[jira] [Created] (YARN-6738) LevelDBCacheTimelineStore should reuse ObjectMapper instances

["Zoltan Haindrich (JIRA)" <ji...@apache.org>]

Zoltan Haindrich created YARN-6738:
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             Summary: 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


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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