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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-15677) Ambari needs to set HDFS GC settings correctly
Date Sun, 03 Apr 2016 15:07:25 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-15677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15223349#comment-15223349
] 

Hadoop QA commented on AMBARI-15677:
------------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12796676/AMBARI-15677.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 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 ambari-server.

Test results: https://builds.apache.org/job/Ambari-trunk-test-patch/6161//testReport/
Console output: https://builds.apache.org/job/Ambari-trunk-test-patch/6161//console

This message is automatically generated.

> Ambari needs to set HDFS GC settings correctly
> ----------------------------------------------
>
>                 Key: AMBARI-15677
>                 URL: https://issues.apache.org/jira/browse/AMBARI-15677
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server
>    Affects Versions: 2.2.2
>            Reporter: Vitaly Brodetskyi
>            Assignee: Vitaly Brodetskyi
>            Priority: Critical
>             Fix For: 2.2.2
>
>         Attachments: AMBARI-15677.patch
>
>
> We need to make sure the Namenode CMS GC settings are correct.
> Ambari does not currently set -XX:CMSInitiatingOccupancyFraction=70 or -XX:+UseCMSInitiatingOccupancyOnly.
The NewSize needs also some tweaking: it should be 1/8th to 1/10th of the namenode heap size
in general, but it looks like we would cap at 8 gb like here (this NN has 112 GB heap).



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