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From Jean-Daniel Cryans <jdcry...@apache.org>
Subject Re: RetriesExhaustedException
Date Mon, 08 Mar 2010 03:55:09 GMT
Sounds like a bug? Can we see some logs from that region server and
see if we can fix it?

J-D

2010/3/7  <y_823910@tsmc.com>:
> Hi,
>
> I found one of my region server being like a plant(just breath and can't do
> anything).
> HBase still get its heartbeats, actually it is a dead node.
> Any ways we can prevent from it?
> Thanks
>
>
> Fleming Chiu(邱宏明)
> 707-6128
> y_823910@tsmc.com
> 週一無肉日吃素救地球(Meat Free Monday Taiwan)
>
>
>
>
>
>                      jdcryans@gmail.co
>                      m                        To:      hbase-user@hadoop.apache.org
>                      Sent by:                 cc:      (bcc: Y_823910/TSMC)
>                      jdcryans@gmail.co        Subject: Re: RetriesExhaustedException
>                      m
>
>
>                      2010/03/06 02:22
>                      AM
>                      Please respond to
>                      hbase-user
>
>
>
>
>
>
> It will, if the region server tells the client that the region moved
> or was split, it throws a NotServingRegionException which the client
> understands and then asks the .META. region for the new location. So
> in each retry it does 2 round trips. Please read
> http://wiki.apache.org/hadoop/Hbase/HbaseArchitecture#client
>
> I'm not sure where this ClosedByInterruptException is coming from...
> It's not something I've seen before in our client.
>
> J-D
>
> 2010/3/4  <y_823910@tsmc.com>:
>> Hi,
>> In order to prevent from visiting META too often.
>> I keep the HTable for a while.
>> Hbase client won't try to get the lastest META while it can't
>> reach the data, only retry 10 times, right?
>> Region information may change.
>> So if we keep the META infomation too long, such exception
>> will happen very often. Is it correct?
>>
>>
>> Fri Mar 05 13:44:00 CST 2010
>> org.apache.hadoop.hbase.client.RetriesExhaustedException:
>> Trying to contact region server 10.81.47.42:60020
>> for region table1,,1264592014593, row 'HK.001', but failed after 10
>> attempts.
>> Exceptions:
>> java.nio.channels.ClosedByInterruptException
>> java.nio.channels.ClosedByInterruptException
>> java.nio.channels.ClosedByInterruptException
>> java.nio.channels.ClosedByInterruptException
>> java.nio.channels.ClosedByInterruptException
>> java.nio.channels.ClosedByInterruptException
>> java.nio.channels.ClosedByInterruptException
>> java.nio.channels.ClosedByInterruptException
>> java.nio.channels.ClosedByInterruptException
>> java.nio.channels.ClosedByInterruptException
>>
>>
>>
>>
>> Fleming Chiu(邱宏明)
>> 707-6128
>> y_823910@tsmc.com
>> 週一無肉日吃素救地球(Meat Free Monday Taiwan)
>>
>>
>>
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