yea, but exclusive consumer should sort that. 2009/8/7 jerdavis <jerda...@speakeasy.net>
> > > I guess the edge case I'm thinking about is the Plain ol Single Consumer > that crashes. If my crashed program quickly restarts, and starts consuming, > I bet the broker would think there are two consumers (until TCP timeouts > etc) > > Many thanks to all, I can sleep better now. > -JD > > > > Gary Tully wrote: > > > > total ordering is only an issue when there are multiple consumers. > > For a single consumer and for exclusive consumers, where there can only > be > > a > > single consumer, ordering 'is' guaranteed. > > > > 2009/8/6 jerdavis <jerda...@speakeasy.net> > > > >> > >> Thanks for your answer Rob, this is exactly what I was looking for. :) > >> Total Ordering seems like such a fundamental thing for a Persistent > >> Queue. > >> I'm surprised there hasn't been a solid answer to this question. Is > there > >> a > >> standard way people get around this? > >> Would an Exclusive Consumer guarantee Total Order? > >> I would think that a new Exclusive consumer wouldn't be able to consume > >> messages until the crashed TCP connection/consumer finally closed and > >> released the outstanding messages. > >> > >> Regards, > >> -JD > >> > >> > >> > >> > >> > >> > >> rajdavies wrote: > >> > > >> > > >> > On 5 Aug 2009, at 23:13, jerdavis wrote: > >> > > >> >> > >> >> No takers? > >> >> -- > >> >> View this message in context: > >> >> > >> > http://www.nabble.com/Total-Message-Order-of-Queues-%28not-topics%29-durring-edge-cases%28crashes%29-tp24705154p24837185.html > >> >> Sent from the ActiveMQ - User mailing list archive at Nabble.com. > >> >> > >> > > >> > > >> > Total ordering may be violated for consumer crashes with the default > >> > prefetch sizes - see > >> > http://activemq.apache.org/what-is-the-prefetch-limit-for.html > >> > to reduce this possibility to a single message - set a prefetch size > >> > = 0. > >> > > >> > cheers, > >> > > >> > Rob > >> > > >> > Rob Davies > >> > I work here: http://fusesource.com > >> > My Blog: http://rajdavies.blogspot.com/ > >> > I'm writing this: http://www.manning.com/snyder/ > >> > > >> > > >> > > >> > > >> > > >> > > >> > >> -- > >> View this message in context: > >> > http://www.nabble.com/Total-Message-Order-of-Queues-%28not-topics%29-durring-edge-cases%28crashes%29-tp24705154p24855824.html > >> Sent from the ActiveMQ - User mailing list archive at Nabble.com. > >> > >> > > > > > > -- > > http://blog.garytully.com > > > > Open Source Integration > > http://fusesource.com > > > > > > -- > View this message in context: > http://www.nabble.com/Total-Message-Order-of-Queues-%28not-topics%29-durring-edge-cases%28crashes%29-tp24705154p24868142.html > Sent from the ActiveMQ - User mailing list archive at Nabble.com. > > -- http://blog.garytully.com Open Source Integration http://fusesource.com
