Oracle Solution for Error ora-09763

ORA-09763: osnmpx: send/receive error exchanging Mach ports.

What triggered the Error:

The Mach driver failed to exchange port information with the other side of the connection. Either msg_send (sercose[0] == 1) or msg_receive (sercose[0] == 2) failed.

What should we do to fix it:

Check return code in sercerrno. Make sure both sides of the connection are still running.