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From "Murali Mogalayapalli (JIRA)" <>
Subject [jira] [Updated] (AMQ-4955) TCP Connections and related thread leak.
Date Tue, 24 Dec 2013 20:07:50 GMT


Murali Mogalayapalli updated AMQ-4955:

    Attachment: TCP-Connection.jpg

> TCP Connections and related thread leak.
> ----------------------------------------
>                 Key: AMQ-4955
>                 URL:
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.8.0
>         Environment: Windows 2008 R2, Jdk 1.7.40
>            Reporter: Murali Mogalayapalli
>            Priority: Critical
>         Attachments: TCP-Connection.jpg, ThreadStack.jpg
> TCP Connections and related thread leak.
> Scenario
> Active MQ version 5.8
> NMS Client version 1.6
> OS - Windows 2008 R2
> JDK - 1.7.x
> activemq.xml is attached
> If a client connectivity gets lost between the time the initial socket is created and
the exchange of the wire format, the active MQ server's Client's server thread gets blocked
in socket read hanging out the TCP connection and the related thread
> Here are the steps to recreate
> 1. Configure the Active MQ server with the activemq.xml attached.
> 2. Start the client in a debugger and have a break point at a place in such a way that
the client can be disconnected after the socket is established.
> 3. Once the breakpoint is hit, disconnect the client machine from the network
> 4. Kill the client- This basically simulates a situation where the socket tear down packets
are not reached the active mq server.
> 5. Open the JConsole. Look for the hanging TCP connection and the related thread.
> Is there an configurable option in Active MQ to sweep and close the connections, on regular
interval, that still didn't finish the wire protocol negotiation?

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