[QPID-4378] C++ Broker deletes dynamic bridges too aggressively

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.18
• Fix Version/s: 0.19
• Component/s: C++ Broker

Environment

C++ Broker

• Assignee: Charles E. Rolke
• Reporter: Charles E. Rolke
• Created: 18/Oct/12 20:05
• Updated: 29/Jul/13 18:53
• Resolved: 18/Oct/12 20:40

Description

If a dynamic bridge's session has been detached while attempting to propagate a binding event, the broker will delete the bridge. Normally, a detached bridge session will be automatically recovered during the maintenance periodic if possible. Needless to say, auto-deleting the bridge upon a session error prevents this normal recovery path from occurring.

This event can occur in a production system during broker startup/federation and also during source broker recovery since there is a potential race condition between creation of the source exchange and the creation of the dynamic bridge on the destination broker.

Log Message:
Sep 30 19:41:40 localhost qpidd[10497]: 2012-09-30 19:41:40 [Broker] error Cannot propagate binding for dynamic bridge as session has been detached, deleting dynamic bridge

Steps to reproduce:

1. src broker: localhost:5801
2. dst broker: localhost:5803
   #
3. Create exchange in dst broker
   #
   qpid-config -b localhost:5803 add exchange topic fed.topic

#

1. create dynamic bridge
   #
   qpid-route dynamic add localhost:5803 localhost:5801 fed.topic

#

1. create dst queue as bind target
   #
   qpid-config -b localhost:5803 add queue fed.topic.queue

#

1. create binding on dest exchange
   #
   qpid-config -b localhost:5803 bind fed.topic fed.topic.queue
   qpid-config -b localhost:5803 unbind fed.topic fed.topic.queue

1. The unbind should not delete the bridge.