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From "Vinod K V (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5349) When the size required for a path is -1, LocalDirAllocator.getLocalPathForWrite fails with a DiskCheckerException when the disk it selects is bad.
Date Fri, 27 Feb 2009 12:43:12 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12677349#action_12677349
] 

Vinod K V commented on HADOOP-5349:
-----------------------------------

When the size required is unknown, LocalDirAllocator selects one target disk in a round-robin
fashion. Before returning this path, it tries to create the path. If the selected disk turns
about to be bad, then LocalDirAllocator.getLocalPathForWrite fails with a DiskCheckerException.
The fix for this is to make getLocalPathWrite to try other disks till it finds one, similar
to the case when required size of the path is known.

> When the size required for a path is -1, LocalDirAllocator.getLocalPathForWrite fails
with a DiskCheckerException when the disk it selects is bad.
> --------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-5349
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5349
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.20.0
>            Reporter: Vinod K V
>


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