We have a multithreaded Mail Server application PMDF running
on a dual processor DEC AlphaServer 1200 running Compaq
Tru64 Unix 5.1a. The PMDF dispatcher process, which is
multithreaded and responsible for dispatching SMTP and POP3
mail transport agents, hangs occasionally on a (otherwise normal)
When PMDF displatcher process hangs, the process will not
die with a kill signal - i.e., sending kill -9 doesn't cause the
process to die.
We would like to know if anyone has seen this or can suggest
why a UNIX process would not die when sent SIGKILL.