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From Ted Yu <yuzhih...@gmail.com>
Subject Re: Region server not accept connections intermittently
Date Thu, 10 Jul 2014 09:11:10 GMT
I noticed the blockSeek() call in HFileReaderV2. 

Did you take only one dump during the 20 minute hang ?


On Jul 10, 2014, at 1:54 AM, Rural Hunter <ruralhunter@gmail.com> wrote:

> I got the dump of the problematic rs from web ui: http://pastebin.com/4hfhkDUw
> output of "top -H -p <PID>": http://pastebin.com/LtzkScYY
> I also got the output of jstack but I believe it's already in the dump so I do not paste
it again. This time the hang lasted about 20 minutes.
> 于 2014/7/9 12:48, Esteban Gutierrez 写道:
>> Hi Rural,
>> Thats interesting. Since you are passing
>> hbase.zookeeper.property.maxClientCnxns does it means that ZK is managed by
>> HBase? If you experience the issue again, can you try to obtain a jstack
>> (as the user that started the hbase process or try from the RS UI if
>> responsive rs:port/dump) as Ted suggested? the output of "top -H -p <PID>"
>> might be useful too where <PID> is the pid of the RS. If you have some
>> metrics monitoring it would be interesting to see how callQueueLength and
>> the blocked threads change over time.
>> cheers,
>> esteban.
>> --
>> Cloudera, Inc.

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