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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17211) Add more details in log when UnknownScannerException thrown in ScannerCallable
Date Wed, 30 Nov 2016 16:14:59 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15708996#comment-15708996
] 

stack commented on HBASE-17211:
-------------------------------

+1 (Can address [~jmspaggi] comment on commit).

> 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
>         Attachments: HBASE-17211.patch
>
>
> 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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