openstack/oslo.messaging
Code Issues Proposed changes

Merge "Fix reconnect race condition with RabbitMQ cluster"

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Jenkins 2014-12-04 14:52:28 +00:00 committed by Gerrit Code Review
commit bf9fd263f9
1 changed files with 14 additions and 1 deletions
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15
oslo/messaging/_drivers/impl_rabbit.py
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@ -162,7 +162,20 @@ class ConsumerBase(object):
self.channel = channel
self.kwargs['channel'] = channel
self.queue = kombu.entity.Queue(**self.kwargs)
self.queue.declare()
try:
self.queue.declare()
except Exception as e:
# NOTE: This exception may be triggered by a race condition.
# Simply retrying will solve the error most of the time and
# should work well enough as a workaround until the race condition
# itself can be fixed.
# TODO(jrosenboom): In order to be able to match the Execption
# more specifically, we have to refactor ConsumerBase to use
# 'channel_errors' of the kombu connection object that
# has created the channel.
# See https://bugs.launchpad.net/neutron/+bug/1318721 for details.
LOG.exception(_("Declaring queue failed with (%s), retrying"), e)
self.queue.declare()
def _callback_handler(self, message, callback):
"""Call callback with deserialized message.