[Dovecot] 1.2rc5 Panic: file virtual-sync.c

[e-frog]

e-frog wrote:
> Timo Sirainen schrieb:
>> On Sat, 2009-06-06 at 16:18 +0200, e-frog wrote:
>>> Jun  6 14:40:19 server dovecot: IMAP(user): Panic: file virtual-sync.c: line 502
>>> 	(virtual_sync_mailbox_box_remove): assertion failed: (rec_count >= uid_count)
>> Hmm. This is kind of difficult. Can you reproduce it? What does your
>> dovecot-virtual file contain?
>>
> 
> I haven't seen it again since that time. I'll do some further testing with the latest
> hg version and report back if I ever see it again.
> 
> The dovecot-virtual file is very simple:
> 
> cat dovecot-virtual
> *
>    unseen

Trying to find a condition to reproduce the above issue I've seen an imap process
consuming 100% CPU. Attaching gdb to the process I got the backtrace below.
Strace isn't showing anything. Not sure if this is related to the crash above.
Unfortunately I'm also not able to reproduce this stable.


GNU gdb 6.8-debian
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This GDB was configured as "i486-linux-gnu".
Attaching to process 6376
Reading symbols from /usr/lib/dovecot/imap...done.
Reading symbols from /lib/tls/i686/cmov/libdl.so.2...Reading symbols from /usr/lib/debug/lib/tls/i686/cmov/libdl-2.9.so...done.
done.
Loaded symbols for /lib/tls/i686/cmov/libdl.so.2
Reading symbols from /lib/tls/i686/cmov/libc.so.6...Reading symbols from /usr/lib/debug/lib/tls/i686/cmov/libc-2.9.so...done.
done.
Loaded symbols for /lib/tls/i686/cmov/libc.so.6
Reading symbols from /lib/ld-linux.so.2...Reading symbols from /usr/lib/debug/lib/ld-2.9.so...done.
done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /usr/lib/dovecot/modules/imap/lib10_quota_plugin.so...done.
Loaded symbols for /usr/lib/dovecot/modules/imap/lib10_quota_plugin.so
Reading symbols from /usr/lib/dovecot/modules/imap/lib11_imap_quota_plugin.so...done.
Loaded symbols for /usr/lib/dovecot/modules/imap/lib11_imap_quota_plugin.so
Reading symbols from /usr/lib/dovecot/modules/imap/lib20_expire_plugin.so...done.
Loaded symbols for /usr/lib/dovecot/modules/imap/lib20_expire_plugin.so
Reading symbols from /usr/lib/dovecot/modules/imap/lib20_fts_plugin.so...done.
Loaded symbols for /usr/lib/dovecot/modules/imap/lib20_fts_plugin.so
Reading symbols from /usr/lib/dovecot/modules/imap/lib20_virtual_plugin.so...done.
Loaded symbols for /usr/lib/dovecot/modules/imap/lib20_virtual_plugin.so
Reading symbols from /usr/lib/dovecot/modules/imap/lib21_fts_squat_plugin.so...done.
Loaded symbols for /usr/lib/dovecot/modules/imap/lib21_fts_squat_plugin.so
0x081022a0 in seq_range_array_add (array=0xbff43a84, init_count=0, seq=57) at seq-range-array.c:54
54              if (data[count-1].seq2 == seq-1) {
(gdb) bt full
#0  0x081022a0 in seq_range_array_add (array=0xbff43a84, init_count=0, seq=57) at seq-range-array.c:54
        value = {seq1 = 57, seq2 = 57}
        idx = <value optimized out>
        __PRETTY_FUNCTION__ = "seq_range_array_add"
#1  0xb7e9771c in virtual_sync_backend_boxes (ctx=0x935cca0) at virtual-sync.c:790
        _data_stack_cur_id = 4
        i = 4
        ret = 0
#2  0xb7e98dc4 in virtual_storage_sync_init (box=0x92485d0, flags=0) at virtual-sync.c:1445
        sync_ctx = <value optimized out>
        ret = <value optimized out>
#3  0x080700d4 in imap_sync_init (client=0x8f7b188, box=0x92485d0, imap_flags=0, flags=0) at imap-sync.c:146
        ctx = (struct imap_sync_context *) 0x92ae7d0
        __PRETTY_FUNCTION__ = "imap_sync_init"
#4  0x080626c2 in idle_sync_now (box=<value optimized out>, ctx=0x8f6ea38) at cmd-idle.c:122
        __PRETTY_FUNCTION__ = "idle_sync_now"
#5  0x08062829 in cmd_idle (cmd=0x8f7b418) at cmd-idle.c:243
        client = (struct client *) 0x8f7b188
        ctx = <value optimized out>
        str = <value optimized out>
        interval = <value optimized out>
#6  0x0806766c in client_command_input (cmd=0x8f7b418) at client.c:611
        client = (struct client *) 0x8f7b188
        command = <value optimized out>
        __PRETTY_FUNCTION__ = "client_command_input"
#7  0x08067713 in client_command_input (cmd=0x8f7b418) at client.c:660
        client = (struct client *) 0x8f7b188
        command = <value optimized out>
        __PRETTY_FUNCTION__ = "client_command_input"
#8  0x0806786d in client_handle_input (client=0x8f7b188) at client.c:701
        _data_stack_cur_id = 3
        ret = false
        remove_io = <value optimized out>
        handled_commands = false
        __PRETTY_FUNCTION__ = "client_handle_input"
#9  0x080681cf in client_input (client=0x8f7b188) at client.c:752
---Type <return> to continue, or q <return> to quit---
        cmd = <value optimized out>
        output = (struct ostream *) 0x8f7b33c
        bytes = <value optimized out>
        __PRETTY_FUNCTION__ = "client_input"
#10 0x080f9b00 in io_loop_handler_run (ioloop=0x8f769b0) at ioloop-epoll.c:208
        ctx = (struct ioloop_handler_context *) 0x8f76ab8
        event = (const struct epoll_event *) 0x8f76af8
        list = (struct io_list *) 0x8f7b3c0
        io = (struct io_file *) 0x8f8cdc0
        tv = {tv_sec = 4, tv_usec = 344429}
        t_id = 2
        msecs = <value optimized out>
        ret = 1
        i = 0
        j = 0
        call = <value optimized out>
#11 0x080f8f80 in io_loop_run (ioloop=0x8f769b0) at ioloop.c:338
No locals.
#12 0x08070c55 in main (argc=Cannot access memory at address 0x38
) at main.c:323
No locals.