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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