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From riteshtijoriwala <riteshtijoriw...@yahoo.com>
Subject How to preserve order of messages in Network of Brokers?
Date Sun, 03 May 2009 07:30:16 GMT

I have two consumers C1 and C2 and two brokers B1 and B2 that see each other.
I have one producer P1.

P1 is connected initially to B1 and C2 is connected to B1. C1 is connected
to B2. The initial start is as follows:

P1 produces 1, 2, 3, 4, 5, 6, (B1 failed),  7, 8, 9, 10.
C1 gets 1, 3, 5, 7, 9, 8
C2 gets 2, 4, 6, (B1 failed), 10

As seen above, I fail B1. P1 and C2 failover to B2. But now the strange
things happen. C1 starts to get messages out of order. Is there a way to
prevent this? How can I ensure that in case of broker failure, after
failover has occurred, consumers will receive messages in order.

To be specific, how can I assure that msg # 8 is processed before message #
9 & 10?


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