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<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">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></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">[{rabbitmq_shovel,<o:p></o:p></p>
<p class="MsoNormal"> [{shovels,<o:p></o:p></p>
<p class="MsoNormal"> [{myShovel,<o:p></o:p></p>
<p class="MsoNormal"> [{sources, [{broker,"amqp://MachineC"}]},<o:p></o:p></p>
<p class="MsoNormal"> {destinations, [{broker, "amqp://MachineA"}]},<o:p></o:p></p>
<p class="MsoNormal"> {queue, <<"myQueue">>},<o:p></o:p></p>
<p class="MsoNormal"> {ack_mode, on_confirm},<o:p></o:p></p>
<p class="MsoNormal"> {publish_properties, [{delivery_mode, 2}]},<o:p></o:p></p>
<p class="MsoNormal"> {reconnect_delay, 5}<o:p></o:p></p>
<p class="MsoNormal"> ]<o:p></o:p></p>
<p class="MsoNormal"> }]<o:p></o:p></p>
<p class="MsoNormal"> }]<o:p></o:p></p>
<p class="MsoNormal">}].<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">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></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">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></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">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></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks in advance for your help!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Sean<o:p></o:p></p>
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