[ 
https://issues.apache.org/jira/browse/HADOOP-1740?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Srikanth Kakani updated HADOOP-1740:
------------------------------------

    Description: 
Steps to reproduce:
Run a pipes job. I had 1182 mappers and 300 reducers and produced 4,353,892,559 
 records and 212,030,552,146 bytes output.

Some of the tasks failed (randomly), all had the same exception (probably a 
race condition)

task_200708201818_0002_m_000681_0       tip_200708201818_0002_m_000681  node075 
FAILED  

java.lang.NullPointerException
        at 
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:592)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:190)
        at 
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1800)

        Last 4KB
Last 8KB
All
task_200708201818_0002_m_000681_1       tip_200708201818_0002_m_000681  
node1127        FAILED  

java.lang.NullPointerException
        at 
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:592)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:190)
        at 
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1800)

        Last 4KB
Last 8KB
All
task_200708201818_0002_m_000868_0       tip_200708201818_0002_m_000868  node160 
FAILED  

java.io.IOException: Task process exit with nonzero status of 1.
        at org.apache.hadoop.mapred.TaskRunner.runChild(TaskRunner.java:405)
        at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:291)

        Last 4KB
Last 8KB
All

2007-08-20 19:25:59,909 INFO org.apache.hadoop.metrics.jvm.JvmMetrics: 
Initializing JVM Metrics with processName=MAP, sessionId=
2007-08-20 19:26:00,002 INFO org.apache.hadoop.mapred.MapTask: numReduceTasks: 
300
2007-08-20 19:26:01,344 INFO org.apache.hadoop.util.NativeCodeLoader: Loaded 
the native-hadoop library
2007-08-20 19:26:01,345 INFO org.apache.hadoop.io.compress.zlib.ZlibFactory: 
Successfully loaded & initialized native-zlib library
2007-08-20 19:49:26,727 WARN org.apache.hadoop.mapred.TaskTracker: Error 
running child
java.lang.NullPointerException
        at 
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:592)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:190)
        at 
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1800)

  was:
Steps to reproduce:
Run a pipes job. I had 1182 mappers and 300 reducers and produced 4,353,892,559 
 records and 212,030,552,146 bytes output.

Some of the tasks failed (randomly), all had the same exception (probably a 
race condition)

task_200708201818_0002_m_000681_0       tip_200708201818_0002_m_000681  
fwm521075.inktomisearch.com     FAILED  

java.lang.NullPointerException
        at 
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:592)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:190)
        at 
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1800)

        Last 4KB
Last 8KB
All
task_200708201818_0002_m_000681_1       tip_200708201818_0002_m_000681  
fwm521127.inktomisearch.com     FAILED  

java.lang.NullPointerException
        at 
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:592)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:190)
        at 
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1800)

        Last 4KB
Last 8KB
All
task_200708201818_0002_m_000868_0       tip_200708201818_0002_m_000868  
fwm521160.inktomisearch.com     FAILED  

java.io.IOException: Task process exit with nonzero status of 1.
        at org.apache.hadoop.mapred.TaskRunner.runChild(TaskRunner.java:405)
        at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:291)

        Last 4KB
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All

2007-08-20 19:25:59,909 INFO org.apache.hadoop.metrics.jvm.JvmMetrics: 
Initializing JVM Metrics with processName=MAP, sessionId=
2007-08-20 19:26:00,002 INFO org.apache.hadoop.mapred.MapTask: numReduceTasks: 
300
2007-08-20 19:26:01,344 INFO org.apache.hadoop.util.NativeCodeLoader: Loaded 
the native-hadoop library
2007-08-20 19:26:01,345 INFO org.apache.hadoop.io.compress.zlib.ZlibFactory: 
Successfully loaded & initialized native-zlib library
2007-08-20 19:49:26,727 WARN org.apache.hadoop.mapred.TaskTracker: Error 
running child
java.lang.NullPointerException
        at 
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:592)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:190)
        at 
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1800)


> Certain Pipes tasks fail, after exiting the C++ application
> -----------------------------------------------------------
>
>                 Key: HADOOP-1740
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1740
>             Project: Hadoop
>          Issue Type: Bug
>          Components: pipes
>         Environment: Version: 0.15.0-dev, r565628
> Compiled: Tue Aug 14 20:55:37 UTC 2007 by hadoopqa
> 165 nodes
>            Reporter: Srikanth Kakani
>            Priority: Blocker
>         Attachments: 1740.patch
>
>
> Steps to reproduce:
> Run a pipes job. I had 1182 mappers and 300 reducers and produced 
> 4,353,892,559  records and 212,030,552,146 bytes output.
> Some of the tasks failed (randomly), all had the same exception (probably a 
> race condition)
> task_200708201818_0002_m_000681_0     tip_200708201818_0002_m_000681  node075 
> FAILED  
> java.lang.NullPointerException
>       at 
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:592)
>       at org.apache.hadoop.mapred.MapTask.run(MapTask.java:190)
>       at 
> org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1800)
>       Last 4KB
> Last 8KB
> All
> task_200708201818_0002_m_000681_1     tip_200708201818_0002_m_000681  
> node1127        FAILED  
> java.lang.NullPointerException
>       at 
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:592)
>       at org.apache.hadoop.mapred.MapTask.run(MapTask.java:190)
>       at 
> org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1800)
>       Last 4KB
> Last 8KB
> All
> task_200708201818_0002_m_000868_0     tip_200708201818_0002_m_000868  node160 
> FAILED  
> java.io.IOException: Task process exit with nonzero status of 1.
>       at org.apache.hadoop.mapred.TaskRunner.runChild(TaskRunner.java:405)
>       at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:291)
>       Last 4KB
> Last 8KB
> All
> 2007-08-20 19:25:59,909 INFO org.apache.hadoop.metrics.jvm.JvmMetrics: 
> Initializing JVM Metrics with processName=MAP, sessionId=
> 2007-08-20 19:26:00,002 INFO org.apache.hadoop.mapred.MapTask: 
> numReduceTasks: 300
> 2007-08-20 19:26:01,344 INFO org.apache.hadoop.util.NativeCodeLoader: Loaded 
> the native-hadoop library
> 2007-08-20 19:26:01,345 INFO org.apache.hadoop.io.compress.zlib.ZlibFactory: 
> Successfully loaded & initialized native-zlib library
> 2007-08-20 19:49:26,727 WARN org.apache.hadoop.mapred.TaskTracker: Error 
> running child
> java.lang.NullPointerException
>       at 
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:592)
>       at org.apache.hadoop.mapred.MapTask.run(MapTask.java:190)
>       at 
> org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1800)

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