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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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