anonymous wrote : We can aways calculate how many bytes we need to send any of our packets. On ClientMessages, we just get the getEncodeSize(), and add a few bytes You're right to a certain degree, however different transport implementations may write some objects to their internal buffers slightly differently, i.e strings, utf etc. but yes we could make an educated guess as to the size of buffer we need. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4172597#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...