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From "Zoltan Haindrich (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-6738) LevelDBCacheTimelineStore should reuse ObjectMapper instances
Date Fri, 23 Jun 2017 13:36:06 GMT
Zoltan Haindrich created YARN-6738:
--------------------------------------

             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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