</name>
      <value>org.apache.hadoop.io.compress.SnappyCodec</value>
  </property>
<property>
  <name>mapreduce.job.ubertask.enable</name>
  <value>true</value>
</property>
{code}
And the LinuxContainerExecutor is enable on NodeManager.
This job will fail with the following error:
{code}
2014-03-18 21:28:20,153 FATAL [uber-SubtaskRunner] org.apache.hadoop.mapred.LocalContainerLauncher:
Error running local (uberized) 'child' : java.lang.UnsatisfiedLinkError: org.apache.hadoop.util.NativeCodeLoader.buildSupportsSnappy()Z
        at org.apache.hadoop.util.NativeCodeLoader.buildSupportsSnappy(Native Method)
        at org.apache.hadoop.io.compress.SnappyCodec.checkNativeCodeLoaded(SnappyCodec.java:63)
        at org.apache.hadoop.io.compress.SnappyCodec.getCompressorType(SnappyCodec.java:132)
        at org.apache.hadoop.io.compress.CodecPool.getCompressor(CodecPool.java:148)
        at org.apache.hadoop.io.compress.CodecPool.getCompressor(CodecPool.java:163)
        at org.apache.hadoop.mapred.IFile$Writer.<init>(IFile.java:115)
        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1583)
        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:1462)
        at org.apache.hadoop.mapred.MapTask$NewOutputCollector.close(MapTask.java:700)
        at org.apache.hadoop.mapred.MapTask.closeQuietly(MapTask.java:1990)
        at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:774)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:340)
        at org.apache.hadoop.mapred.LocalContainerLauncher$SubtaskRunner.runSubtask(LocalContainerLauncher.java:317)
        at org.apache.hadoop.mapred.LocalContainerLauncher$SubtaskRunner.run(LocalContainerLauncher.java:232)
        at java.lang.Thread.run(Thread.java:662)
{code}

When create a ContainerLaunchContext for task in TaskAttemptImpl.createCommonContainerLaunchContext(),
the DEFAULT_MAPRED_ADMIN_USER_ENV which is "LD_LIBRARY_PATH=$HADOOP_COMMON_HOME/lib/native"
is added to the environment. Where when create a ContainerLaunchContext for mrappmaster in
YARNRunner.createApplicationSubmissionContext(), there is no default environment. So the ubermode
job fails to find native lib.



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