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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3778) seek(long) in DFSInputStream should catch socket exception for retry later
Date Tue, 22 Jul 2008 20:57:31 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12615787#action_12615787
] 

Hadoop QA commented on HADOOP-3778:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12386648/HADOOP-3778.patch
  against trunk revision 678845.

    +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 tests are needed for 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
warnings.

    -1 core tests.  The patch failed core unit tests.

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

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2922/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2922/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2922/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2922/console

This message is automatically generated.

> seek(long) in DFSInputStream should catch socket exception for retry later
> --------------------------------------------------------------------------
>
>                 Key: HADOOP-3778
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3778
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.16.0
>            Reporter: LN
>            Assignee: LN
>            Priority: Minor
>             Fix For: 0.19.0
>
>         Attachments: HADOOP-3778.patch, HADOOP-3778.patch, HADOOP-3778.patch
>
>
> HADOOP-2346 introduced data read/write timeout. when data stream borken, DFSClient will
retry in read/write methods, but no such mechanism found when seek(long) calling blockReader.skip(diff)
(DFSClient.java #1582), will let IOException throw to application.  i met NPE when using MapFile
in hbase.
> i'm supposing in the seek(long) method, let done be 'false' will causing retry (via 'blockEnd
= -1'), a patch will attached later for review.

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