I have seen portmap exit on SIGPIPE. This signal is not handled by
portmap. I have seen this when giving xterminal connections rigourous
treatment of reboot/power-off/reboot (NFS boot load)/connect, etc. Testing
has been done with HP and Tektronic xterminals and Reflection-X. I have
not tracked down the actual reason for the SIGPIPE, but I have determined
that handling SIGPIPE will solve the problem and keep portmap from exiting.
I'll have a look at it.
Fixed in portmap-4.0-34, coming soon to a Rawhide mirror near you.