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https://issues.apache.org/jira/browse/QPID-3575?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13142224#comment-13142224
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Pavel Moravec commented on QPID-3575:
-------------------------------------
Root cause of the bug:
1) Due to the nonexisting queue disallowed to be created, exception
"javax.jms.JMSException: Error registering consumer:
org.apache.qpid.AMQException .. Bind failed. No such queue: .." is thrown and
managed in AMQSession_0_10::setCurrentException and
AMQConnection::exceptionReceived is called.
2) hardError called to the cause returns true, causing
closer = (!_closed.getAndSet(true)) || closer;
is called. This has two consequences: a) _closed is set to true and b)
closeAllSessions is called later on.
3) Both a) and b) (even independently) sets _closed to true at the end.
4) When connection.close() method is called, close(List<AMQSession> sessions,
long timeout) method evaluates the main if-statement to false end directly
finishes. While we need doClose(sessions, timeout); to be called.
QPID-3289 and QPID-3234 refer to the core problem of session exceptions (which
are soft
errors as per the spec) are still treated as hard errors.
> connection leak after an attempt to subscribe to nonexisting queue
> ------------------------------------------------------------------
>
> Key: QPID-3575
> URL: https://issues.apache.org/jira/browse/QPID-3575
> Project: Qpid
> Issue Type: Bug
> Components: Java Client
> Affects Versions: 0.14
> Reporter: Pavel Moravec
> Attachments: TestQpidLeak.java
>
>
> Description of problem:
> If qpid.declare_queues is set to false and an attempt to subscribe to a
> non-existing queue is made, connection.close() method does not close the TCP
> connection. This causes a TCP connection leak for case when heartbeats are
> set.
> How reproducible:
> 100%
> Steps to Reproduce:
> 1. Start a fresh qpid broker with auth=no - make sure no
> "some.unreal.destination" queue is there
> 2. Run attached Java program
> 3. Do _not_ terminate it when a prompt appears in it
> 4. Run qpid-stat -c in parallel
> Actual results:
> qpid-stat shows 10 connections made by the client and despite
> connection.close() has been called for each of them.
> Expected results:
> qpid-stat does not show the 10 connections.
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