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https://issues.apache.org/jira/browse/AMQ-4441?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrei N.Sobchuck updated AMQ-4441:
-----------------------------------
Attachment: AMQ_4441.java
Try attached AMQ_4441. It's not stable (due to nature of the issue) and it can
take long time to crash.
> Race condition in PooledConnectionFactory.createConnection
> ----------------------------------------------------------
>
> Key: AMQ-4441
> URL: https://issues.apache.org/jira/browse/AMQ-4441
> Project: ActiveMQ
> Issue Type: Bug
> Components: activemq-pool
> Affects Versions: 5.8.0
> Reporter: Andrei N.Sobchuck
> Attachments: AMQ_4441.java
>
>
> `PooledConnectionFactory.createConnection(String userName, String password)`
> can return broken Connection. By `broken` I mean PooledConnection with
> referenceCount==1, but without underlying ActiveMQConnection.
> The problem is in lines
> {code}
> connection = connectionsPool.borrowObject(key);
> ...
> return new PooledConnection(connection);
> {code}
> While method `borrowObject` validates the connection and `new
> PooledConnection` increments referenceCount, it's possible that some thread
> calls `ConnectionPool.decrementReferenceCount()` just between `borrowObject`
> and `new PooledConnection`. referenceCount at this stage can be a zero and
> the ConnectionPool became closed just prior to `new PooledConnection`.
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