[Dovecot] IMAP: Disconnected: BUG: Unknown internal error (Dovecot 1.0.3)

[Robert Tomanek]

Hi,

Sunday, September 2, 2007, 20:24:04, you wrote:
>  I am getting the following error in the server mail logfile:
>> Sep  2 18:39:44 h648123 dovecot: IMAP(<account>)(<PID>): Disconnected: BUG:
>> Unknown internal error
>  I am running Dovecot 1.0.3 (compiled from sources) on Suse 9.3.

 I did one more thing: using gdb I attached to all 'imap' processes
 and set a breakpoint at the only place in the code where "Unknown
 internal error" appears (that is 'index_storage_get_last_error' in
 lib-storage/index/index-storage.c) in order to get backtrace for it
 (which may or may not help). See for yourselves:

> (gdb) break index-storage.c:452
> Breakpoint 1 at 0x807eec7: file index-storage.c, line 452.
> (gdb) continue
> Continuing.
> 
> Breakpoint 1, index_storage_get_last_error (storage=0x80cca90, syntax_error_r=0x0, temporary_error_r=0xbffff8ef)
>     at index-storage.c:452
> 452                     *temporary_error_r = TRUE;
> (gdb) bt full
> #0  index_storage_get_last_error (storage=0x80cca90, syntax_error_r=0x0, temporary_error_r=0xbffff8ef)
>     at index-storage.c:452
> No locals.
> #1  0x08097765 in mail_storage_get_last_error (storage=0x0, syntax_error_r=0xbffff8ee, temporary_error_r=0xbffff8ef)
>     at mail-storage.c:345
> No locals.
> #2  0x080573b1 in cmd_fetch_finish (ctx=<value optimized out>) at cmd-fetch.c:90
>         storage = (struct mail_storage *) 0x80cca90
>         error = <value optimized out>
>         syntax = false
>         temporary_error = 8
>         cmd = (struct client_command_context *) 0x80ccdbc
>         ok_message = 0x80b395b "OK Fetch completed."
> #3  0x08057623 in cmd_fetch (cmd=0x80ccdbc) at cmd-fetch.c:173
>         client = (struct client *) 0x80ccd78
>         ctx = (struct imap_fetch_context *) 0x80cf010
>         args = <value optimized out>
>         search_arg = (struct mail_search_arg *) 0x80cefd8
>         messageset = <value optimized out>
>         ret = <value optimized out>
> #4  0x0805a0de in cmd_uid (cmd=0x80ccdbc) at cmd-uid.c:19
>         cmd_name = 0x80cd078 "FETCH"
> #5  0x0805a616 in client_handle_input (cmd=0x80ccdbc) at client.c:335
>         client = (struct client *) 0x80ccd78
> #6  0x0805a73a in client_handle_input (cmd=0x80ccdbc) at client.c:389
>         client = (struct client *) 0x80ccd78
> #7  0x0805ac4c in _client_input (context=0x80ccd78) at client.c:432
>         client = (struct client *) 0x80ccd78
>         cmd = (struct client_command_context *) 0x80ccdbc
>         ret = 2
> #8  0x080aa441 in io_loop_handler_run (ioloop=0x80cb9b0) at ioloop-epoll.c:203
>         ctx = (struct ioloop_handler_context *) 0x80cb9d8
>         list = (struct io_list *) 0x80ccf48
>         io = (struct io *) 0x80ccf28
>         tv = {tv_sec = 0, tv_usec = 927459}
>         events_count = 4
>         t_id = 2
>         msecs = <value optimized out>
>         ret = 1
>         i = 0
>         j = 0
>         call = <value optimized out>
> #9  0x080a9889 in io_loop_run (ioloop=0x80cb9b0) at ioloop.c:329
> No locals.
> #10 0x08062087 in main (argc=1, argv=0xbffffaf4, envp=0xbffffafc) at main.c:290
>         plugin_dir = <value optimized out>

 Any thoughts here?

 One more piece of info that might (?) be interesting -- I have just
 run a grep on historical logs and it seems the bug never occured on
 previous versions of Dovecot I had been running in the past (first
 it was stock Suse 9.3 Dovecot 0.99.14, then a self-compiled
 1.0.rc27).

 The only difference (apart from the actual source code, of course)
 between 1.0.rc27 and the current 1.0.3 that might play any role are
 the configure flags:
 - 1.0.rc27: ./configure --with-pam
 - 1.0.3   : ./configure --with-ioloop=best --with-ldap --with-sql
                 --with-mysql --with-pam
 This resulted in using epoll() for 1.0.3 and poll() for 1.0.rc27;
 both versions are using dnotify.

 BTW, 'uname -a' returns:
 Linux h648123 2.6.11.4-21.9-default #1 Fri Aug 19 11:58:59 UTC 2005 i686 athlon i386 GNU/Linux
 
-- 
Best regards,
 Robert Tomanek                           mailto:rth23 at poczta.onet.pl