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Posted to issues@hbase.apache.org by "ramkrishna.s.vasudevan (Resolved) (JIRA)" <ji...@apache.org> on 2012/01/26 08:29:40 UTC
[jira] [Resolved] (HBASE-4893) HConnectionImplementation is closed
but not deleted
[ https://issues.apache.org/jira/browse/HBASE-4893?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ramkrishna.s.vasudevan resolved HBASE-4893.
-------------------------------------------
Resolution: Fixed
Assignee: Mubarak Seyed
Resolving the issue
> 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
> Assignee: 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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