When creating sessions for your subscribers, what ack mode (AUTO, CLIENT, or DUPS_OK) are you using and are your sessions transacted?
Joe Get a free ActiveMQ user guide @ http://www.ttmsolutions.com Rick Blair wrote: > > Hi all, > > I am using ActiveMQ version 5.1 in a pub/sub system. The broker is > embedded > with the publishers. The publishers publish to 2 main topics with > selectors. I have many subscribers distributed on the network. The > subscriptions are based on the selectors. The messages are object > messages. > > During execution one subscriber(not always the same one) seems to stop > sending acks. > > In the subscriber I still see the onMessage method call being called. > However on the broker, using jconsole looking at the subscription, the > number of messages waiting for ack = the prefetch size and the number of > queued messages increases. > > This goes on until the broker memory limit hits 100% and all message > flow > stops. > > We have tried to set the policies that discard older messages, but that > did > not help. The message discard count does increase to a point, then > remains > constant, while the enqueue count still increases. Also at this time many > of the stats go negative. This very often occurs right after startup > under > heavy load on the producers. Thread dumps show no threads blocked, the > CPU > is not heavily loaded. GC does not seem to an issue. > > Any suggestions? > > -- > Tìoraidh! > > Rick > > > -- View this message in context: http://www.nabble.com/Problem-with-losing-acks%28-%29-tp19934087p19947672.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
