On Tue, Nov 4, 2008 at 10:30 AM, Edward J. Yoon <[EMAIL PROTECTED]>wrote:
> While matrix-matrix mult, I received a message as below. Does anyone > know about UnknownScannerException? > > ---- > 08/11/04 11:24:57 INFO mapred.JobClient: map 90% reduce 28% > 08/11/04 11:24:59 INFO mapred.JobClient: map 90% reduce 30% > 08/11/04 11:26:49 INFO mapred.JobClient: Task Id : > attempt_200811041040_0003_m_000002_0, Status : FAILED > org.apache.hadoop.hbase.UnknownScannerException: > org.apache.hadoop.hbase.UnknownScannerException: Name: > -1151932123796109789 > at > org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.java:1077) > at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at > org.apache.hadoop.hbase.ipc.HbaseRPC$Server.call(HbaseRPC.java:554) > at org.apache.hadoop.ipc.Server$Handler.run(Server.java:888) > > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native > Method) > at > sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) > at > sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) > at java.lang.reflect.Constructor.newInstance(Constructor.java:513) > at > org.apache.hadoop.hbase.RemoteExceptionHandler.decodeRemoteException(RemoteExceptionHandler.java:82) > at > org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getRegionServerWithRetries(HConnectionManager.java:856) I doubt that there may be some region splitting/moving during scanning, so we get the RemoteException while getRegionServerWithRetires. > > at > org.apache.hadoop.hbase.client.HTable$ClientScanner.next(HTable.java:1155) > at > org.apache.hama.mapred.MatrixInputFormatBase$TableRecordReader.next(MatrixInputFormatBase.java:174) > at > org.apache.hama.mapred.MatrixInputFormatBase$TableRecordReader.next(MatrixInputFormatBase.java:56) > at > org.apache.hadoop.mapred.MapTask$TrackedRecordReader.next(MapTask.java:165) > at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:45) > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:227) > at > org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2207) > > 08/11/04 11:27:11 INFO mapred.JobClient: map 100% reduce 30% > 08/11/04 11:27:17 INFO mapred.JobClient: map 100% reduce 64% > 08/11/04 11:27:23 INFO mapred.JobClient: Job complete: > job_200811041040_0003 > 08/11/04 11:27:23 INFO mapred.JobClient: Counters: 13 > 08/11/04 11:27:23 INFO mapred.JobClient: File Systems > 08/11/04 11:27:23 INFO mapred.JobClient: Local bytes read=32057196 > 08/11/04 11:27:23 INFO mapred.JobClient: Local bytes written=64599524 > > -- > Best regards, Edward J. Yoon @ NHN, corp. > [EMAIL PROTECTED] > http://blog.udanax.org >
