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From Ted Yu <yuzhih...@gmail.com>
Subject Re: High Full GC count for Region server
Date Tue, 22 Oct 2013 16:49:58 GMT
bq. java.io.IOException: File /hbase/event_data/
4c3765c51911d6c67037a983d205a010/.tmp/bfaf8df33d5b4068825e3664d3e4b2b0 could
only be replicated to 0 nodes, instead of 1

Have you checked Namenode / Datanode logs ?
Looks like hdfs was not stable.


On Tue, Oct 22, 2013 at 9:01 AM, Vimal Jain <vkjk89@gmail.com> wrote:

> HI Jean,
> Thanks for your reply.
> I have total 8 GB memory and distribution is as follows:-
>
> Region server  - 2 GB
> Master,Namenode,Datanode,Secondary Namenode,Zookepeer - 1 GB
> OS - 1 GB
>
> Please let me know if you need more information.
>
>
> On Tue, Oct 22, 2013 at 8:15 PM, Jean-Marc Spaggiari <
> jean-marc@spaggiari.org> wrote:
>
> > Hi Vimal,
> >
> > What are your settings? Memory of the host, and memory allocated for the
> > different HBase services?
> >
> > Thanks,
> >
> > JM
> >
> >
> > 2013/10/22 Vimal Jain <vkjk89@gmail.com>
> >
> > > Hi,
> > > I am running in Hbase in pseudo distributed mode. ( Hadoop version -
> > 1.1.2
> > > , Hbase version - 0.94.7 )
> > > I am getting few exceptions in both hadoop ( namenode , datanode) logs
> > and
> > > hbase(region server).
> > > When i search for these exceptions on google , i concluded  that
> problem
> > is
> > > mainly due to large number of full GC in region server process.
> > >
> > > I used jstat and found that there are total of 950 full GCs in span of
> 4
> > > days for region server process.Is this ok?
> > >
> > > I am totally confused by number of exceptions i am getting.
> > > Also i get below exceptions intermittently.
> > >
> > >
> > > Region server:-
> > >
> > > 2013-10-22 12:00:26,627 WARN org.apache.hadoop.ipc.HBaseServer:
> > > (responseTooSlow):
> > > {"processingtimems":15312,"call":"next(-6681408251916104762, 1000), rpc
> > > version=1, client version=29,
> methodsFingerPrint=-1368823753","client":"
> > > 192.168.20.31:48270
> > >
> > >
> >
> ","starttimems":1382423411293,"queuetimems":0,"class":"HRegionServer","responsesize":4808556,"method":"next"}
> > > 2013-10-22 12:06:17,606 WARN org.apache.hadoop.ipc.HBaseServer:
> > > (operationTooSlow): {"processingtimems":14759,"client":"
> > > 192.168.20.31:48247
> > >
> > >
> >
> ","timeRange":[0,9223372036854775807],"starttimems":1382423762845,"responsesize":61,"class":"HRegionServer","table":"event_data","cacheBlocks":true,"families":{"ginfo":["netGainPool"]},"row":"1629657","queuetimems":0,"method":"get","totalColumns":1,"maxVersions":1}
> > >
> > > 2013-10-18 10:37:45,008 WARN org.apache.hadoop.hdfs.DFSClient:
> > DataStreamer
> > > Exception: org.apache.hadoop.ipc.RemoteException: java.io.IOException:
> > File
> > >
> > >
> >
> /hbase/event_data/4c3765c51911d6c67037a983d205a010/.tmp/bfaf8df33d5b4068825e3664d3e4b2b0
> > > could only be replicated to 0 nodes, instead of 1
> > >     at
> > >
> > >
> >
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1639)
> > >
> > > Name node :-
> > > java.io.IOException: File
> > >
> > >
> >
> /hbase/event_data/433b61f2a4ebff8f2e4b89890508a3b7/.tmp/99797a61a8f7471cb6df8f7b95f18e9e
> > > could only be replicated to 0 nodes, instead of 1
> > >
> > > java.io.IOException: Got blockReceived message from unregistered or
> dead
> > > node blk_-2949905629769882833_52274
> > >
> > > Data node :-
> > > 480000 millis timeout while waiting for channel to be ready for write.
> > ch :
> > > java.nio.channels.SocketChannel[connected local=/192.168.20.30:50010
> > > remote=/
> > > 192.168.20.30:36188]
> > >
> > > ERROR org.apache.hadoop.hdfs.server.datanode.DataNode:
> > > DatanodeRegistration(
> > > 192.168.20.30:50010,
> > > storageID=DS-1816106352-192.168.20.30-50010-1369314076237,
> > infoPort=50075,
> > > ipcPort=50020):DataXceiver
> > > java.io.EOFException: while trying to read 39309 bytes
> > >
> > >
> > > --
> > > Thanks and Regards,
> > > Vimal Jain
> > >
> >
>
>
>
> --
> Thanks and Regards,
> Vimal Jain
>

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