Ralf, you're seeing the same panic I've been going back and forth with Timo on for the last two weeks. Do you think you could run a couple of quick gdb commands? Timo asked me for these last week, but I thought it might be useful if they came from you as well for comparison. It also looks like you have optimization turned off which is great for debugging.

From Timo...

Could you do in gdb something like:

fr 6 (or whatever frame gives usable results)
p *rec
p count
p *recs[0]
p *recs[1]
p *recs[..up until count-1]

If count is large, the main things I want to know are:

1) Is the array sorted (recs[n]->uid < recs[n+1]->uid always)?

2) is rec->uid anywhere in the recs array?



On 01/04/2010 05:09 AM, Ralf Hildebrandt wrote:
> From the log:

Jan  3 20:26:07 postamt dovecot: IMAP(nixxxxx): copy: uid=3526, dest=Deleted 
Messages, msgid=<dc8a4be5-41a0-4240-8f07-090e95414...@charite.de>, size=2726
Jan  3 20:26:07 postamt dovecot: IMAP(nixxxxx): delete: uid=3526, 
msgid=<dc8a4be5-41a0-4240-8f07-090e95414...@charite.de>
Jan  3 20:26:11 postamt dovecot: IMAP(nixxxxx): expunge: uid=3526, 
msgid=<dc8a4be5-41a0-4240-8f07-090e95414...@charite.de>, size=2726
Jan  3 20:26:42 postamt dovecot: IMAP(nixxxxx): copy: uid=415, box=Deleted Messages, 
dest=INBOX, 
msgid=<d539ffeb1001030758n1acc33c1m1fc67e0f1d227...@mail.gmail.com>, size=3604
Jan  3 20:26:42 postamt dovecot: IMAP(nixxxxx): 
/home/n/i/nixxxxx/Maildir/dovecot-uidlist: Duplicate file entry at line 1:
1262534293.M822904P8880.postamt.charite.de,S=3604,W=3690:2,RSaf (uid 3528 ->  
3531)
Jan  3 20:26:42 postamt dovecot: IMAP(nixxxxx): Panic: file maildir-uidlist.c: 
line 403 (maildir_uidlist_records_array_delete):
assertion failed: (pos != NULL)
Jan  3 20:26:42 postamt dovecot: IMAP(nixxxxx): Raw backtrace: imap [0x80f1631] ->  
imap [0x80f16a2] ->  imap [0x80f1019] ->  imap
[0x8088fa6] ->  imap(maildir_uidlist_refresh+0x9e9) [0x8089fc9] ->  imap [0x8086704] 
->  imap(maildir_storage_sync_init+0x125) [0x8086be5] ->
imap(imap_sync_init+0x54) [0x8070434] ->  imap [0x8062aa2] ->  imap [0x80a619c] -> 
 imap(io_loop_handle_timeouts+0xe9) [0x80f9959] ->
imap(io_loop_handler_run+0x82) [0x80fa222] ->  imap(io_loop_run+0x20) [0x80f96f0] 
->  imap(main+0x5d2) [0x8070f52] ->
/lib/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb75bcb55] ->  imap 
[0x80602d1]
Jan  3 20:26:42 postamt dovecot: IMAP(nixxxxx): delete: uid=415, box=Deleted 
Messages, msgid=<d539ffeb1001030758n1acc33c1m1fc67e0f1d227...@mail.gmail.com>
Jan  3 20:26:42 postamt dovecot: IMAP(nixxxxx): expunge: uid=415, box=Deleted 
Messages, msgid=<d539ffeb1001030758n1acc33c1m1fc67e0f1d227...@mail.gmail.com>, 
size=3604
Jan  3 20:26:45 postamt dovecot: IMAP(nixxxxx): Disconnected: Logged out 
bytes=63917/47203
Jan  3 20:26:45 postamt dovecot: IMAP(nixxxxx): Disconnected: Logged out 
bytes=360/168380
Jan  3 20:26:45 postamt dovecot: IMAP(nixxxxx): Disconnected: Logged out 
bytes=670290/672304


