2.2.15 Panic in mbox_sync_read_next_mail()
It might not be a fault in dovecot, as the user is accessing the folder locally with alpine while also running imap-sessions. However it would have been nice with a more graceful action than panic?
The panic is preceeded by Error: Next message unexpectedly corrupted in mbox file PATH
Panic: file mbox-sync.c: line 152 (mbox_sync_read_next_mail): assertion failed: (sync_ctx->input->v_offset != mail_ctx->mail.from_offset || sync_ctx->input->eof)
At #7 in the enclosed backtrace the actual values are sync_ctx->input->v_offset = 564 mail_ctx->mail.from_offset = 564 sync_ctx->input->eof = 0
Some will recommend convertion to maildir, but with 25 years history, thousands of active users and dozens terrabytes of mboxes, we are not even considering it.
hmk
GNU gdb 6.8
Copyright (C) 2008 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 "i386-pc-solaris2.10"...
Reading symbols from /datapool/local/dovecot-2.2.15/lib/dovecot/libdovecot-storage.so.0...done.
Loaded symbols for /local/dovecot-2.2.15/lib/dovecot/libdovecot-storage.so.0
Reading symbols from /datapool/local/dovecot-2.2.15/lib/dovecot/libdovecot.so.0...done.
Loaded symbols for /local/dovecot-2.2.15/lib/dovecot/libdovecot.so.0
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Reading symbols from /lib/ld.so.1...done.
Loaded symbols for /lib/ld.so.1
Core was generated by `dovecot/imap imap-postlogin'.
Program terminated with signal 6, Aborted.
[New process 86892 ]
#0 0xfe80c8e5 in _lwp_kill () from /lib/libc.so.1
(gdb) #0 0xfe80c8e5 in _lwp_kill () from /lib/libc.so.1
No symbol table info available.
#1 0xfe807765 in thr_kill () from /lib/libc.so.1
No symbol table info available.
#2 0xfe7b376f in raise () from /lib/libc.so.1
No symbol table info available.
#3 0xfe7929e1 in abort () from /lib/libc.so.1
No symbol table info available.
#4 0xfeda1c82 in default_fatal_finish (type=LOG_TYPE_PANIC, status=0) at failures.c:152
backtrace = 0x8093260 "0xfeda2b9f -> 0xfeda1e9b -> 0xfee9f57a -> 0xfeea207c -> 0xfeea37e9 -> 0xfeea4363 -> 0xfeea45cd -> 0xfeea477d -> 0xfeecb356 -> 0x8074b45 -> 0x805eeda -> 0x805f463 -> 0x806aad1 -> 0x8069a41 -> 0x8069d26"...
#5 0xfeda2b9f in i_internal_fatal_handler (ctx=0x80474e0,
format=0xfef4c588 "file %s: line %d (%s): assertion failed: (%s)", args=0x8047504 "°Æôþ\230")
at failures.c:152
status = 0
#6 0xfeda1e9b in i_panic (format=0xfef4c588 "file %s: line %d (%s): assertion failed: (%s)")
at failures.c:152
ctx = {type = LOG_TYPE_PANIC, exit_status = 0, timestamp = 0x0, timestamp_usecs = 0}
args = 0x8047504 "°Æôþ\230"
#7 0xfee9f57a in mbox_sync_read_next_mail (sync_ctx=0x8047794, mail_ctx=0x804760c)
at ../../../../src/lib/array.h:158
__FUNCTION__ = "mbox_sync_read_next_mail"
#8 0xfeea207c in mbox_sync_loop (sync_ctx=0x8047794, mail_ctx=0x804760c, partial=false)
at ../../../../src/lib/array.h:158
rec = (const struct mail_index_record *) 0x0
uid = 0
messages_count = 66
offset = 564
ret = 1
expunged = false
skipped_mails = true
uids_broken = false
#9 0xfeea37e9 in mbox_sync_do (sync_ctx=0x8047794, flags=0) at ../../../../src/lib/array.h:158
mbox_hdr = (struct mbox_index_header *) 0x80b4a20
mail_ctx = {sync_ctx = 0x8047794, mail = {uid = 0, idx_seq = 0, keywords = {arr = {
buffer = 0x0, element_size = 0}, v = 0x0, v_modifiable = 0x0}, flags = 32 ' ', uid_broken = 0,
expunged = 0, pseudo = 0, status_broken = 0, xstatus_broken = 0, from_offset = 564, body_size = 0,
offset = 564, space = 0}, seq = 2, hdr_offset = 564, body_offset = 564,
header_first_change = 4294967295, header_last_change = 0, header = 0x809c758,
hdr_md5_sum = "Ô\035\214Ù\217\000²\004é\200\t\230ìøB~", content_length = 18446744073709551615,
hdr_pos = {4294967295, 4294967295, 4294967295, 4294967295, 4294967295}, parsed_uid = 0,
