Which version of ActiveMQ 4 are you using? (4.x has been around for about a year now :)
Have you tried using 4.0-RC2 which has lots of bug fixes http://cvs.apache.org/repository/incubator-activemq/distributions/ James On 4/7/06, Neil. <[EMAIL PROTECTED]> wrote: > > Hi, > > I'm trying to test a fairly simple JMS publish/subscribe application using > ActiveMQ 4 with the in-built DerbyDB for queue persistence. > > I'm firing up a broker and then starting three subscribers, each listening > to a different topic. > > Next I launch a test program that publishes 3 messages, one to each topic. > > This works fine and the messages are being received. If I then run the test > program again, the messages are again found and successfully processed. > > The problem seems to occur if I launch multiple instances of the test > program at the same time, meaning there are several messages on each topic > at once. At this point I'm getting some really weird behaviour. The first > few messages are picked up, but then the consumers start to report that they > aren't finding any messages. > > Stopping and restarting the broker means that more messages will be picked > up before the consumers again say that they can't find any messages. > Repeating this process a few times will eventually get all of the messages, > but that probably won't work too well in a production set up! > > There doesn't seem to be any pattern to which messages it's finding; > sometimes it will get all of the topic 1 messages, one of the topic 2 > messages, none of the topic 3 messages... Next time through it will be a > different combination. The only consistent thing seems to be that it never > finds all of the messages. > > If I switch to using session.createConsumer() instead of > session.createDurableSubscriber then everything works fine. Unfortunately I > need the level of resilience provided by persistent messages, so I need to > find a way around this. > > Has anybody come across this sort of problem before or are there any silly > mistakes I could be making here? Any advice would be most welcome, as I'm > pulling my hair out in great clumps a t the moment! > > Thanks, > Neil > -- > View this message in context: > http://www.nabble.com/Losing-Messages-With-a-Durable-Subscriber-t1411502.html#a3801777 > Sent from the ActiveMQ - Dev forum at Nabble.com. > > -- James ------- http://radio.weblogs.com/0112098/
