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From: "zhangduo (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-13219) Issues with PE tool in trunk
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    [ https://issues.apache.org/jira/browse/HBASE-13219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14360502#comment-14360502 ] 

zhangduo commented on HBASE-13219:
----------------------------------

{noformat}
grep -c "^\"" t1
2067
grep -c "^\"hconnection-" t1
1917
{noformat}

Seems there are 2067 threads and 1917 of them are something like "hconnection-0x4f049d87-shared--pool16-t80". Maybe this is the problem.
I do not know where we create a thread with this pattern of name, need to dig into the code. Is anyone familiar with this part of code?
Thanks.

> Issues with PE tool in trunk
> ----------------------------
>
>                 Key: HBASE-13219
>                 URL: https://issues.apache.org/jira/browse/HBASE-13219
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 2.0.0
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>         Attachments: t1
>
>
> -> PE tool tries to create the TEstTable and waits for it to be enabled and just hangs there 
> Previously this was not happening and the PE tool used to run fine after the table creation.
> -> When we try to scan with 25 threads the PE tool fails after some time saying Unable to create native threads.
> I lost the Stack trace now. But I could get it easily.  It happens here 
> {code}
>   public void submit(RetryingCallable<V> task, int callTimeout, int id) {
>     QueueingFuture<V> newFuture = new QueueingFuture<V>(task, callTimeout);
>     executor.execute(Trace.wrap(newFuture));
>     tasks[id] = newFuture;
>   }
> {code}
> in ResultBoundedCompletionService. This is also new.  Previously it used to work with 25 threads without any issues. 



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