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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6640) FileSystem.get() does RPC retries within a static synchronized block
Date Thu, 01 Apr 2010 09:26:27 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12852301#action_12852301
] 

Hadoop QA commented on HADOOP-6640:
-----------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12440376/getFS.patch
  against trunk revision 927979.

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

    +1 tests included.  The patch appears to include 3 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 release audit.  The applied patch does not increase the total number of release audit
warnings.

    +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-h4.grid.sp2.yahoo.net/438/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h4.grid.sp2.yahoo.net/438/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h4.grid.sp2.yahoo.net/438/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h4.grid.sp2.yahoo.net/438/console

This message is automatically generated.

> FileSystem.get() does RPC retries within a static synchronized block
> --------------------------------------------------------------------
>
>                 Key: HADOOP-6640
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6640
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>         Environment: all
>            Reporter: Alejandro Abdelnur
>            Assignee: Hairong Kuang
>            Priority: Critical
>         Attachments: getFS.patch
>
>
> If using FileSystem.get() in a multithreaded environment, and one get() locks because
the NN URI is too slow or not responding and retries are in progress, all other get() (for
the diffferent users, NN) are blocked.
> the synchronized block in in the static instance of Cache inner class.

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