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From "Chris Douglas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3204) LocalFSMerger needs to catch throwable
Date Tue, 08 Apr 2008 20:59:24 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12586959#action_12586959

Chris Douglas commented on HADOOP-3204:

bq. All the operations done in LocalFSMerger throw IOException and hence LocalFSMerger expects
IOException. I think a better approach would be to make FSError extend IOException or something
like that. Fixing the code to catch FSerror when IOException is expected is incorrect.

I disagree. Per HADOOP-3154 and HADOOP-3166, it is critical that any worker threads whose
death could result in data loss are handled by (or kill) the main thread, including (perhaps
especially) Errors. Besides, FSError cannot extend both Error and IOException.

> LocalFSMerger needs to catch throwable
> --------------------------------------
>                 Key: HADOOP-3204
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3204
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>         Environment: Revision: 645751
>            Reporter: Koji Noguchi
> I haven't used trunk(0.17) so I don't know what would happen when FSError is thrown within
LocalFSMerger thread.
> Does it have the same problem as HADOOP-3154?  

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