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Date: Thu, 6 Jan 2011 17:13:45 -0500 (EST)
From: "Hadoop QA (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Subject: [jira] Commented: (HDFS-1497) Write pipeline sequence numbers
 should be sequential with no skips or duplicates
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    [ https://issues.apache.org/jira/browse/HDFS-1497?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12978535#action_12978535 ] 

Hadoop QA commented on HDFS-1497:
---------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12467659/hdfs-1497.txt
  against trunk revision 1056009.

    +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 patch appears to cause tar ant target to fail.

    -1 findbugs.  The patch appears to cause Findbugs (version 1.3.9) to fail.

    +1 release audit.  The applied patch does not increase the total number of release audit warnings.

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


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

    -1 system test framework.  The patch failed system test framework compile.

Test results: https://hudson.apache.org/hudson/job/PreCommit-HDFS-Build/87//testReport/
Console output: https://hudson.apache.org/hudson/job/PreCommit-HDFS-Build/87//console

This message is automatically generated.

> Write pipeline sequence numbers should be sequential with no skips or duplicates
> --------------------------------------------------------------------------------
>
>                 Key: HDFS-1497
>                 URL: https://issues.apache.org/jira/browse/HDFS-1497
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs client
>    Affects Versions: 0.20-append, 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-1497.txt, hdfs-1497.txt, hdfs-1497.txt, hdfs-1497.txt
>
>
> In HDFS-895 we discovered that multiple hflush() calls in a row without intervening writes could cause a skip in sequence number. This doesn't seem to have any direct consequences, but we should maintain and assert the invariant that sequence numbers have no gaps or duplicates.

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