How much namenode handler (dfs.namenode.handler.count) you have defined for your cluster?
- Alex -- Alexander Lorenz http://mapredit.blogspot.com On Feb 1, 2012, at 12:25 PM, Xiaobin She wrote: > > hi Alex, > > I'm using jre 1.6.0_24 > > with hadoop 0.20.0 > hive 0.80 > > thx > > > 2012/2/1 alo alt <wget.n...@googlemail.com> > Hi, > > + hdfs-user (bcc'd) > > which jre version u use? > > - Alex > > -- > Alexander Lorenz > http://mapredit.blogspot.com > > On Feb 1, 2012, at 8:16 AM, Xiaobin She wrote: > >> hi , >> >> >> I'm using hive to do some log analysis, and I have encountered a problem. >> >> My cluster have 3 nodes, one for NameNode/JobTracker and the other two for >> DataNode/TaskTracker >> >> One of the tasktracker will repeatedly receive KillJobAction and then delete >> unknown jobs >> >> the logs look like: >> >> 2012-01-31 00:35:37,640 INFO org.apache.hadoop.mapred.TaskTracker: Received >> 'KillJobAction' for job: job_201201301055_0381 >> 2012-01-31 00:35:37,640 WARN org.apache.hadoop.mapred.TaskTracker: Unknown >> job job_201201301055_0381 being deleted. >> 2012-01-31 00:36:22,697 INFO org.apache.hadoop.mapred.TaskTracker: Received >> 'KillJobAction' for job: job_201201301055_0383 >> 2012-01-31 00:36:22,698 WARN org.apache.hadoop.mapred.TaskTracker: Unknown >> job job_201201301055_0383 being deleted. >> 2012-01-31 01:05:34,108 INFO org.apache.hadoop.mapred.TaskTracker: Received >> 'KillJobAction' for job: job_201201301055_0384 >> 2012-01-31 01:05:34,108 WARN org.apache.hadoop.mapred.TaskTracker: Unknown >> job job_201201301055_0384 being deleted. >> 2012-01-31 01:07:43,280 INFO org.apache.hadoop.mapred.TaskTracker: Received >> 'KillJobAction' for job: job_201201301055_0385 >> 2012-01-31 01:07:43,280 WARN org.apache.hadoop.mapred.TaskTracker: Unknown >> job job_201201301055_0385 being deleted. >> >> this happens occasionally, and if this happens, this tasktracker will do >> notghing but keep receiveing KillJobAction and delete unknown job, and thus >> the performance will drop down. >> >> to solve this problem, I have to restart the cluster. >> but obviously, this is not a good solution. >> >> these jobs eventually will be run on the other tasktracker, and they will >> run well, the job will success. >> >> has anybody have encountered this problem and give me some advices? >> >> and occasionally there will be some errlog like: >> >> 2012-01-31 13:11:40,183 INFO org.apache.hadoop.ipc.Server: IPC Server >> listener on 55837: readAndProcess threw exception java.io.IOException: >> Connection reset by peer. Count of bytes read: 0 >> java.io.IOException: Connection reset by peer >> at sun.nio.ch.FileDispatcher.read0(Native Method) >> at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:21) >> at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:202) >> at sun.nio.ch.IOUtil.read(IOUtil.java:175) >> at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:243) >> at org.apache.hadoop.ipc.Server.channelRead(Server.java:1211) >> at org.apache.hadoop.ipc.Server.access$2300(Server.java:77) >> at >> org.apache.hadoop.ipc.Server$Connection.readAndProcess(Server.java:799) >> at org.apache.hadoop.ipc.Server$Listener.doRead(Server.java:419) >> at org.apache.hadoop.ipc.Server$Listener.run(Server.java:328) >> 2012-01-31 13:11:40,211 INFO org.apache.hadoop.mapred.JvmManager: JVM : >> jvm_201201311041_0071_r_-1096994286 exited. Number of tasks it ran: 0 >> 2012-01-31 13:11:40,214 INFO org.apache.hadoop.mapred.TaskTracker: Killing >> unknown JVM jvm_201201311041_0071_r_-386575334 >> 2012-01-31 13:11:40,221 INFO org.apache.hadoop.ipc.Server: IPC Server >> listener on 55837: readAndProcess threw exception java.io.IOException: >> Connection reset by peer. Count of bytes read: 0 >> java.io.IOException: Connection reset by peer >> at sun.nio.ch.FileDispatcher.read0(Native Method) >> at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:21) >> at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:202) >> at sun.nio.ch.IOUtil.read(IOUtil.java:175) >> at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:243) >> at org.apache.hadoop.ipc.Server.channelRead(Server.java:1211) >> at org.apache.hadoop.ipc.Server.access$2300(Server.java:77) >> at >> org.apache.hadoop.ipc.Server$Connection.readAndProcess(Server.java:799) >> at org.apache.hadoop.ipc.Server$Listener.doRead(Server.java:419) >> at org.apache.hadoop.ipc.Server$Listener.run(Server.java:328) >> >> Is there some connections between these two errors? >> >> thank you very much! >> >> xiaobin > >