last_uid_updated_value = 0, last_uid_value_start_pos = 0, have_eoh = 0, need_rewrite = 0,
seen_imapbase = 0, updated = 0, recent = 0, dirty = 0, imapbase_rewrite = 0, imapbase_updated = 0}
st = (const struct stat *) 0x80c0060
i = 0
ret = 52
partial = 1
#10 0xfeea4363 in mbox_sync_int (mbox=0x80b4868, flags=0, lock_id=0x8047988)
at ../../../../src/lib/array.h:158
index_sync_ctx = (struct mail_index_sync_ctx *) 0x80b62e0
sync_view = (struct mail_index_view *) 0x80b6320
trans = (struct mail_index_transaction *) 0x80c5890
sync_ctx = {mbox = 0x80b4868, flags = 0, input = 0x80c0180, file_input = 0x80c0040,
write_fd = 12, orig_mtime = 1414582020, orig_atime = 1414582021, orig_size = 3843471, last_stat = {
st_dev = 47513605, st_pad1 = {0, 0, 0}, st_ino = 17869, st_mode = 33152, st_nlink = 1,
st_uid = 22671, st_gid = 4601, st_rdev = 4294967295, st_pad2 = {0, 0}, st_size = 3843471,
st_atim = {tv_sec = 1414582021, tv_nsec = 353242309}, st_mtim = {tv_sec = 1414582020,
tv_nsec = 0}, st_ctim = {tv_sec = 1414582021, tv_nsec = 352990278}, st_blksize = 131072,
st_blocks = 7693, st_fstype = "zfs", '\0'
Interesting. We are expiring the same problem here. But our user is currently traveling in the world and uses our roundcube to access its emails:
The panic is preceeded by Error: Next message unexpectedly corrupted in mbox file PATH
Panic: file mbox-sync.c: line 152 (mbox_sync_read_next_mail): assertion failed: (sync_ctx->input->v_offset != mail_ctx->mail.from_offset || sync_ctx->input->eof)
At #7 in the enclosed backtrace the actual values are sync_ctx->input->v_offset = 564 mail_ctx->mail.from_offset = 564 sync_ctx->input->eof = 0
I can not attach a gdb output because until yet i could not catch a core dump.
Here the last lines from the logfile:
Oct 29 07:46:34 SERVER dovecot: [ID 583609 mail.debug] imap(USERNAME): Debug: Namespace : type=private, prefix=Mail/, sep=/, inbox=no, hidden=yes, list=no, subscriptions=yes location=mbox:~/Mail/:INBOX=/var/mail/USERNAME:INDEX=/usr/SERVER/vault2/dovecot/indexes/USERNAME
Oct 29 07:46:34 SERVER dovecot: [ID 583609 mail.debug] imap(USERNAME): Debug: fs: root=/home/USERNAME/Mail, index=/usr/SERVER/vault2/dovecot/indexes/USERNAME, indexpvt=, control=, inbox=/var/mail/USERNAME, alt=
Oct 29 07:46:34 SERVER dovecot: [ID 583609 mail.info] imap(USERNAME): Disconnected: Logged out in=374 out=60850
Oct 29 07:46:35 SERVER dovecot: [ID 583609 mail.error] imap(USERNAME): Error: Next message unexpectedly corrupted in mbox file /home/USERNAME/Mail/MBOXFILE at 38055772
Oct 29 07:46:35 SERVER dovecot: [ID 583609 mail.crit] imap(USERNAME): Panic: file mbox-sync.c: line 152 (mbox_sync_read_next_mail): assertion failed: (sync_ctx->input->v_offset != mail_ctx->mail.from_offset || sync_ctx->input->eof)
Oct 29 07:46:35 SERVER dovecot: [ID 583609 mail.error] imap(USERNAME): Error: Raw backtrace: 0xffffffff7ed89f64 -> 0xffffffff7ed88f10 -> 0xffffffff7ef77a14 -> 0xffffffff7ef78a1c -> 0xffffffff7ef78e98 -> 0xffffffff7ef962d0 -> 0xffffffff7ef96418 -> 0xffffffff7efc2380 -> 0xffffffff7ef9777c -> 0x100021554 -> 0x100013e8c -> 0x100019044 -> 0x100017b18 -> 0x100017ad8 -> 0x100017f3c -> 0x100018188 -> 0xffffffff7ed9c8a4 -> 0xffffffff7ed9d5a0 -> 0xffffffff7ed9c93c -> 0xffffffff7ed9ca0c -> 0xffffffff7ed3c314 -> 0x100024908 -> 0x10000a74c
Oct 29 07:46:35 SERVER dovecot: [ID 583609 mail.crit] imap(USERNAME): Fatal: master: service(imap): child 19457 killed with signal 6 (core not dumped - set service imap { drop_priv_before_exec=yes })
I have set the drop_priv_before_exec to yes, i'm just waiting for the user to connect again ;-)
Our System is a Solaris 10 and we are also using mbox for more or less the same reason as hmk.
As soon as i can catch a coredump i will send a gdb output.
Since all other users do not have such a problem i'm wondering what the reason for this could be? corrupt mbox file?
