[Dovecot] imap + unmounted home disk

[T. Horsnell]

On Mon, Mar 12, 2007 at 11:55:13PM +0200, Timo Sirainen wrote:
> On Mon, 2007-03-12 at 21:26 +0000, T. Horsnell wrote:
> > [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)
> 
> > Hope this is useful..
> 
> Hmm. Not really. Dovecot doesn't use threads, so I can't think of why it
> would be waiting for a futex. What does gdb backtrace show?
> 
> gdb attach 17472
> bt
> 
> Anyway it looks like it's not running in Dovecot's code at all, but
> somewhere inside libc or something..

Looks like you're right. Please dont waste any time on this, I thought
it might be relevant to the latest stuff. I hope to upgrade soon...

Thanks,
Terry.

[root at ls1 ~]$ gdb attach 17472
GNU gdb Red Hat Linux (6.3.0.0-1.63rh)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu"...attach: No such file or directory.

Attaching to process 17472
Reading symbols from /usr/libexec/dovecot/imap...(no debugging symbols found)...done.
Using host libthread_db library "/lib64/tls/libthread_db.so.1".
Reading symbols from /lib64/libdl.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/libdl.so.2
Reading symbols from /lib64/tls/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib64/tls/libc.so.6
Reading symbols from /lib64/ld-linux-x86-64.so.2...
(no debugging symbols found)...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /lib64/libnss_files.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/libnss_files.so.2

0x00000030537d11bb in __lll_mutex_lock_wait () from /lib64/tls/libc.so.6
(gdb) bt
#0  0x00000030537d11bb in __lll_mutex_lock_wait () from /lib64/tls/libc.so.6
#1  0x00000000005742c0 in ?? ()
#2  0x0000000000000001 in ?? ()
#3  0x000000305376d1c3 in posix_memalign () from /lib64/tls/libc.so.6
#4  0x0000004b00000000 in ?? ()
#5  0xffffffffffffffff in ?? ()
#6  0x0000000000000000 in ?? ()
(gdb) The program is running.  Quit anyway (and detach it)? (y or n) y
Detaching from program: /usr/libexec/dovecot/imap, process 17472
[root at ls1 ~]$ file /usr/sbin/dovecot
/usr/sbin/dovecot: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.4.0, dynamically linked (uses shared libs), stripped
[root at ls1 ~]$



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