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From "Edward J. Yoon" <edwardy...@apache.org>
Subject ScannerTimeoutException
Date Fri, 02 Jan 2009 12:07:41 GMT
I received ScannerTimeoutException.

hbase.regionserver.lease.period is 240000.
table : 100 rows, one column, the cell is 2 MB.

So, total size of table entries is 200 MB.
Each map open a scanner of another table and, doing little big calculation.

How can I avoid ScannerTimeoutException?

----
org.apache.hadoop.hbase.client.ScannerTimeoutException
        at org.apache.hadoop.hbase.client.HTable$ClientScanner.next(HTable.java
1527)
        at org.apache.hama.mapred.BlockInputFormat$TableRecordReader.next(Block
nputFormat.java:79)
        at org.apache.hama.mapred.BlockInputFormat$TableRecordReader.next(Block
nputFormat.java:47)
        at org.apache.hadoop.mapred.MapTask$TrackedRecordReader.moveToNext(MapT
sk.java:186)
        at org.apache.hadoop.mapred.MapTask$TrackedRecordReader.next(MapTask.ja
a:170)
        at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:48)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:332)
        at org.apache.hadoop.mapred.Child.main(Child.java:155)
Caused by: org.apache.hadoop.hbase.UnknownScannerException: org.apache.hadoop.h
ase.UnknownScannerException: Name: 8114675974483083235
        at org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServe
.java:1561)
        at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcce
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:632)
        at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java
894)

        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method

        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstruc
orAccessorImpl.java:39)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Delegating
onstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
        at org.apache.hadoop.hbase.RemoteExceptionHandler.decodeRemoteException
RemoteExceptionHandler.java:95)
        at org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getRe
ionServerWithRetries(HConnectionManager.java:855)
        at org.apache.hadoop.hbase.client.HTable$ClientScanner.next(HTable.java
1523)
        ... 7 more

-- 
Best Regards, Edward J. Yoon @ NHN, corp.
edwardyoon@apache.org
http://blog.udanax.org

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