dovecot - Sep 2007 - Assertion failure in mail-index-view-sync.c

I have been getting these assertion failures every couple days, killing 
the IMAP process.  After it happens, I can login immediately and 
everything is fine until it happens again.  Here is the log entry:

Sep 10 10:03:41 mailbox-4 dovecot: nh: IMAP(username): file 
mail-index-view-sync.c: line 666 (mail_index_view_sync_end): assertion 
failed: (view->log_file_offset >=
view->map->hdr.log_file_int_offset)
Sep 10 10:03:41 mailbox-4 dovecot: child 38458 (imap) killed with signal 6

It started after I disabled indexing for deliver and IMAP:

mail_location = maildir:~/Maildir:INDEX=MEMORY

I removed the dovecot.index* files from all of the maildir directories 
(including the root/INBOX), but that didn't help.

I have upgraded to 1.0.5, but that didn't help either.

Any ideas as to what might be causing this?

Thanks,
-Doug

Doug Council wrote:
> I have been getting these assertion failures every couple days, killing
> the IMAP process.  After it happens, I can login immediately and
> everything is fine until it happens again.  Here is the log entry:
> 
> Sep 10 10:03:41 mailbox-4 dovecot: nh: IMAP(username): file
> mail-index-view-sync.c: line 666 (mail_index_view_sync_end): assertion
> failed: (view->log_file_offset >=
view->map->hdr.log_file_int_offset)
> Sep 10 10:03:41 mailbox-4 dovecot: child 38458 (imap) killed with signal 6
> 
I've got one of these after an upgrade from 1.0rc17 to 1.0.5
> It started after I disabled indexing for deliver and IMAP:
Which I didn't do, indexing stayed the same (in fact dovecot.conf did!)

We're logging "SELECT" so I know the user had successfully opened
his
INBOX with 567 messages, then his Sent folder, then his INBOX again (568
messages) then five minutes later the crash (all in the same process).

Here's a backtrace:

#0  0xff21fc14 in _libc_kill () from /usr/lib/libc.so.1
(gdb) bt
#0  0xff21fc14 in _libc_kill () from /usr/lib/libc.so.1
#1  0xff1b598c in abort () from /usr/lib/libc.so.1
#2  0x7a2f0 in i_internal_panic_handler (
    fmt=0x97758 "file %s: line %d (%s): assertion failed: (%s)",
    args=0xffbeef18) at failures.c:403
#3  0x79ccc in i_panic (
    format=0x97758 "file %s: line %d (%s): assertion failed: (%s)")
    at failures.c:183
#4  0x611a4 in mail_index_view_sync_end (_ctx=0xc87d8)
    at ../../src/lib/array.h:81
#5  0x4e314 in index_mailbox_sync_deinit (_ctx=0xc87d0, status_r=0xffbef088)
    at index-sync.c:311
#6  0x6a61c in mailbox_sync_deinit (_ctx=0xc5c18, status_r=0xffbef088)
    at mail-storage.c:421
#7  0x29d78 in imap_sync_deinit (ctx=0xc5c08) at imap-sync.c:67
#8  0x2a1d4 in cmd_sync_continue (cmd=0xbb69c) at imap-sync.c:215
#9  0x2a2ec in cmd_sync (cmd=0xbb69c, flags=28, imap_flags=0,
    tagline=0x8c690 "OK Fetch completed.") at imap-sync.c:252
#10 0x1ee10 in cmd_fetch_finish (ctx=0xbd930) at cmd-fetch.c:103
#11 0x1f00c in cmd_fetch (cmd=0xbb69c) at cmd-fetch.c:173
#12 0x22154 in cmd_uid (cmd=0xbb69c) at cmd-uid.c:19
#13 0x22e70 in client_handle_input (cmd=0xbb69c) at client.c:344
#14 0x22df0 in client_handle_input (cmd=0xbb69c) at client.c:398
#15 0x22f8c in _client_input (context=0xbb658) at client.c:441
#16 0x80b0c in io_loop_handler_run (ioloop=0xb8230) at ioloop-poll.c:199
#17 0x80324 in io_loop_run (ioloop=0xb8230) at ioloop.c:329
#18 0x2c498 in main (argc=0, argv=0xffbef604, envp=0xffbef614) at main.c:290

Chris

-- 
--+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+-
Christopher Wakelin,                           c.d.wakelin at reading.ac.uk
IT Services Centre, The University of Reading,  Tel: +44 (0)118 378 8439
Whiteknights, Reading, RG6 2AF, UK              Fax: +44 (0)118 975 3094

On Mon, 2007-09-10 at 10:16 -0700, Doug Council wrote:
> I have been getting these assertion failures every couple days, killing 
> the IMAP process.  After it happens, I can login immediately and 
> everything is fine until it happens again.  Here is the log entry:
> 
> Sep 10 10:03:41 mailbox-4 dovecot: nh: IMAP(username): file 
> mail-index-view-sync.c: line 666 (mail_index_view_sync_end): assertion 
> failed: (view->log_file_offset >=
view->map->hdr.log_file_int_offset)
> Sep 10 10:03:41 mailbox-4 dovecot: child 38458 (imap) killed with signal 6
> 
> It started after I disabled indexing for deliver and IMAP:
I suppose it's because of that. I just tried running stress testing with
indexes disabled, but I couldn't reproduce this.

I probably could get it fixed if I looked hard enough at the code, but
I'd rather use my time to make a stable v1.1.0 release. Its indexing
code has had major changes, and this assert doesn't even exist in it
anymore.

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