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From "Bhallamudi Venkata Siva Kamesh (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-2341) Map and Reduce task JVMs are hanging infinitely
Date Mon, 21 Feb 2011 09:37:42 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2341?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Bhallamudi Venkata Siva Kamesh updated MAPREDUCE-2341:
------------------------------------------------------

    Priority: Major  (was: Critical)

> Map and Reduce task JVMs are hanging infinitely 
> ------------------------------------------------
>
>                 Key: MAPREDUCE-2341
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2341
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>         Environment: Linux
>            Reporter: Bhallamudi Venkata Siva Kamesh
>
> Description:
>  When launching Mapreduce application, the property *mapred.job.reuse.jvm.num.tasks*
has been set to *0*, as a result the task JVM(MAP or Reduce JVM) is hanging indefinitely and
finally being killed by Tasktracker.
> Steps to Reproduce
> ------------------
> 1) Set the *mapred.job.reuse.jvm.num.tasks* property in mapred-site.xml to 0
> 2) Execute the wordcount example, child JVM is hanging indefinitely and finally killed
by Tasktracker

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