[HBASE-16609] Fake cells EmptyByteBufferedCell created in read path not implementing SettableSequenceId

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.0
• Hadoop Flags: Reviewed
• Assignee: Yu Sun
• Reporter: Yu Sun
• Created: 11/Sep/16 01:36
• Updated: 17/Jun/22 05:16
• Resolved: 12/Sep/16 15:53

Description

I backport offheap in 2.0 to hbase-1.1.2, and when testing，I encounter a similar problem HBASE-15379 ,Here is the stack trace:

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)

this will occur in read path when offheap is used. mostly due to ByteBuffer backed Cells dont implement interface SettableSequenceId.

Issue Links

• is related to: HBASE-11425 Cell/DBB end-to-end on the read-path