All that means is that the task stayed in map() for 10 minutes, blocked on "something".
If you were scanning an hbase table, and didn't get a new row after 1 minute, then the scanner would expire. That's orthogonal tho. You need to figure what you're blocking on, add logging and try to jstack your Child processes for example. J-D On Thu, May 12, 2011 at 7:21 PM, Venkatesh <[email protected]> wrote: > > Hi > Using hbase-0.20.6 > > mapreduce job started failing in the map phase (using hbase table as input > for mapper)..(ran fine for a week or so starting with empty tables).. > > task tracker log: > > > Task attempt_201105121141_0002_m_000452_0 failed to report status for 600 > seconds. Killing > > > Region server log: > > 2011-05-12 18:27:39,919 INFO > org.apache.hadoop.hbase.regionserver.HRegionServer: Scanner > -7857209327501974146 lease expired > > 2011-05-12 18:28:29,716 ERROR > org.apache.hadoop.hbase.regionserver.HRegionServer:org.apache.hadoop.hbase.UnknownScannerException: > Name: -7857209327501974146 > at > org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.java:1880) > 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$Server.call(HBaseRPC.java:657) > at > org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:915) > > > 2011-05-12 18:28:29,897 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server > handler 3 on 60020, call next(-78572093275019 > 74146, 1) from .....:35202: error: > org.apache.hadoop.hbase.UnknownScannerException: Name: -7857209327501974146 > org.apache.hadoop.hbase.UnknownScannerException: Name: -7857209327501974146 > at > org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.java:1880) > 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$Server.call(HBaseRPC.java:657) > at > org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:915) > > I don't see any error in datanodes > > Appreciate any help > thanks > v > > >
