dovecot - Mar 2007 - imap + unmounted home disk

dovecot 0.99 still (RHEL4), I'm sorry to say.
The config is for mbox's to live on the user's home disk.
If the user tries to make an imap connection when
his home disk is unmounted, various permission denied
messages are logged, as expected, but then the imap 
process seems to hang around instead of aborting.
The result is that eventually the imap process
limit is reached, and even those users whose home
disks are correctly mounted, cant get at their mail.

Apologies if this has already been fixed - I cant
find anything relevant in the archives.

Cheers,
Terry

On 12.3.2007, at 16.40, T. Horsnell wrote:
> dovecot 0.99 still (RHEL4), I'm sorry to say.
> The config is for mbox's to live on the user's home disk.
> If the user tries to make an imap connection when
> his home disk is unmounted, various permission denied
> messages are logged, as expected, but then the imap
> process seems to hang around instead of aborting.
> The result is that eventually the imap process
> limit is reached, and even those users whose home
> disks are correctly mounted, cant get at their mail.
Check with strace what they are doing? I can't really think of  
anything why they would hang.

http://wiki.dovecot.org/Debugging/ProcessTracing
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On Mon, Mar 12, 2007 at 08:55:08PM +0200, Timo Sirainen
wrote:
> On 12.3.2007, at 16.40, T. Horsnell wrote:
> 
> >dovecot 0.99 still (RHEL4), I'm sorry to say.
> >The config is for mbox's to live on the user's home disk.
> >If the user tries to make an imap connection when
> >his home disk is unmounted, various permission denied
> >messages are logged, as expected, but then the imap
> >process seems to hang around instead of aborting.
> >The result is that eventually the imap process
> >limit is reached, and even those users whose home
> >disks are correctly mounted, cant get at their mail.
> 
> Check with strace what they are doing? I can't really think of  
> anything why they would hang.
> 
> http://wiki.dovecot.org/Debugging/ProcessTracing

[root at ls1 ~]$ strace -tt -p 17472
Process 17472 attached - interrupt to quit
21:24:52.847645 futex(0x305392f620, FUTEX_WAIT, 2, NULL) = -1 EINTR (Interrupted
system call)
21:25:14.933108 --- SIGALRM (Alarm clock) @ 0 (0) ---
21:25:14.933263 alarm(30)               = 0
21:25:14.933396 rt_sigreturn(0x1e)      = -1 EINTR (Interrupted system call)
21:25:14.933508 futex(0x305392f620, FUTEX_WAIT, 2, NULL) = -1 EINTR (Interrupted
system call)
21:25:44.937143 --- SIGALRM (Alarm clock) @ 0 (0) ---
21:25:44.937287 alarm(30)               = 0
21:25:44.937403 rt_sigreturn(0x1e)      = -1 EINTR (Interrupted system call)
21:25:44.937507 futex(0x305392f620, FUTEX_WAIT, 2, NULL) = -1 EINTR (Interrupted
system call)
21:26:14.942092 --- SIGALRM (Alarm clock) @ 0 (0) ---
21:26:14.942244 alarm(30)               = 0
21:26:14.942361 rt_sigreturn(0x1e)      = -1 EINTR (Interrupted system call)
21:26:14.942469 futex(0x305392f620, FUTEX_WAIT, 2, NULL <unfinished ...>
Process 17472 detached

Hope this is useful..
Terry.


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