[jira] [Commented] (HBASE-4893) HConnectionImplementation is closed but not deleted

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

    [ https://issues.apache.org/jira/browse/HBASE-4893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13170488#comment-13170488 ] 

Zhihong Yu commented on HBASE-4893:
-----------------------------------

Integrated patch v2 to 0.90
It should be in 0.90.6 because 0.90.5 RC has been cut.

Thanks for the patch Mubarak.

Thanks for the review Stack.
                
> HConnectionImplementation is closed but not deleted
> ---------------------------------------------------
>
>                 Key: HBASE-4893
>                 URL: https://issues.apache.org/jira/browse/HBASE-4893
>             Project: HBase
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 0.90.1
>         Environment: Linux 2.6, HBase-0.90.1
>            Reporter: Mubarak Seyed
>              Labels: noob
>             Fix For: 0.90.6
>
>         Attachments: HBASE-4893.v1.patch, HBASE-4893.v2.patch
>
>
> In abort() of HConnectionManager$HConnectionImplementation, instance of HConnectionImplementation is marked as this.closed=true.
> There is no way for client application to check the hbase client connection whether it is still opened/good (this.closed=false) or not. We need a method to validate the state of a connection like isClosed().
> {code}
> public boolean isClosed(){
>    return this.closed;
> } 
> {code}
> Once the connection is closed and it should get deleted. Client application still gets a connection from HConnectionManager.getConnection(Configuration) and tries to make a RPC call to RS, since connection is already closed, HConnectionImplementation.getRegionServerWithRetries throws RetriesExhaustedException with error message
> {code}
> Caused by: org.apache.hadoop.hbase.client.RetriesExhaustedException: Trying to contact region server null for region , row 'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxx', but failed after 10 attempts.
> Exceptions:
> java.io.IOException: org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@7eab48a7 closed
> java.io.IOException: org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@7eab48a7 closed
> java.io.IOException: org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@7eab48a7 closed
> java.io.IOException: org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@7eab48a7 closed
> java.io.IOException: org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@7eab48a7 closed
> java.io.IOException: org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@7eab48a7 closed
> java.io.IOException: org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@7eab48a7 closed
> java.io.IOException: org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@7eab48a7 closed
> java.io.IOException: org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@7eab48a7 closed
> java.io.IOException: org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@7eab48a7 closed
> 	at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getRegionServerWithRetries(HConnectionManager.java:1008)
> 	at org.apache.hadoop.hbase.client.HTable.get(HTable.java:546)
> {code}

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