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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4399) fuse-dfs per FD context is not thread safe and can cause segfaults and corruptions
Date Fri, 17 Oct 2008 03:06:46 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12640419#action_12640419

Hadoop QA commented on HADOOP-4399:

+1 overall.  Here are the results of testing the latest attachment 
  against trunk revision 705420.

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 18 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs warnings.

    +1 Eclipse classpath. The patch retains Eclipse classpath integrity.

    +1 core tests.  The patch passed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3479/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3479/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3479/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3479/console

This message is automatically generated.

>  fuse-dfs per FD context is not thread safe and can cause segfaults and corruptions
> -----------------------------------------------------------------------------------
>                 Key: HADOOP-4399
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4399
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: contrib/fuse-dfs
>    Affects Versions: 0.19.0
>            Reporter: Pete Wyckoff
>            Assignee: Pete Wyckoff
>            Priority: Blocker
>             Fix For: 0.19.0
>         Attachments: HADOOP-4399.1.txt, HADOOP-4399.2.txt, HADOOP-4399.3.txt, TEST-TestFuseDFS.txt,
> for reads, optimal solution would be to have a per thread (per FD) context - including
the buffer. Otherwise, protect the FD context with a mutex as in hadoop-4397 and hadoop-4398.
> for writes, should just protect the context with a mutex as in hadoop-4398.

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