+++ This bug was initially created as a clone of Bug #455247 +++ With -Dprotectio=true, the java client adds a MINA filter that will block writes if there are more than N bytes of outstanding writes being held in memory. Unfortunately, this can cause deadlocks in the client because MINA only uses one thread to process all I/O (both reads and writes). The deadlock can occur when the client tries to write directly from the callback made by the MINA I/O thread. If this write attempt should block, then MINAs I/O thread will block until some outstanding writes have been made, but no more writes can ever be made because the MINA I/O thread that is supposed to do those writes is being blocked by the callback.
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2008-0867.html