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From "Danilo Tuler (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AMQ-2440) stomp+nio leaking file descriptor on client drop
Date Tue, 06 Oct 2009 12:42:53 GMT

    [ https://issues.apache.org/activemq/browse/AMQ-2440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=54628#action_54628
] 

Danilo Tuler commented on AMQ-2440:
-----------------------------------

- Start a server with a single stomp+nio transport. StompDropTestServer.java attached.

- Now you need a way to see the TCP ports opened by the server process. netstat will do, but
I'm using "Process Explorer" [1] on Windows XP. Choose the process on the list, go to properties
page, TCP/IP tab.

- For the client I'm using the gozirra library, which is a java stomp client [2]. I think
StompConnection from ActiveMQ would lead to the same issue. But my application already uses
gozirra. Create a client, StompDropTestConsumer.java attached.
No matter if the client calls disconnect or not, the server TCP ports will still be opened
when the client terminates (and won't be reused).

[1] http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx
[2] http://www.germane-software.com/software/Java/Gozirra/


> stomp+nio leaking file descriptor on client drop
> ------------------------------------------------
>
>                 Key: AMQ-2440
>                 URL: https://issues.apache.org/activemq/browse/AMQ-2440
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Transport
>    Affects Versions: 5.3.0
>         Environment: Windows XP
>            Reporter: Danilo Tuler
>            Assignee: Dejan Bosanac
>         Attachments: AMQ-2440-1.txt, StompDropTestConsumer.java, StompDropTestServer.java
>
>
> The bug is observed on code checkout from https://svn.apache.org/repos/asf/activemq/tags/activemq-5.3.0
> A server is initiated with stomp+nio transport on port 61612.
> A client connects. A SelectorWorker is created on SelectorManager:68.
> If the client drops the connection an exception is received at StompNIOTransport:91.
> "java.io.IOException: An existing connection was forcibly closed by the remote host".
> But selector are not cleaned up. It works with stomp transport. But not with stomp+nio.
> What I see in the end is an increasing number of "connections" if the JVM.

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