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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7603) The background replication queue initialization may not let others run
Date Mon, 12 Jan 2015 23:34:35 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7603?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14274400#comment-14274400
] 

Hadoop QA commented on HDFS-7603:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12691738/HDFS-7603.patch
  against trunk revision b78b4a1.

    {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}.  There were no new javadoc 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
2.0.3) warnings.

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

    {color:red}-1 core tests{color}.  The following test timeouts occurred in hadoop-hdfs-project/hadoop-hdfs:

org.apache.hadoop.hdfs.qjournal.client.TestQJMWithFaults

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/9188//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/9188//console

This message is automatically generated.

> The background replication queue initialization may not let others run
> ----------------------------------------------------------------------
>
>                 Key: HDFS-7603
>                 URL: https://issues.apache.org/jira/browse/HDFS-7603
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: rolling upgrades
>            Reporter: Kihwal Lee
>            Assignee: Kihwal Lee
>            Priority: Critical
>         Attachments: HDFS-7603.patch
>
>
> The background replication queue initialization processes configured number of blocks
at a time and releases the namesystem write lock.  This was to let namenode start serving
right after a standby to active transition or leaving safe mode.  However, this does not allow
others to run much if the lock fairness is set to "unfair" for the higher throughput.
> I propose adding a delay between unlocking and locking in the async repl queue init thread.



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