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From CajunDust <>
Subject Re: JMS Bridge with static URL blocks at startup
Date Wed, 24 Nov 2010 09:33:41 GMT


I got a little further in finding some indication what's happening. My best
guess is that there are race conditions...

The problem I have is when I first create and initialize the broker ... some
time passes, and then I start the broker.
IF I immediately start the broker after creating and configuring it, it does
not block ! But nicely tells me that it cannot reach the remote broker
(loops in timeout messages). When I do start the remote broker, it connects
to it.

BUT, now a NEW problem arises.  When a JMS client ( message consumer)
connects too soon to the broker address ( < 2 sec after starting at my
machine), it does not have any connection errors, but it never receives any
messages that are posted !


SENDER 1  --->  JMS A  <- topic_x -> JMS B <--- RECEIVER 2   /  receiver 3

  - JMS A has a NetworkConnector to JMS B  - forwards  topic_x to B
  - JMS A starts prior to JMS B
  - sender 1 starts posting messages on topic_x
  - JMS B starts 
  - immediately connect receiver 2 to B, and listen on topic_x   => no
messages !
  - when, after a couple of seconds, receiver 3 connects on same topic_x, it
DOES see the incoming messages, receiver 2 is still silent !!!

I have found no way to check if 2 can receive any messages (shows no errors,
acts as normal, etc...)

Is this a possible bug ?

I have tried to run an example of their test (as posted in the reply).   It
gives the exact same behaviour :  the receiver 2 does not hear any messages
when it is started too soon after JMS B starts. 

Does anyone has the same problems ?
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