[rabbitmq-discuss] How to catch RESOURCE_LOCKED exceptions in erlang client

[Geib, Mark]

I am trying to use the feature of creating exclusive queues in order to limit consumers to "one at a time" for given messages but can not see how to catch the exception I receive when the second consumer tries to declare the same queue. Everything is working as excepted but I am not sure how to prevent my gen_server from terminating. I want to catch the event, then retry, to provide a "backup" consumer.

In my log file I see:
16:18:59.011 [error] CRASH REPORT Process 'amqp_worker_con_2:1' with 0 neighbours exited with reason: {{shutdown,{server_initiated_close,405,<<"RESOURCE_LOCKED - cannot obtain exclusive access to locked queue 'q1' in vhost '/'">>}},{gen_server,call,[<0.101.0>,{call,{'queue.declare',0,<<"q1">>,false,false,true,true,false,[]},none,<0.66.0>},infinity]}} in gen_server:terminate/6 line 744

Thanks for any help,

Mark Geib
Principal Engineer
Cheyenne Software Engineering
mark.geib at echostar.com / 35-215


“We, the unwilling, led by the unknowing, are doing the impossible for the ungrateful. We have done so much, for so long, with so little, we are now qualified to do anything with nothing.” 
― Mother Teresa


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