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HBase, mail # dev - HBASE-5898 & 0.92.2


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Re: HBASE-5898 & 0.92.2
Jean-Daniel Cryans 2012-12-11, 20:32
This really looks like the issue we got that prompted applying HBASE-5898.

Never heard about the rumor.

If you can isolate the region that exhibits the issue, put it on a
region server by itself and patch that region server to see if it
fixes the issue.

Also, can you confirm that you are running java 1.6 u16?

Thx,

J-D

On Tue, Dec 11, 2012 at 12:14 PM, Shrijeet Paliwal
<[EMAIL PROTECTED]> wrote:
> 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
>> >
>>