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HBase >> mail # dev >> HBASE-5898 & 0.92.2


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Re: HBASE-5898 & 0.92.2
Done https://gist.github.com/4261746
On Tue, Dec 11, 2012 at 12:10 PM, Ted Yu <[EMAIL PROTECTED]> wrote:

> 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
> >
>