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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5346) Replication queues should not be initialized in the middle of IBR processing.
Date Tue, 15 Oct 2013 06:36:42 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13794933#comment-13794933
] 

Hadoop QA commented on HDFS-5346:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12608429/HDFS-5346.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  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.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-hdfs-project/hadoop-hdfs.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/5190//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/5190//console

This message is automatically generated.

> Replication queues should not be initialized in the middle of IBR processing.
> -----------------------------------------------------------------------------
>
>                 Key: HDFS-5346
>                 URL: https://issues.apache.org/jira/browse/HDFS-5346
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode, performance
>    Affects Versions: 0.23.9, 2.3.0
>            Reporter: Kihwal Lee
>            Assignee: Ravi Prakash
>             Fix For: 2.3.0, 0.23.10
>
>         Attachments: HDFS-5346.patch
>
>
> When initial block reports are being processed, checkMode() is called from incrementSafeBlockCount().
This causes the replication queues to be initialized in the middle of processing a block report
in the IBR processing mode. If there are many block reports waiting to be processed, SafeModeMonitor
won't be able to make name node leave the safe mode soon. It appears that the block report
processing speed degrades considerably during this time. 



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