Hi Emmanuel, Thanks a lot, you find out the root cause of the problem I believe.
I created my own version of CumulativeProtocolDecoder (http://pastebin.com/m0qmbEVS) and as you suggested removed the has fragmentation check. It still doesn't accumulate, however the second package arrives without accumulating for the same session. Thanks Tunca -- View this message in context: http://apache-mina.10907.n7.nabble.com/CumulativeProtocolDecoder-and-UDP-tp18927p50287.html Sent from the Apache MINA Developer Forum mailing list archive at Nabble.com.