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From "Yu Li (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-17211) Add more details in log when UnknownScannerException thrown in ScannerCallable
Date Wed, 30 Nov 2016 15:56:58 GMT
Yu Li created HBASE-17211:
-----------------------------

             Summary: Add more details in log when UnknownScannerException thrown in ScannerCallable
                 Key: HBASE-17211
                 URL: https://issues.apache.org/jira/browse/HBASE-17211
             Project: HBase
          Issue Type: Improvement
            Reporter: Yu Li
            Assignee: Yu Li
            Priority: Minor


Currently if we try to close an already closed scanner, we may see below warning log which
is useless for debugging:
{noformat}
2016-06-23 01:21:21,101 WARN [main] org.apache.hadoop.hbase.client.ScannerCallable: Ignore,
probably already closed
org.apache.hadoop.hbase.UnknownScannerException: org.apache.hadoop.hbase.UnknownScannerException:
Name: 18706910, already closed?
    at org.apache.hadoop.hbase.regionserver.RSRpcServices.scan(RSRpcServices.java:2304)
    at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:32205)
    at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2188)
    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}
and here we propose to add more details about the scan in log.



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