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From Raghava Mutharaju <m.vijayaragh...@gmail.com>
Subject Scanner Exception
Date Thu, 03 Jun 2010 20:16:41 GMT
Hi all,

      I wrote a custom filter and used it with scan. I am getting the
following exceptions. If I use any built-in filters, it works fine. I
searched around and one of the suggestions was to increase the lease
timeout. Since it works fine for built-in filters, I am assuming that this
is not the case. Is it that there is something wrong with my filter
implementation?

Regards,
Raghava.

Master log:

org.apache.hadoop.hbase.UnknownScannerException: Name: -1
	at org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.java:1889)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	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)
2010-06-03 16:02:10,775 INFO org.apache.hadoop.ipc.HBaseServer: IPC
Server handler 9 on 60770, call next(-1, 1) from 130.108.56.225:61091:
error: org.apache.hadoop.hbase.UnknownScannerException: Name: -1


Console:

Exception in thread "main"
org.apache.hadoop.hbase.client.RetriesExhaustedException: Trying to contact
region server 130.108.56.225:60770 for region table1,,1274648045785, row '',
but failed after 10 attempts.
Exceptions:
java.io.IOException: Call to /130.108.56.225:60770 failed on local
exception: java.io.EOFException
java.io.IOException: Call to /130.108.56.225:60770 failed on local
exception: java.io.EOFException
java.io.IOException: Call to /130.108.56.225:60770 failed on local
exception: java.io.EOFException
java.io.IOException: Call to /130.108.56.225:60770 failed on local
exception: java.io.EOFException
java.io.IOException: Call to /130.108.56.225:60770 failed on local
exception: java.io.EOFException
java.io.IOException: Call to /130.108.56.225:60770 failed on local
exception: java.io.EOFException
java.io.IOException: Call to /130.108.56.225:60770 failed on local
exception: java.io.EOFException
java.io.IOException: Call to /130.108.56.225:60770 failed on local
exception: java.io.EOFException
java.io.IOException: Call to /130.108.56.225:60770 failed on local
exception: java.io.EOFException
java.io.IOException: Call to /130.108.56.225:60770 failed on local
exception: java.io.EOFException

    at
org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getRegionServerWithRetries(HConnectionManager.java:1055)
    at
org.apache.hadoop.hbase.client.HTable$ClientScanner.nextScanner(HTable.java:2003)
    at
org.apache.hadoop.hbase.client.HTable$ClientScanner.initialize(HTable.java:1923)
    at org.apache.hadoop.hbase.client.HTable.getScanner(HTable.java:403)
    at
org.knoesis.reasoning.MR.FilterReadClient.main(FilterReadClient.java:58)

Line 58 above has a call to getScanner(CustomFilterInstance) of HTable.

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