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From Vinay Gupta <vingup2...@yahoo.com.INVALID>
Subject HBase 0.98.1 batch Increment throws OperationConflictException
Date Wed, 17 Sep 2014 06:24:52 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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