GNU gdb (GDB) 7.0-debian
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i486-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/local/libexec/dovecot/imap...done.
Reading symbols from /lib/i686/cmov/libdl.so.2...Reading symbols from 
/usr/lib/debug/lib/i686/cmov/libdl-2.10.2.so...done.
(no debugging symbols found)...done.
Loaded symbols for /lib/i686/cmov/libdl.so.2
Reading symbols from /lib/i686/cmov/librt.so.1...Reading symbols from 
/usr/lib/debug/lib/i686/cmov/librt-2.10.2.so...done.
(no debugging symbols found)...done.
Loaded symbols for /lib/i686/cmov/librt.so.1
Reading symbols from /lib/i686/cmov/libc.so.6...Reading symbols from 
/usr/lib/debug/lib/i686/cmov/libc-2.10.2.so...done.
(no debugging symbols found)...done.
Loaded symbols for /lib/i686/cmov/libc.so.6
Reading symbols from /lib/ld-linux.so.2...Reading symbols from 
/usr/lib/debug/lib/ld-2.10.2.so...done.
(no debugging symbols found)...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /lib/i686/cmov/libpthread.so.0...Reading symbols from 
/usr/lib/debug/lib/i686/cmov/libpthread-2.10.2.so...done.
(no debugging symbols found)...done.
Loaded symbols for /lib/i686/cmov/libpthread.so.0
Reading symbols from /usr/local/lib/dovecot/imap/lib10_quota_plugin.so...done.
Loaded symbols for /usr/local/lib/dovecot/imap/lib10_quota_plugin.so
Reading symbols from 
/usr/local/lib/dovecot/imap/lib11_imap_quota_plugin.so...done.
Loaded symbols for /usr/local/lib/dovecot/imap/lib11_imap_quota_plugin.so
Reading symbols from /usr/local/lib/dovecot/imap/lib11_trash_plugin.so...done.
Loaded symbols for /usr/local/lib/dovecot/imap/lib11_trash_plugin.so
Reading symbols from 
/usr/local/lib/dovecot/imap/lib20_autocreate_plugin.so...done.
Loaded symbols for /usr/local/lib/dovecot/imap/lib20_autocreate_plugin.so
Reading symbols from /usr/local/lib/dovecot/imap/lib20_fts_plugin.so...done.
Loaded symbols for /usr/local/lib/dovecot/imap/lib20_fts_plugin.so
Reading symbols from 
/usr/local/lib/dovecot/imap/lib20_mail_log_plugin.so...done.
Loaded symbols for /usr/local/lib/dovecot/imap/lib20_mail_log_plugin.so
Reading symbols from /usr/local/lib/dovecot/imap/lib20_zlib_plugin.so...done.
Loaded symbols for /usr/local/lib/dovecot/imap/lib20_zlib_plugin.so
Reading symbols from /usr/lib/libz.so.1...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /lib/libbz2.so.1.0...(no debugging symbols found)...done.
Loaded symbols for /lib/libbz2.so.1.0
Reading symbols from 
/usr/local/lib/dovecot/imap/lib21_fts_squat_plugin.so...done.
Loaded symbols for /usr/local/lib/dovecot/imap/lib21_fts_squat_plugin.so
Reading symbols from /lib/libgcc_s.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/libgcc_s.so.1
Core was generated by `imap [nixxxxx 87.162.56.10]'.
Program terminated with signal 6, Aborted.
#0  0xb7708424 in __kernel_vsyscall ()
#0  0xb7708424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb75d08e0 in *__GI_raise (sig=6)
     at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
         resultvar =<value optimized out>
         pid = -1217490956
         selftid = 25023
#2  0xb75d3e15 in *__GI_abort () at abort.c:88
         act = {__sigaction_handler = {sa_handler = 0x9505708,
             sa_sigaction = 0x9505708}, sa_mask = {__val = {3219827960,
               135197034, 3077474016, 0, 3219828080, 3219828068, 128, 0, 0,
               3219828144, 3077727856, 134566866, 549, 0, 0, 0, 1, 135270350,
               128, 1, 3219828068, 156260072, 69, 3219828196, 3219828040,
               135198630, 156260653, 3219828068, 3219828072, 550, 156260104,
               3076940867}}, sa_flags = 550,
           sa_restorer = 0x8106dd9<write_full+57>}
         sigs = {__val = {32, 0<repeats 31 times>}}
#3  0x080f1645 in default_fatal_finish (type=<value optimized out>, status=0)
     at failures.c:160
         backtrace = 0x95052d8 "imap [0x80f1631] ->  imap [0x80f16a2] ->  imap [0x80f1019] -> 
 imap [0x8088fa6] ->  imap(maildir_uidlist_refresh+0x9e9) [0x8089fc9] ->  imap [0x8086704] ->  
imap(maildir_storage_sync_init+0x125) [0x8086be5]"...
#4  0x080f16a2 in i_internal_fatal_handler (type=LOG_TYPE_PANIC, status=0,
     fmt=0x8109e2c "file %s: line %d (%s): assertion failed: (%s)",
     args=0xbfeaae44 ":\355\020\b\223\001") at failures.c:443
No locals.
#5  0x080f1019 in i_panic (
     format=0x8109e2c "file %s: line %d (%s): assertion failed: (%s)")
