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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1054) Remove unnecessary sleep after failure in nextBlockOutputStream
Date Tue, 06 Apr 2010 00:58:27 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1054?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12853627#action_12853627

Hadoop QA commented on HDFS-1054:

-1 overall.  Here are the results of testing the latest attachment 
  against trunk revision 930967.

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

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    +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

    +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/Hdfs-Patch-h5.grid.sp2.yahoo.net/298/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-h5.grid.sp2.yahoo.net/298/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-h5.grid.sp2.yahoo.net/298/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-h5.grid.sp2.yahoo.net/298/console

This message is automatically generated.

> Remove unnecessary sleep after failure in nextBlockOutputStream
> ---------------------------------------------------------------
>                 Key: HDFS-1054
>                 URL: https://issues.apache.org/jira/browse/HDFS-1054
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs client
>    Affects Versions: 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-1054.txt
> If DFSOutputStream fails to create a pipeline, it currently sleeps 6 seconds before retrying.
I don't see a great reason to wait at all, much less 6 seconds (especially now that HDFS-630
ensures that a retry won't go back to the bad node). We should at least make it configurable,
and perhaps something like backoff makes some sense.

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