Yes, we use XA transactions. I don´t think that the NIO mixes this up somehow. We can run our system with a standalone ActiveMQ using tcp or nio but also in an embedded mode inside Wildfly using the VM protocol.
I just run our tests again with the enableAckCompaction set to false for the kahaDB - it looked a lot better as we now only have a few message sends taking ~10ms or ~20ms (which is also a long time...) but no send took longer than that. I´ll have further tests in that direction and will keep this post updated. Thanks -- Sent from: http://activemq.2283324.n4.nabble.com/ActiveMQ-User-f2341805.html
