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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Requests stuck on production cluster
Date Fri, 01 Apr 2011 03:58:36 GMT
What's going on in the logs?  CPU?  i/o?

On Thu, Mar 31, 2011 at 4:20 AM, Or Yanay <or@peer39.com> wrote:

> Hi all,
>
>
>
> My production cluster reads got stuck.
>
> The ring gives:
>
>
>
> Address         Status State   Load            Owns
> Token
>
>                                                        146231632500721020374621781629360107476
>
>
> 10.39.21.7      Up     Normal  118.86 GB       18.15%
> 6968792681466807915334918525105891681
>
> 10.39.21.2      Up     Normal  170.37 GB       33.20%
> 63458945745812644657648926377562798568
>
> 10.39.21.4      Up     Normal  129.49 GB       2.09%
> 67020233994527804731783987345291668992
>
> 10.39.21.3      Up     Normal  118.57 GB       31.26%
> 120208618942813734646032022699594259441
>
> 10.39.21.6      Up     Normal  171.03 GB       15.29%
> 146231632500721020374621781629360107476
>
>
>
> The 2% bit struck me as odd, so I ran tpstats on 10.39.21.4 and got:
>
> Pool Name
>
> Active
>
> Pending
>
> Completed
>
> ReadStage
>
> 0
>
> 0
>
> 143370
>
> *RequestResponseStage*
>
> *8*
>
> *1231283*
>
> *414467*
>
> MutationStage
>
> 0
>
> 0
>
> 1772203
>
> ReadRepair
>
> 0
>
> 0
>
> 7678
>
> GossipStage
>
> 0
>
> 0
>
> 204797
>
> AntiEntropyStage
>
> 0
>
> 0
>
> 0
>
> MigrationStage
>
> 0
>
> 0
>
> 0
>
> MemtablePostFlusher
>
> 0
>
> 0
>
> 48
>
> StreamStage
>
> 0
>
> 0
>
> 0
>
> FlushWriter
>
> 0
>
> 0
>
> 48
>
> FILEUTILS-DELETE-POOL
>
> 0
>
> 0
>
> 46
>
> MiscStage
>
> 0
>
> 0
>
> 0
>
> FlushSorter
>
> 0
>
> 0
>
> 0
>
> InternalResponseStage
>
> 0
>
> 0
>
> 0
>
> HintedHandoff
>
> 0
>
> 0
>
> 6
>
>
>
> So… something got terribly wrong.
>
> Can anyone suggest what should do next to fix this?
>
>
>
> Thanks.
>
> -Orr
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com

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