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From "Ravi Gummadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5194) DiskErrorException in TaskTracker when running a job
Date Thu, 05 Mar 2009 13:05:58 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12679187#action_12679187

Ravi Gummadi commented on HADOOP-5194:

When setsid is used when creating a process(HADOOP-2721 does this), on windows, cygwin, process.waitFor()
seem to be not working(not waiting for the process completion) if the process is not using
input stream and error stream. Can someone think of a solution/workaround for this ?

> DiskErrorException in TaskTracker when running a job
> ----------------------------------------------------
>                 Key: HADOOP-5194
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5194
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>         Environment: Hudson (Solaris?), Windows, Cygwin
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Ravi Gummadi
>            Priority: Blocker
>             Fix For: 0.21.0
>  In particular, this can be reproduced in Windows by running a hadoop example such as
> {noformat}
> org.apache.hadoop.util.DiskChecker$DiskErrorException: Could not find taskTracker/pids/attempt_200902021632_0001_m_000002_0
in any of the configured local directories
> 	at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathToRead(LocalDirAllocator.java:381)
> 	at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathToRead(LocalDirAllocator.java:138)
> 	at org.apache.hadoop.mapred.TaskTracker.getPidFilePath(TaskTracker.java:430)
> 	at org.apache.hadoop.mapred.TaskTracker.removePidFile(TaskTracker.java:440)
> 	at org.apache.hadoop.mapred.JvmManager$JvmManagerForType$JvmRunner.runChild(JvmManager.java:370)
> 	at org.apache.hadoop.mapred.JvmManager$JvmManagerForType$JvmRunner.run(JvmManager.java:338)
> {noformat}
> (Have changed TaskTracker.java to print out the trace.)

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