[jira] [Commented] (MAPREDUCE-5987) native-task: Unit test TestGlibCBug fails on ubuntu

["Todd Lipcon (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5987?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14072988#comment-14072988 ] 

Todd Lipcon commented on MAPREDUCE-5987:
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Can you give some more context on the bug this is referring to? I found the description in the RHEL release notes:

{quote}
Prior to this update, the internal FILE offset was set incorrectly in wide character streams. As a consequence, the offset returned by ftell was incorrect. In some cases, this could result in over-writing data. This update modifies the ftell code to correctly set the internal FILE offset field for wide characters. Now, ftell and fseek handle the offset as expected.
{quote}

but best I can tell, the nativetask code never calls ftell() or fseek(). Running 'nm' on the libnativetask.so confirms that they aren't linked in.

> native-task: Unit test TestGlibCBug fails on ubuntu
> ---------------------------------------------------
>
>                 Key: MAPREDUCE-5987
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5987
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: task
>            Reporter: Sean Zhong
>            Assignee: Sean Zhong
>            Priority: Minor
>
> On  ubuntu12, glibc: 2.15-0ubuntu10.3, UT TestGlibCBug fails
> [ RUN      ] IFile.TestGlibCBug
> 14/07/21 15:55:30 INFO TestGlibCBug ./testData/testGlibCBugSpill.out
> /home/decster/projects/hadoop-trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-nativetask/src/main/native/test/TestIFile.cc:186: Failure
> Value of: realKey
>   Actual: 1127504685
> Expected: expect[index]
> Which is: 4102672832
> [  FAILED  ] IFile.TestGlibCBug (0 ms)
> [----------] 2 tests from IFile (240 ms total)



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