Is your subscriber slow by any chance and not keeping up with the rate at which msgs get produced? The topic subscription inside the broker then fills up with msgs until you hit a configured memory limit. Once the limit is hit, producer flow control kicks in and stops the producer until enough msgs got consumed to continue.
I bet producer flow control is kicking in. After some time producer should resume. Also, try a slower producer rate to verify this. Hope this helps. Torsten Mielke FuseSource tmielke.blogspot.com