     at failures.c:207
No locals.
#6  0x08088fa6 in maildir_uidlist_records_array_delete (uidlist=0x951b0b0,
     rec=0x9534500) at maildir-uidlist.c:403
         recs = 0x9536fa0
         __PRETTY_FUNCTION__ = "maildir_uidlist_records_array_delete"
#7  0x08089fc9 in maildir_uidlist_next (uidlist=0x951b0b0)
     at maildir-uidlist.c:544
         rec = 0x95346b8
         uid = 3531
#8  maildir_uidlist_update_read (uidlist=0x951b0b0) at maildir-uidlist.c:741
         storage = 0x950f4b8
         orig_uid_validity = 1186140978
         fd = 14
         orig_next_uid = 3531
         input = 0x95347a0
         st = {st_dev = 65024, __pad1 = 0, __st_ino = 5228663, st_mode = 33152,
           st_nlink = 1, st_uid = 50357, st_gid = 100, st_rdev = 0, __pad2 = 0,
           st_size = 763, st_blksize = 4096, st_blocks = 8, st_atim = {
             tv_sec = 1262546767, tv_nsec = 269770575}, st_mtim = {
             tv_sec = 1262546802, tv_nsec = 221806856}, st_ctim = {
             tv_sec = 1262546802, tv_nsec = 221806856}, st_ino = 5228663}
         last_read_offset = 693
#9  maildir_uidlist_refresh (uidlist=0x951b0b0) at maildir-uidlist.c:889
         i = 0
         retry =<value optimized out>
         ret =<value optimized out>
#10 0x08086704 in have_recent_messages (ctx=0x9505210, forced=false,
     find_uid=0x0, lost_files_r=0xbfeaaffb) at maildir-sync.c:659
         hdr =<value optimized out>
#11 maildir_sync_get_changes (ctx=0x9505210, forced=false, find_uid=0x0,
     lost_files_r=0xbfeaaffb) at maildir-sync.c:679
         flags =<value optimized out>
#12 maildir_sync_context (ctx=0x9505210, forced=false, find_uid=0x0,
     lost_files_r=0xbfeaaffb) at maildir-sync.c:714
         sync_flags =<value optimized out>
         flags = 135325664
         new_changed =<value optimized out>
         cur_changed =<value optimized out>
         lock_failure =<value optimized out>
         fname = 0x9515030 "/home/n/i/nixxxxx/Maildir"
         ret =<value optimized out>
         __PRETTY_FUNCTION__ = "maildir_sync_context"
#13 0x08086be5 in maildir_storage_sync_init (box=0x9514e98, flags=0)
     at maildir-sync.c:924
         _data_stack_cur_id = 4
         ctx = 0x9505210
         lost_files =<value optimized out>
         ret = 0
         __PRETTY_FUNCTION__ = "maildir_storage_sync_init"
#14 0x08070434 in imap_sync_init (client=0x950fba0, box=0x9514e98,
     imap_flags=0, flags=0) at imap-sync.c:146
         ctx = 0x95191a0
         __PRETTY_FUNCTION__ = "imap_sync_init"
#15 0x08062aa2 in idle_sync_now (box=<value optimized out>, ctx=0x950feb8)
     at cmd-idle.c:127
         __PRETTY_FUNCTION__ = "idle_sync_now"
#16 0x080a619c in notify_delay_callback (ibox=0x9514e98)
     at index-mailbox-check.c:49
No locals.
#17 0x080f9959 in io_loop_handle_timeouts_real (ioloop=0x950d9b0)
     at ioloop.c:313
         item = 0x9563c78
         tv = {tv_sec = 0, tv_usec = 0}
         tv_call = {tv_sec = 1262546802, tv_usec = 336801}
         t_id = 3
#18 io_loop_handle_timeouts (ioloop=0x950d9b0) at ioloop.c:324
         _data_stack_cur_id = 2
#19 0x080fa222 in io_loop_handler_run (ioloop=0x950d9b0) at ioloop-epoll.c:180
         ctx = 0x950dab8
         event =<value optimized out>
         list =<value optimized out>
         io =<value optimized out>
         tv = {tv_sec = 0, tv_usec = 108829}
         t_id =<value optimized out>
         msecs = 109
         ret = 0
         i =<value optimized out>
         j =<value optimized out>
         call =<value optimized out>
#20 0x080f96f0 in io_loop_run (ioloop=0x950d9b0) at ioloop.c:335
No locals.
#21 0x08070f52 in main (argc=) at main.c:327
No locals.
$1 = {prev = 0x0, next = 0x0, client = 0x950fba0, pool = 0x950fe18,
   tag = 0x950fea8 "104.6", name = 0x950feb0 "IDLE", args = 0x0,
   cmd_flags = 10, func = 0x80628b0<cmd_idle_continue>, context = 0x950feb8,
   module_contexts = {arr = {buffer = 0x950fe70, element_size = 4},
     v = 0x950fe70, v_modifiable = 0x950fe70}, parser = 0x9512620,
   state = CLIENT_COMMAND_STATE_WAIT_INPUT, sync = 0x0, uid = 0, cancel = 0,
   param_error = 0, search_save_result = 0, temp_executed = 0}
(gdb) quit

----- End forwarded message -----



--
================================
David Halik
System Administrator
OIT-CSS Rutgers University
dha...@jla.rutgers.edu
================================

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