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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7213) processIncrementalBlockReport performance degradation
Date Thu, 09 Oct 2014 01:18:34 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14164539#comment-14164539
] 

Hadoop QA commented on HDFS-7213:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12673726/HDFS-7213.1412806496.txt
  against trunk revision 2217e2f.

    {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:red}-1 release audit{color}.  The applied patch generated 1 release audit warnings.

    {color:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-hdfs-project/hadoop-hdfs:

                  org.apache.hadoop.hdfs.server.namenode.ha.TestDNFencingWithReplication

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

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/8358//testReport/
Release audit warnings: https://builds.apache.org/job/PreCommit-HDFS-Build/8358//artifact/patchprocess/patchReleaseAuditProblems.txt
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/8358//console

This message is automatically generated.

> processIncrementalBlockReport performance degradation
> -----------------------------------------------------
>
>                 Key: HDFS-7213
>                 URL: https://issues.apache.org/jira/browse/HDFS-7213
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 2.4.0
>            Reporter: Daryn Sharp
>            Assignee: Eric Payne
>            Priority: Critical
>         Attachments: HDFS-7213.1412804753, HDFS-7213.1412806496.txt
>
>
> {{BlockManager#processIncrementalBlockReport}} has a debug line that is missing a {{isDebugEnabled}}
check.  The write lock is being held.  Coupled with the increase in incremental block reports
from receiving blocks, under heavy load this log line noticeably degrades performance.



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