Hmm. I see. Now i see the 165 line at TableInputFormat. Can map number be operated with a setNumMapTasks() method? What is the current split policy?
On 2/18/08, stack <[EMAIL PROTECTED]> wrote: > Probably that the lease expired on the scanner your map or reduce task > was using. Any other exceptions in the log or does the processing of > the data to put into hbase take a long time to do? > St.Ack > > edward yoon wrote: > > I tried scan a 1 thousand * 1 thousand table twice on mapreduce. > > BTW, What is this exception mean? > > > > ---- > > 08/02/18 11:34:53 INFO mapred.JobClient: Task Id : > > task_200802181109_0002_m_000000_1, Status : FAILED > > org.apache.hadoop.hbase.UnknownScannerException: > > org.apache.hadoop.hbase.UnknownScannerException: -4925937627020823950 > > at > > org.apache.hadoop.hbase.HRegionServer.close(HRegionServer.java:1543) > > at sun.reflect.GeneratedMethodAccessor11.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$Server.call(HbaseRPC.java:413) > > at org.apache.hadoop.ipc.Server$Handler.run(Server.java:910) > > > > 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.HTable$ClientScanner.close(HTable.java:1169) > > at > > org.apache.hadoop.hama.mapred.TableInputFormat$TableRecordReader.close(Unknown > > Source) > > at > > org.apache.hadoop.mapred.MapTask$TrackedRecordReader.close(MapTask.java:155) > > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:212) > > at > > org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2065) > > > > > > -- B. Regards, Edward yoon @ NHN, corp.
