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https://issues.apache.org/jira/browse/YARN-6738?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16065610#comment-16065610
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Hudson commented on YARN-6738:
------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #11934 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/11934/])
YARN-6738. LevelDBCacheTimelineStore should reuse ObjectMapper (jlowe: rev
63ce1593c5b78eb172773e7498d9c321debe81e8)
* (edit)
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timeline-pluginstorage/src/main/java/org/apache/hadoop/yarn/server/timeline/LevelDBCacheTimelineStore.java
> LevelDBCacheTimelineStore should reuse ObjectMapper instances
> -------------------------------------------------------------
>
> Key: YARN-6738
> URL: https://issues.apache.org/jira/browse/YARN-6738
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: timelineserver
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Fix For: 2.9.0, 3.0.0-alpha4, 2.8.2
>
> Attachments: Screen Shot 2017-06-23 at 2.43.06 PM.png,
> YARN-6738.1.patch, YARN-6738.2.patch
>
>
> Using TezUI sometimes times out...and the cause of it was that the query was
> quite large; and the leveldb handler seems like recreates the
> {{ObjectMapper}} for every read - this is unfortunate; since the ObjectMapper
> have to rescan the class annotations which may take some time.
> Keeping the objectmapper reduces the ATS call time from 17 seconds to 3
> seconds for me...which was enough to get my tez-ui working again :)
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