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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Steve,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thank you very much for helping me out. I actually stop Machine A. That prevents messages from being shoveled from Machine C to A. While A is still stopped,
I restart the RabbitMQ service Machine C. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">When I do this, I figured since the messages are in a durable queue on Machine C, they would still be in the durable queue on C waiting to be shoveled to A.
This isn’t the case though—they are simply gone. They don’t make it to A (since A is stopped), but they aren’t on C anymore either. I was thinking I probably have something configured wrong or that there is a setting I can tweak to make them persist on C.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thank you again for your help on this…<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Sean<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Steve Powell [mailto:steve@rabbitmq.com]
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<b>Sent:</b> Tuesday, April 03, 2012 7:44 AM<br>
<b>To:</b> Sean Heaton<br>
<b>Cc:</b> rabbitmq-discuss@lists.rabbitmq.com<br>
<b>Subject:</b> Re: [rabbitmq-discuss] Shovel plugin behavior with durable queues...<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi Sean,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Did you mean to say you restarted Machine C or Machine A?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">In any case, the messages in a durable queue will only survive a server<o:p></o:p></p>
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<p class="MsoNormal">stop/start if the messages are persistent.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">If you restarted Machine A, then the shovel ought to reconnect (from C<o:p></o:p></p>
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<p class="MsoNormal">to A) and the messages in the queue should then be sent. Since the queue<o:p></o:p></p>
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<p class="MsoNormal">on Machine A is durable it ought to still exist when you restart it.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hope this gives some clue. If you still have problems, please come back.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span class="apple-style-span"><span style="font-size:9.0pt;font-family:"Georgia","serif";color:black">Steve Powell </span></span><span class="apple-style-span"><span style="font-size:8.5pt;font-family:"Georgia","serif";color:black">(<i>a
happy bunny</i>)</span></span><span style="font-size:13.5pt;font-family:"Georgia","serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-style-span"><i><span style="font-size:7.5pt;font-family:"Georgia","serif";color:black">----------some more definitions from the SPD----------</span></i></span><span style="font-size:9.0pt;font-family:"Helvetica","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-style-span"><b><span style="font-size:7.5pt;font-family:"Georgia","serif";color:black">chinchilla</span></b></span><span class="apple-style-span"><span style="font-size:7.5pt;font-family:"Georgia","serif";color:black"> (<i>n.</i>)
Cooling device for the lower jaw.</span></span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-style-span"><b><span style="font-size:7.5pt;font-family:"Georgia","serif";color:black">socialcast</span></b></span><span class="apple-style-span"><span style="font-size:7.5pt;font-family:"Georgia","serif";color:black"> (<i>n.</i>) Someone
to whom everyone is speaking but nobody likes.</span></span><span style="font-size:13.5pt;font-family:"Georgia","serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span class="apple-style-span"><b><span style="font-size:7.5pt;font-family:"Georgia","serif";color:black">literacy</span></b></span><span class="apple-converted-space"><span style="font-size:7.5pt;font-family:"Georgia","serif";color:black"> </span></span><span class="apple-style-span"><span style="font-size:7.5pt;font-family:"Georgia","serif";color:black">(<i>n.</i>)
A textually transmitted disease usually contracted in childhood.</span></span><span style="font-size:13.5pt;font-family:"Georgia","serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On 2 Apr 2012, at 22:33, Sean Heaton wrote:<o:p></o:p></p>
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<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Hello,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">I am new to the list and RabbitMQ in general, so I hope this is not a stupid question, but I have seen some behavior that is strange to me when using the RabbitMQ shovel
plugin. I am using RabbitMQ v 2.7.1 running on Centos 6.0. I have three machines in my setup. Machines A and B are both clustered together. Machine C is not part of the cluster. It has the shovel plugin installed. The plugin is set up to shovel messages
from a durable queue on Machine C to a durable queue on Machine A. In case it helps, my /etc/rabbitmq/rabbitmq.conf file looks like this:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">[{rabbitmq_shovel,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> [{shovels,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> [{myShovel,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> [{sources, [{broker,"<a href="amqp://MachineC">amqp://MachineC</a>"}]},<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> {destinations, [{broker, "<a href="amqp://MachineA">amqp://MachineA</a>"}]},<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> {queue, <<"myQueue">>},<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> {ack_mode, on_confirm},<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> {publish_properties, [{delivery_mode, 2}]},<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> {reconnect_delay, 5}<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> ]<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> }]<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> }]<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">}].<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">With this configuration, everything seems to work fine. When I send messages to the queue on Machine C, they are shoveled automatically out to A.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">So here is the weird behavior I mentioned earlier… If I shut down the RabbitMQ service on Machine A, messages stack up in the durable queue on Machine C. This is expected
since Machine A is down. However, if I then restart the RabbitMQ service on Machine C, all of the messages waiting in the durable queue get nuked.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Has anyone else seen this behavior? Do I have a setting wrong or is there something else I can change so that this doesn’t happen?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Thanks in advance for your help!<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Regards,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Sean<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:13.5pt;font-family:"Georgia","serif""><br clear="all">
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<p class="MsoNormal"><o:p> </o:p></p>
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