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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1497) Write pipeline sequence numbers should be sequential with no skips or duplicates
Date Sat, 19 Feb 2011 14:38:38 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1497?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12996782#comment-12996782

Hadoop QA commented on HDFS-1497:

-1 overall.  Here are the results of testing the latest attachment 
  against trunk revision 1072023.

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

    +1 tests included.  The patch appears to include 3 new or modified tests.

    -1 patch.  The patch command could not apply the patch.

Console output: https://hudson.apache.org/hudson/job/PreCommit-HDFS-Build/183//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, 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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