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From "Brahma Reddy Battula (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5368) memory leak at timeline server
Date Wed, 02 Nov 2016 14:11:58 GMT

    [ https://issues.apache.org/jira/browse/YARN-5368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15629088#comment-15629088

Brahma Reddy Battula commented on YARN-5368:

[~jlowe]  and [~jeagles] thanks for your inputs.

bq. Do you have gc logging enabled for the nodemanager JVM? It would be interesting to know
if it was trying to run one or more GC cycles during that time. If it wasn't GC cycles then
I'm not sure how increased off-heap memory would directly contribute to slower resource localization
unless the machine was near or at the point where it started swapping.

GC looks normal,and after applying the YARN-3491,ResourceLocalization is also normal. But
for RES memory increase , need to try with [~jeagles] options. 

But I doubt {{db.compactRange(null, null);}}, file number is not decreasing after this. if
we close and open the db then files are got deleted( not from the memory).

> memory leak at timeline server
> ------------------------------
>                 Key: YARN-5368
>                 URL: https://issues.apache.org/jira/browse/YARN-5368
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: timelineserver
>    Affects Versions: 2.7.1
>         Environment: HDP2.4
> CentOS 6.7
> jdk1.8.0_72
>            Reporter: Wataru Yukawa
> memory usage of timeline server machine increases gradually.
> https://gyazo.com/952dad96c77ae053bae2e4d8c8ab0572
> please check since April.
> According to my investigation, timeline server used about 25GB.
> top command result
> {code}
> 90577 yarn      20   0 28.4g  25g  12m S  0.0 40.1   5162:53 /usr/java/jdk1.8.0_72/bin/java
-Dproc_timelineserver -Xmx1024m -Dhdp.version= -Dhadoop.log.dir=/var/log/hadoop-yarn/yarn
-Dyarn.log.dir=/var/log/hadoop-yarn/yarn ...
> {code}
> ps command result
> {code}
> $ ps ww 90577
>  90577 ?        Sl   5162:53 /usr/java/jdk1.8.0_72/bin/java -Dproc_timelineserver -Xmx1024m
-Dhdp.version= -Dhadoop.log.dir=/var/log/hadoop-yarn/yarn -Dyarn.log.dir=/var/log/hadoop-yarn/yarn
-Dhadoop.log.file=yarn-yarn-timelineserver-myhost.log -Dyarn.log.file=yarn-yarn-timelineserver-myhost.log
-Dyarn.home.dir= -Dyarn.id.str=yarn -Dhadoop.root.logger=INFO,EWMA,RFA -Dyarn.root.logger=INFO,EWMA,RFA
-Dyarn.policy.file=hadoop-policy.xml -Djava.io.tmpdir=/var/lib/ambari-agent/tmp/hadoop_java_io_tmpdir
-Dhadoop.log.dir=/var/log/hadoop-yarn/yarn -Dyarn.log.dir=/var/log/hadoop-yarn/yarn -Dhadoop.log.file=yarn-yarn-timelineserver-myhost.log
-Dyarn.log.file=yarn-yarn-timelineserver-myhost.log -Dyarn.home.dir=/usr/hdp/current/hadoop-yarn-timelineserver
-Dhadoop.home.dir=/usr/hdp/ -Dhadoop.root.logger=INFO,EWMA,RFA -Dyarn.root.logger=INFO,EWMA,RFA
-classpath /usr/hdp/*:/usr/hdp/*:/usr/hdp/*:/usr/hdp/*:/usr/hdp/*:/usr/hdp/*:/usr/hdp/*:/usr/hdp/*::/usr/hdp/*:/usr/hdp/*:/usr/hdp/*:/usr/hdp/*:/usr/hdp/*:/usr/hdp/current/hadoop-yarn-timelineserver/lib/*:/usr/hdp/
> {code}
> Alghough I set -Xmx1024m, actual memory usage is 25GB.
> After I restart timeline server, memory usage of timeline server machine decreases.
> https://gyazo.com/130600c17a7d41df8606727a859ae7e3
> Now timelineserver uses less than 1GB memory.
> top command result
> {code}
>  6163 yarn      20   0 3959m 783m  46m S  0.3  1.2   3:37.60 /usr/java/jdk1.8.0_72/bin/java
-Dproc_timelineserver -Xmx1024m -Dhdp.version= ...
> {code}
> I suspect memory leak at timeline server.

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