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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-265) Abort tasktracker if it can not write to its local directories
Date Thu, 01 Jun 2006 00:14:32 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-265?page=all ]

Hairong Kuang updated HADOOP-265:

    Attachment: mapred_disk.patch

In this patch, if a task tracker finds out that any of its local directories becomes not readable
or writable, it logs the error. If all of its local directories are not readable/writable,
it reports the problem to its job tracker and then aborts. When the job tracker receives the
error report, it logs the error. 

A task tracker detects disk problem at startup time and before it starts a new task. A task
tracker will not start if all its local directories are not readable or writable. 

> Abort tasktracker if it can not write to its local directories
> --------------------------------------------------------------
>          Key: HADOOP-265
>          URL: http://issues.apache.org/jira/browse/HADOOP-265
>      Project: Hadoop
>         Type: Bug

>   Components: mapred
>     Versions: 0.3
>     Reporter: Hairong Kuang
>     Assignee: Hairong Kuang
>      Fix For: 0.3
>  Attachments: mapred_disk.patch
> Currently if a task tracker is not able to write to any of its local directories, it
continues to run and all the tasks assigned to it fail.
> A task tracker should not start upif it has a problem reading/writing any of its local
directories. It should abort if it gets the problem at run time.

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