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HBase, mail # dev - HBASE-5898 & 0.92.2


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Re: HBASE-5898 & 0.92.2
Ted Yu 2012-12-11, 20:10
Shrijeet:
The attachment didn't go through.

Can you use pastebin ?

Thanks

On Tue, Dec 11, 2012 at 12:05 PM, Shrijeet Paliwal
<[EMAIL PROTECTED]>wrote:

> Hello All,
>
> If our read of https://issues.apache.org/jira/browse/HBASE-5898 is
> correct it talks about three issues:
>
> #1 Contention on a lock causing bad performance
> #2 HDFS slowness causing IPC handlers blocked for large times.
> #3 A mysterious bug which causes what looks like a deadlock
>
> In out environment[1] we are seeing #3 (ish) signals. Attached is the
> stack trace. One of our region server got blocked (almost all of IPC
> handlers) for 11 hours, so it can not be #1 OR #2.
>
> We have not back ported the patch yet so cant say if it fixes the issue or
> not. Also it is difficult to reproduce.  There is a rumor that a program to
> reproduce this issue exist, does it?
>
> Eager to hear thoughts.
>
> [1] HBase version 0.92.2 , Hadoop version CDH3u0
> -Shrijeet
>