unable to kill process, user can't login

From: Gérard Henry (ghenry@cmi.univ-mrs.fr)
Date: Tue Jan 16 2007 - 12:54:26 EST


hello all,
on a sunray server S10U3, a user can't login and there are these processes:

v210-root% ps -fu userA
      UID PID PPID C STIME TTY TIME CMD
    userA 16755 1 0 - ? 32:58 <defunct>
    userA 16722 1 0 Jan 15 ? 7:47
/usr/local/thunderbird/thunderbird-bin
    userA 16656 1 0 - ? 0:00 <defunct>
    userA 16658 16656 0 - ? 0:53 <defunct>
    userA 19636 1 0 Jan 15 pts/11 0:09 dtmail -t
    userA 19639 1 0 Jan 15 pts/11 0:00 dtfile -noview

pkill -9 userA don't work
preap <pid> either

i'm unable to do "su - userA"
v210-root% truss su - userA
...
setgroups(2, 0x0003C3E0) = 0
setuid(873) = 0
chdir("/home/userA") (sleeping...)

but others users can login without trouble on this machine.

Any idea how to kill these processes without rebooting?

thanks in advance,

gerard
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