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https://issues.apache.org/jira/browse/QPID-4489?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rob Godfrey resolved QPID-4489.
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Resolution: Fixed
Change looks good. Affect obviously isolated to people opening and then
immediately closing connections before establishing AMQP protocol. As such I
would be happy with this going into 0.20.
> [Java broker] ensure the IoSender is stopped when a connection closes before
> receiving a protocol initiation
> ------------------------------------------------------------------------------------------------------------
>
> Key: QPID-4489
> URL: https://issues.apache.org/jira/browse/QPID-4489
> Project: Qpid
> Issue Type: Bug
> Components: Java Broker
> Affects Versions: 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.20
> Reporter: Robbie Gemmell
> Assignee: Rob Godfrey
> Fix For: 0.21
>
>
> If the IoReceiver exits (due to the TCP connection closing) before a protocol
> version initiation is received (successfully or otherwise), the IoSender will
> fail to be closed.
> In this case the IoReceiver signals closed() to the receiver it was created
> with, a MultiVersionProtocolEngine with an initial SelfDelegateProtocolEngine
> delegate, but this delegate fails to close the IoSender. The IoSender is
> currently only closed when a received version initiation fails and the broker
> replies with a valid protocol version (for negotiation purposes) before
> closing the network connection, or if the closed() signal occurs after a
> protocol version initiation succeeds and the MVPE delegate is replaced with
> the relevant versions delegate.
> The SelfDelegateProtocolEngine should be updated to close the associated
> network connection (and thus the IoSender) if its closed() method is called.
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