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From Vinay Gupta <vingup2...@yahoo.com.INVALID>
Subject HBase 0.98.1 batch Increment OperationConflictException
Date Wed, 17 Sep 2014 01:03:28 GMT
Hi, 
 We are using Hbase batch API and with 0.98.1 we get the following exception on using batch()
with Increment
————————————
org.apache.hadoop.hbase.exceptions.OperationConflictException: The operation with nonce {5266048044724982303,
5395957753774586342} on row [rowkey13-20140331] may have already completed
	at org.apache.hadoop.hbase.regionserver.HRegionServer.startNonceOperation(HRegionServer.java:4199)
	at org.apache.hadoop.hbase.regionserver.HRegionServer.increment(HRegionServer.java:4163)
	at org.apache.hadoop.hbase.regionserver.HRegionServer.doNonAtomicRegionMutation(HRegionServer.java:3424)
	at org.apache.hadoop.hbase.regionserver.HRegionServer.multi(HRegionServer.java:3359)
	at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:29503)
	at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2012)
	at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:98)
	at org.apache.hadoop.hbase.ipc.SimpleRpcScheduler.consumerLoop(SimpleRpcScheduler.java:160)
	at org.apache.hadoop.hbase.ipc.SimpleRpcScheduler.access$000(SimpleRpcScheduler.java:38)
	at org.apache.hadoop.hbase.ipc.SimpleRpcScheduler$1.run(SimpleRpcScheduler.java:110)
	at java.lang.Thread.run(Thread.java:745)
————————————
Eventually the job fails with 
"Error: org.apache.hadoop.hbase.client.RetriesExhaustedWithDetailsException"

The same job works in Hbase 0.94 installation. Any tips on which config settings to play with
to resolve this?
Is the application supposed to handle these exceptions? (something new in Hbase 0.98 or 0.96
??)

Thanks,
-Vinay


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