Bug#324900: nscd: umount /var fails (unclean shutdowns)
At Fri, 26 Aug 2005 11:52:30 +0200,
Zlatko Calusic wrote:
> No file-rc, and no long running (bash or other) processes. Here's
> process list just before /etc/init.d/umountfs runs the umount command,
> with only kernel daemons removed (they're not interesting, and too
> many of them):
>
> UID PID PPID C STIME TTY TIME CMD
> root 1 0 0 12:42 ? 00:00:00 init [6]
> root 1119 1 0 12:47 ? 00:00:00 /bin/sh /etc/init.d/rc 6
> root 1421 1119 0 12:47 ? 00:00:00 /bin/sh /etc/rc6.d/S40umountfs stop
> root 1424 1421 0 12:47 ? 00:00:00 ps -ef
>
> As you can see, we have just init, bash that has just spawned
> /etc/init.d/rc (from initscripts), and rc has reached S40umountfs in
> runlevel 6.
>
> The real question would be, how in the hell rc managed to have
> /var/db/nscd/passwd mapped, when nscd has exited long ago. Even bigger
> mistery happens when I disable persistent cache, than rc somehow
> "inherits" file descriptor (or was it also file mapping?) to a deleted
> file in /var/run?!
>
> rc 1119 root mem REG 8,9 217016 228931 /var/db/nscd/passwd
It's very weird behavior. Please disable nscd when your boot up time,
and then run /etc/init.d/nscd. You can see which processes have such
nscd file descriptor (fd), and you can clear process inheritance with
pstree easily. If nothing has nscd fd, we can clear rc behaves oddly.
Regards,
-- gotom
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