In your scenario, are both consumers already connected when the messages are sent? On Sep 18, 2015 4:59 PM, "sburczymucha" <sburczymuchate...@gmail.com> wrote:
> Hello, > > I would like to know if I understand how messages are processed in > following > configuration. Supposed I have a connection with message prefetch = 5, and > folowing messages in queue: > > ID = 1, JMSXGroupID = 1 > ID = 2, JMSXGroupID = 1 > ID = 3, JMSXGroupID = 2 > ID = 4, JMSXGroupID = 1 > ID = 5, JMSXGroupID = 2 > ID = 6, JMSXGroupID = 1 > ID = 7, JMSXGroupID = 2 > ID = 8, JMSXGroupID = 1 > > Client waits for messages with JMSXGroupID = 1. Now, because message > prefetch = 5, all messages with JMSXGroupID = 1 are prefetched to client. > After that, async listener is called with message ID 1, 2, 4, 6, 8 one by > one, am I right? What happens now, when message ID = 4 is NACKed? Does > listener receives message ID 4 again (until it is sent to DLQ queue) or it > receives message Id = 6 because it is already prefetched? > > In other words, does listener behaves the same way with message prefetch = > 5 > and message prefetch = 1? > > In this configuaration (prefetch = 5, JMSXGroupID set) does prefetch has > any > impact on broker clustering? > > Thank you, best regards, > > > > -- > View this message in context: > http://activemq.2283324.n4.nabble.com/Prefetch-message-consumer-async-listener-and-message-grouping-transactions-clustering-how-does-it-wo-tp4702096.html > Sent from the ActiveMQ - User mailing list archive at Nabble.com. >
