Hi Emmanuel, I downloaded apache mina 2.0.13 and updated NioDatagramSession METADATA creation code. Set the 4th parameter to true, then for UDP CumulativeProtocolDecoder started to work as expected.
Thanks A lot. class NioDatagramSession extends NioSession { static final TransportMetadata METADATA = new DefaultTransportMetadata("nio", "datagram", true, true, InetSocketAddress.class, DatagramSessionConfig.class, IoBuffer.class); -- View this message in context: http://apache-mina.10907.n7.nabble.com/CumulativeProtocolDecoder-and-UDP-tp18927p50289.html Sent from the Apache MINA Developer Forum mailing list archive at Nabble.com.