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From "VIctor Perepelitsky (JIRA)" <>
Subject [jira] [Created] (AMQ-3446) Network of brokers does not pass messages when networkTTL is bigger then 1
Date Thu, 11 Aug 2011 10:23:27 GMT
Network of brokers does not pass messages when networkTTL is bigger then 1

                 Key: AMQ-3446
             Project: ActiveMQ
          Issue Type: Bug
          Components: Broker
    Affects Versions: 5.5.0, 5.4.2, 5.4.1
            Reporter: VIctor Perepelitsky 

Given 3 brokers A, B and C.
Each broker is connected to the others by a network bridge (so we have 3 brokers that are
connected to each other)
The networkTTL is 2 on all network connectors.

Start broker A and B
Subscribe consumer on A
Start Broker C
Stop Broker B
Publish message to C

Expected result:
The consumer that is subscribed on A receives the message
Actual result:
Sometimes it works and sometimes the consumer does not receive the message.

Additional info:
>From my understanding the problem appears since a broker subscribes as a consumer to other
brokers only when there is a consumer that subscribed to this broker, but it does not try
to renew subscription to other brokers when some (another) broker in its network fails (or

So we see the following situation:
Client subscribed on topic X on A, A subscribed on topic X on B, B subscribed on topic X on
When we stop B, A does not subscribe on topic X on C and the message of topic X cannot pass
from C to A.

This BUG does not occur when networkTTL is 1 because subscription route in a network will
be not be greater then 2

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