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Posted to common-issues@hadoop.apache.org by "Hemanth Yamijala (JIRA)" <ji...@apache.org> on 2012/09/05 08:01:08 UTC

[jira] [Updated] (HADOOP-8765) LocalDirAllocator.ifExists API is broken and unused

     [ https://issues.apache.org/jira/browse/HADOOP-8765?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hemanth Yamijala updated HADOOP-8765:
-------------------------------------

    Attachment: HADOOP-8765.patch

Attached patch removes the ifExists API and AllocatorPerContext.ifExists API as well. Could someone please review ?
                
> LocalDirAllocator.ifExists API is broken and unused
> ---------------------------------------------------
>
>                 Key: HADOOP-8765
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8765
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>            Reporter: Hemanth Yamijala
>            Assignee: Hemanth Yamijala
>            Priority: Minor
>         Attachments: HADOOP-8765.patch
>
>
> LocalDirAllocator.ifExists calls AllocatorPerContext.ifExists, which accesses the localDirsPath variable that is uninitialised. Hence, any code that uses this API is likely to fail with a NullPointerException.
> However, this API is currently not used anywhere else in trunk. The earlier usage was in IsolationRunner, that has since been removed via MAPREDUCE-2606.
> Hence, we could remove this API for trunk, and if required, fix it for the 1.x branch.

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