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From "Kathey Marsden (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-5560) Java deadlock between LogicalConnection40 and ClientXAConnection40
Date Wed, 28 Dec 2011 19:02:30 GMT

    [ https://issues.apache.org/jira/browse/DERBY-5560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13176764#comment-13176764
] 

Kathey Marsden commented on DERBY-5560:
---------------------------------------

Some discussion regarding this issue is in this thread:
http://old.nabble.com/Could-someone-give-me-some-guidance-on-DERBY-5560-to33046146.html

                
> Java deadlock between LogicalConnection40 and ClientXAConnection40
> ------------------------------------------------------------------
>
>                 Key: DERBY-5560
>                 URL: https://issues.apache.org/jira/browse/DERBY-5560
>             Project: Derby
>          Issue Type: Bug
>          Components: Network Client
>    Affects Versions: 10.8.2.2
>         Environment: Solaris 10
> Glassfish V2.1.1 
> ClientXADataSource connection pool setup to close all connections on any error
>            Reporter: Brett Bergquist
>
> There is a Java deadlock between LogicalConnection40 and ClientXAConnection40.  The order
of calls that cause the deadlock are:
> Thread 1
> ----
> LogicalConnection.close
> ClientPooledConnection.recycleConnection
> Thread 2
> ----
> ClientPooledConnection.close
> LogicalConnection.nullPhysicalConnection
> Thread 1 acquires a lock on the LogicalConnection and attempts to acquire a lock on the
ClientPooledConnection
> Thread 2 acquires a lock on the ClientPooledConnection and attempts to acquire a lock
on the LogicalConnection
> In production this occurs when one thread is committing a transaction and another thread
is trying to close the connection.  This occurred because the Glassfish connection pool is
setup to close all connections on any error on any connection and an error has been detected
on another connection in the pool.

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