hadoop-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Vimal Jain <vkj...@gmail.com>
Subject High Full GC count for Region server
Date Tue, 22 Oct 2013 07:02:16 GMT
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=/192.168.20.30:50010remote=/
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

Mime
View raw message