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https://issues.apache.org/jira/browse/AMQ-5155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14535383#comment-14535383
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Peter Pfort commented on AMQ-5155:
----------------------------------

Guten Tag, vielen Dank für Ihre Nachricht! Ich bin vom 01.05.2015 bis zum 
25.05.2015 nicht im Büro. Ihre Emails werden in dieser Zeit weder gelesen noch 
weitergeleitet. In dringenden Fällen wenden Sie sich bitte an den alfa Support 
(+49 (0) 6074 / 3104 - 333). Nach meiner Rückkehr werde ich Ihre Nachricht 
umgehend beantworten. Mit freundlichen Grüßen Best regards Peter Pfort


> Heartbeat fails in STOMP over WebSockets
> ----------------------------------------
>
>                 Key: AMQ-5155
>                 URL: https://issues.apache.org/jira/browse/AMQ-5155
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.9.1, 5.10.0
>            Reporter: Arjan van den Berg
>            Assignee: Timothy Bish
>            Priority: Minor
>             Fix For: 5.12.0
>
>         Attachments: AMQ-5155-jetty8.diff, AMQ-5155-jetty9.diff, 
> firefox_bug_example1.pcapng, patchfile.txt
>
>
> From AMQ-4740:
> I receive the following error after establishing a connection and heartbeat 
> through stomp.js. This seems to occur after the 'PING' is sent.
> ---------- stomp.js output
> <<< CONNECTED
> heart-beat:10000,10000
> session:ID:localhost.localdomain-45596-1396530920609-2:2
> server:ActiveMQ/5.10-SNAPSHOT
> version:1.1
> send PING every 10000ms 
> check PONG every 10000ms 
> <<< PONG 
> >>> PING 
> did not receive server activity for the last 20005ms 
> Whoops! Lost connection to ws://172.16.99.73:61614/stomp
> --------------------- activemq console ---------------
> WARN | Transport Connection to: StompSocket_19548821 failed: 
> java.io.IOException
> Exception in thread "ActiveMQ InactivityMonitor Worker" 
> java.lang.NullPointerException
> at 
> org.apache.activemq.transport.AbstractInactivityMonitor.onException(AbstractInactivityMonitor.java:314)
> at 
> org.apache.activemq.transport.AbstractInactivityMonitor$4.run(AbstractInactivityMonitor.java:215)
> at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> at java.lang.Thread.run(Thread.java:722)
> WARN | Transport Connection to: StompSocket_19548821 failed: 
> java.io.IOException
> Exception in thread "ActiveMQ InactivityMonitor Worker" 
> java.lang.NullPointerException
> at 
> org.apache.activemq.transport.AbstractInactivityMonitor.onException(AbstractInactivityMonitor.java:314)
> at 
> org.apache.activemq.transport.AbstractInactivityMonitor$4.run(AbstractInactivityMonitor.java:215)
> at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> at java.lang.Thread.run(Thread.java:722)
> For me it looks as if the StompInactivityMonitor is delivering its events to 
> the wrong Transport, i.e. it needs a "narrow()" when setting it up.



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