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From "Yongzhi Chen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-15572) Improve the response time for query canceling when it happens during acquiring locks
Date Wed, 18 Jan 2017 14:33:26 GMT

     [ https://issues.apache.org/jira/browse/HIVE-15572?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yongzhi Chen updated HIVE-15572:
--------------------------------
    Status: Open  (was: Patch Available)

> Improve the response time for query canceling when it happens during acquiring locks
> ------------------------------------------------------------------------------------
>
>                 Key: HIVE-15572
>                 URL: https://issues.apache.org/jira/browse/HIVE-15572
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Yongzhi Chen
>            Assignee: Yongzhi Chen
>         Attachments: HIVE-15572.1.patch, HIVE-15572.2.patch
>
>
> When query canceling command sent during Hive Acquire locks (from zookeeper), hive will
finish acquiring all the locks and release them. As it is shown in the following log:
> It took 165 s to finish acquire the lock,then spend 81s to release them.
> We can improve the performance by not acquiring any more locks and releasing held locks
when the query canceling command is received. 
> {noformat}
> Background-Pool: Thread-224]: <PERFLOG method=TimeToSubmit from=org.apache.hadoop.hive.ql.Driver>
> 2017-01-03 10:50:35,413 INFO  org.apache.hadoop.hive.ql.log.PerfLogger: [HiveServer2-Background-Pool:
Thread-224]: <PERFLOG method=acquireReadWriteLocks from=org.apache.hadoop.hive.ql.Driver>
> 2017-01-03 10:51:00,671 INFO  org.apache.hadoop.hive.ql.log.PerfLogger: [HiveServer2-Background-Pool:
Thread-218]: </PERFLOG method=acquireReadWriteLocks start=1483469295080 end=1483469460671
duration=165591 from=org.apache.hadoop.hive.ql.Driver>
> 2017-01-03 10:51:00,672 INFO  org.apache.hadoop.hive.ql.log.PerfLogger: [HiveServer2-Background-Pool:
Thread-218]: <PERFLOG method=Driver.execute from=org.apache.hadoop.hive.ql.Driver>
> 2017-01-03 10:51:00,672 ERROR org.apache.hadoop.hive.ql.Driver: [HiveServer2-Background-Pool:
Thread-218]: FAILED: query select count(*) from manyparttbl has been cancelled
> 2017-01-03 10:51:00,673 INFO  org.apache.hadoop.hive.ql.log.PerfLogger: [HiveServer2-Background-Pool:
Thread-218]: <PERFLOG method=releaseLocks from=org.apache.hadoop.hive.ql.Driver>
> 2017-01-03 10:51:40,755 INFO  org.apache.hadoop.hive.ql.log.PerfLogger: [HiveServer2-Background-Pool:
Thread-215]: </PERFLOG method=releaseLocks start=1483469419487 end=1483469500755 duration=81268
from=org.apache.hadoop.hive.ql.Driver>
> {noformat}



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