[jira] [Created] (HBASE-16609) Fake cells EmptyByteBufferedCell created in read path not implementing SettableSequenceId

["Yu Sun (JIRA)" <ji...@apache.org>]

Yu Sun created HBASE-16609:
------------------------------

             Summary: Fake cells EmptyByteBufferedCell  created in read path not implementing SettableSequenceId 
                 Key: HBASE-16609
                 URL: https://issues.apache.org/jira/browse/HBASE-16609
             Project: HBase
          Issue Type: Bug
            Reporter: Yu Sun
            Assignee: Yu Sun


I backport offheap in 2.0 to hbase-1.1.2, and when testing，I encounter a similar problem HBASE-14099 ,Here is the stack trace:
{noformat}
java.io.IOException: java.lang.UnsupportedOperationException: Cell is not of type org.apache.hadoop.hbase.SettableSequenceId
        at org.apache.hadoop.hbase.CellUtil.setSequenceId(CellUtil.java:915)
        at org.apache.hadoop.hbase.regionserver.StoreFileScanner.setCurrentCell(StoreFileScanner.java:203)
        at org.apache.hadoop.hbase.regionserver.StoreFileScanner.requestSeek(StoreFileScanner.java:338)
        at org.apache.hadoop.hbase.regionserver.KeyValueHeap.generalizedSeek(KeyValueHeap.java:321)
        at org.apache.hadoop.hbase.regionserver.KeyValueHeap.requestSeek(KeyValueHeap.java:279)
        at org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.java:821)
        at org.apache.hadoop.hbase.regionserver.StoreScanner.seekAsDirection(StoreScanner.java:809)
        at org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java:636)
        at org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java:153)
        at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.populateResult(HRegion.java:5611)
        at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextInternal(HRegion.java:5750)
        at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextRaw(HRegion.java:5551)
        at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.next(HRegion.java:5528)
        at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.next(HRegion.java:5515)
        at org.apache.hadoop.hbase.regionserver.RSRpcServices.get(RSRpcServices.java:2125)
        at org.apache.hadoop.hbase.regionserver.RSRpcServices.get(RSRpcServices.java:2068)
        at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:32201
)
        at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:790)
        at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:102)
        at org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop(RpcExecutor.java:133)
        at org.apache.hadoop.hbase.ipc.RpcExecutor$1.run(RpcExecutor.java:108)
{noformat}
this will occur in read path when offheap is used. mostly due to ByteBuffer backed Cells dont implement interface SettableSequenceId. 




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