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https://issues.apache.org/jira/browse/HBASE-15931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15310786#comment-15310786
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stack commented on HBASE-15931:
-------------------------------
+1
> 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
> Reporter: Yu Li
> Assignee: Yu Li
> 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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