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https://issues.apache.org/jira/browse/HBASE-6956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13507639#comment-13507639
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Adrian Muraru commented on HBASE-6956:
--------------------------------------
There is an ongoing discussion on HBASE-6580 addressing this issue, a broader
scope but would resolve the broken HConnection discussed here.
The agreement there was to deprecate HTablePool and rely on lightweight (read
cheap) HTable (HBASE-4805) retrieved from a new HConnection#getTable()
I have a patch on HBASE-6580 that proposes a new HTableInterfaceFactory
:https://issues.apache.org/jira/secure/attachment/12554094/HBASE-6580_v1.patch
and can be used as a custom factory when creating the HTablePool
{noformat}org.apache.hadoop.hbase.client.HTablePool.HTablePool(Configuration
config, int maxSize, HTableInterfaceFactory tableFactory){noformat}
> Do not return back to HTablePool closed connections
> ---------------------------------------------------
>
> Key: HBASE-6956
> URL: https://issues.apache.org/jira/browse/HBASE-6956
> Project: HBase
> Issue Type: Bug
> Components: Client
> Affects Versions: 0.90.6
> Reporter: Igor Yurinok
>
> Sometimes we see a lot of Exception about closed connections:
> {code}
>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@553fd068
> closed
> org.apache.hadoop.hbase.client.ClosedConnectionException:
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@553fd068
> closed
> {code}
> After investigation we assumed that it occurs because closed connection
> returns back into HTablePool.
> For our opinion best solution is check whether the table is closed in method
> HTablePool.putTable and if true don't add it into the queue and release such
> HTableInterface.
> But unfortunatly right now there are no access to HTable#closed field through
> HTableInterface
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