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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3020) Auto-logSync based on edit log buffer size broken
Date Thu, 01 Mar 2012 12:42:02 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3020?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13219994#comment-13219994
] 

Hudson commented on HDFS-3020:
------------------------------

Integrated in Hadoop-Hdfs-trunk #971 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/971/])
    HDFS-3020. Fix editlog to automatically sync when buffer is full. Contributed by Todd
Lipcon. (Revision 1295239)

     Result = SUCCESS
todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1295239
Files : 
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/EditsDoubleBuffer.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLog.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestEditLog.java

                
> Auto-logSync based on edit log buffer size broken
> -------------------------------------------------
>
>                 Key: HDFS-3020
>                 URL: https://issues.apache.org/jira/browse/HDFS-3020
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.22.0, 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Critical
>             Fix For: 0.24.0, 0.23.3
>
>         Attachments: hdfs-3020.txt, hdfs-3020.txt, hdfs-3020.txt
>
>
> HDFS-1112 added a feature whereby the edit log automatically calls logSync() if the buffered
data crosses a threshold. However, the code checks {{bufReady.size()}} rather than {{bufCurrent.size()}}
-- which is incorrect since the writes themselves go into {{bufCurrent}}.

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