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From "Joydeep Sen Sarma (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-1580) cleanup ExecDriver.progress
Date Sat, 21 Aug 2010 11:40:16 GMT
cleanup ExecDriver.progress

                 Key: HIVE-1580
                 URL: https://issues.apache.org/jira/browse/HIVE-1580
             Project: Hadoop Hive
          Issue Type: Bug
          Components: Query Processor
            Reporter: Joydeep Sen Sarma
            Assignee: Joydeep Sen Sarma

a few problems:

- if a job is retired - then counters cannot be obtained and a stack trace is printed out
(from history code). this confuses users
- too many calls to getCounters. after a job has been detected to be finished - there are
quite a few more calls to get the job status and the counters. we need to figure out a way
to curtail this - in busy clusters the gap between the job getting finished and the hive client
noticing is very perceptible and impacts user experience.

calls to getCounters are very expensive in 0.20 as they grab a jobtracker global lock (something
we have fixed internally at FB)

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