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https://issues.apache.org/jira/browse/PROTON-2900?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18007816#comment-18007816
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Timothy A. Bish commented on PROTON-2900:
-----------------------------------------

If you could please provide an AMQP frame trace of the Open exchange between 
client and broker (PN_TRACE_FRM=true) 

> `IdleTimeoutCheck` not rescheduled after broker's AMQP Open frame, causing 
> premature connection closure
> -------------------------------------------------------------------------------------------------------
>
>                 Key: PROTON-2900
>                 URL: https://issues.apache.org/jira/browse/PROTON-2900
>             Project: Qpid Proton
>          Issue Type: Bug
>          Components: protonj2
>    Affects Versions: protonj2-1.0.0-M23
>            Reporter: Marco Geri
>            Assignee: Timothy A. Bish
>            Priority: Major
>
> While testing with BrokerJ 9.2.1 with AMQP 1.0 protocol, I configured the 
> broker to request heartbeats every 5 seconds using the setting 
> {{{}qpid.port.heartbeatDelay=5{}}}.
> However, even with a simple login test (without sending any other messages), 
> the connection is closed by the broker after 10 seconds due to inactivity. It 
> appears that the client library does not send any idle (heartbeat) frames 
> during this time.
> After a quick debugging session, it seems that the {{IdleTimeoutCheck}} in 
> the {{ProtonEngine}} is scheduled immediately with a timeout of 10 seconds, 
> before the AMQP Open frame from the broker is received. The Open frame from 
> the broker specifies a 5-second idle timeout, but the {{IdleTimeoutCheck}} is 
> *not* rescheduled after this frame is processed.
> As a result, the client does not send heartbeat frames within the expected 
> timeframe, and the broker closes the connection due to inactivity.
> *Note:* I ran the test using BrokerJ version 9.2.1, which includes a fix for 
> the {{heartbeatDelay}} parameter (see QPID-8680).



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