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https://issues.apache.org/jira/browse/PROTON-2232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17119321#comment-17119321
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Robbie Gemmell commented on PROTON-2232:
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{quote}
If you keep repeating steps 2-6 then more and more "on_sender_open" messages
appear in the terminal, suggesting that there is a leak in the internals of
qpid-proton.
{quote}
I believe it actually suggests that your application is creating the additional
senders, where each time on_connection_open is called you create a new sender,
whilst the reconnect reattaches the ones you already had open, and so each time
you end up with one more sender and thus one more log message.
> on_sender_open is executed too many times after failover
> --------------------------------------------------------
>
> Key: PROTON-2232
> URL: https://issues.apache.org/jira/browse/PROTON-2232
> Project: Qpid Proton
> Issue Type: Bug
> Affects Versions: proton-c-0.30.0
> Environment: Window 10 Enterprise (64 bit), Windows Server 2016
> Standard (64 bit)
> Reporter: Attila Kun
> Priority: Major
>
> Steps to reproduce on Windows:
> # Start the app at:
> [https://github.com/attila-kun/qpid-proton-sender/blob/master/qpid-proton-sender/main.cpp]
> # In the terminal run
> {code:java}
> netsh interface portproxy add v4tov4 listenaddress=localhost listenport=8005
> connectaddress=<broker address> connectport=61616 protocol=tcp
> {code}
> (replace <broker address> with your broker's address)
> # Wait a few seconds for the app to detect the connection.
> # In the terminal run
> {code:java}
> netsh interface portproxy delete v4tov4 listenaddress=localhost
> listenport=8005 protocol=tcp
> {code}
> # Wait a few seconds for the app to detect that the connection is dropped.
> # Do step 2. again to reestablish the connection. Notice that 2 new
> instances of the message "on_sender_open" appear in the terminal (there
> should be only one new instance).
> If you keep repeating steps 2-6 then more and more "on_sender_open" messages
> appear in the terminal, suggesting that there is a leak in the internals of
> qpid-proton.
>
> Example output:
> {code:java}
> on_connection_open
> on_sender_open
> on_error: The specified network name is no longer available. - on read from
> localhost:8005 (connection aborted)
> on_connection_open
> on_sender_open
> on_sender_open
> on_error: The specified network name is no longer available. - on read from
> localhost:8005 (connection aborted)
> on_connection_open
> on_sender_open
> on_sender_open
> on_sender_open
> ...
> {code}
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