[jira] [Commented] (HBASE-15931) Add log for long-running tasks in AsyncProcess

["Sean Busbey (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-15931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16606282#comment-16606282 ] 

Sean Busbey commented on HBASE-15931:
-------------------------------------

(Added 1.2.7 version since that's the one that got the addendum. leaving 1.2.3 because it got the original fix)

> Add log for long-running tasks in AsyncProcess
> ----------------------------------------------
>
>                 Key: HBASE-15931
>                 URL: https://issues.apache.org/jira/browse/HBASE-15931
>             Project: HBase
>          Issue Type: Improvement
>          Components: Operability
>            Reporter: Yu Li
>            Assignee: Yu Li
>            Priority: Critical
>             Fix For: 1.3.0, 0.98.20, 1.1.6, 1.2.3, 2.0.0, 1.2.7
>
>         Attachments: HBASE-15931.patch
>
>
> Currently if there's any long-tail tasks in a multi-action request like triggered by {{BufferedMutatorImpl#backgroundFlushCommits}}, we could see logging message like below
> {noformat}
> 2016-05-31 09:36:55,461 INFO [Thread-16] org.apache.hadoop.hbase.client.AsyncProcess: #28, waiting for some tasks to finish. Expected max=0, tasksInProgress=1
> {noformat}
> but there's no way to know detail of this long-tail, such as which table/region it's accessing. This JIRA aims at adding such log for easier debugging.



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