Best Regards Matthias
-- Matthias Egger ETH Zurich Department of Information Technology maegger@ee.ethz.ch and Electrical Engineering IT Support Group (ISG.EE), ETL/F/24.1 Phone +41 (0)44 632 03 90 Physikstrasse 3, CH-8092 Zurich Fax +41 (0)44 632 11 95
On 10/29/2014 02:50 PM, Matthias Egger wrote:
As soon as i can catch a coredump i will send a gdb output.
Okay, here is the gdb ouput i could catch and some more information about the system.
System Infos: SunOS HOSTNAME 5.10 Generic_150400-10 sun4u sparc SUNW,Sun-Fire-V440
Logfile Entries: Oct 30 14:27:56 HOSTNAME dovecot: [ID 583609 mail.info] imap-login: Login: user=<USERNAME>, method=PLAIN, rip=1.1.1.1, lip=2.2.2.2, mpid=15565, TLS, session=<B6os2aMGoACBhDSe>
Oct 30 14:27:56 HOSTNAME dovecot: [ID 583609 mail.debug] imap(USERNAME): Debug: Effective uid=3224, gid=320, home=/home/USERNAME
Oct 30 14:27:56 HOSTNAME dovecot: [ID 583609 mail.debug] imap(USERNAME): Debug: Namespace : type=private, prefix=, sep=/, inbox=yes, hidden=no, list=yes, subscriptions=yes location=mbox:~/Mail/:INBOX=/var/mail/USERNAME:INDEX=/usr/HOSTNAME/vault2/dovecot/indexes/USERNAME
Oct 30 14:27:56 HOSTNAME dovecot: [ID 583609 mail.debug] imap(USERNAME): Debug: fs: root=/home/USERNAME/Mail, index=/usr/HOSTNAME/vault2/dovecot/indexes/USERNAME, indexpvt=, control=, inbox=/var/mail/USERNAME, alt=
Oct 30 14:27:56 HOSTNAME dovecot: [ID 583609 mail.debug] imap(USERNAME): Debug: Namespace : type=private, prefix=Mail/, sep=/, inbox=no, hidden=yes, list=no, subscriptions=yes location=mbox:~/Mail/:INBOX=/var/mail/USERNAME:INDEX=/usr/HOSTNAME/vault2/dovecot/indexes/USERNAME
Oct 30 14:27:56 HOSTNAME dovecot: [ID 583609 mail.debug] imap(USERNAME): Debug: fs: root=/home/USERNAME/Mail, index=/usr/HOSTNAME/vault2/dovecot/indexes/USERNAME, indexpvt=, control=, inbox=/var/mail/USERNAME, alt=
Oct 30 14:27:56 HOSTNAME dovecot: [ID 583609 mail.error] imap(USERNAME): Error: Next message unexpectedly corrupted in mbox file /home/USERNAME/Mail/review at 79036384
Oct 30 14:27:56 HOSTNAME dovecot: [ID 583609 mail.crit] imap(USERNAME): Panic: file mbox-sync.c: line 152 (mbox_sync_read_next_mail): assertion failed: (sync_ctx->input->v_offset != mail_ctx->mail.from_offset || sync_ctx->input->eof)
Oct 30 14:27:56 HOSTNAME dovecot: [ID 583609 mail.error] imap(USERNAME): Error: Raw backtrace: 0xffffffff7ed89f64 -> 0xffffffff7ed88f10 -> 0xffffffff7ef77a14 -> 0xffffffff7ef78a1c -> 0xffffffff7ef70720 -> 0xffffffff7c10289c -> 0xffffffff7ef96e60 -> 0xffffffff7ef8dd6c -> 0xffffffff7c102758 -> 0xffffffff7ef97130 -> 0xffffffff7ef97250 -> 0x10000c8c8 -> 0x10000ce24 -> 0x100019044 -> 0x100017b18 -> 0x100017ad8 -> 0x100017f3c -> 0x100018188 -> 0xffffffff7ed9c8a4 -> 0xffffffff7ed9d5a0 -> 0xffffffff7ed9c93c -> 0xffffffff7ed9ca0c -> 0xffffffff7ed3c314 -> 0x100024908 -> 0x10000a74c
Oct 30 14:27:57 HOSTNAME dovecot: [ID 583609 mail.crit] imap(USERNAME): Fatal: master: service(imap): child 15565 killed with signal 6 (core dumped)
GDB Output:
GNU gdb (GDB) 7.8.1
Copyright (C) 2014 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 "sparc-sun-solaris2.10".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
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Type "apropos word" to search for commands related to "word"...
Reading symbols from
/usr/pack/dovecot-2.2.15-me/sun4u-sun-solaris2.10/libexec/dovecot/imap...done.
[New LWP 1]
[Thread debugging using libthread_db enabled]
[New Thread 1 (LWP 1)]
Core was generated by `dovecot/imap'.
Program terminated with signal SIGABRT, Aborted.
#0 0xffffffff7cddcb68 in _lwp_kill () from /lib/64/libc.so.1
(gdb) bt full
#0 0xffffffff7cddcb68 in _lwp_kill () from /lib/64/libc.so.1
No symbol table info available.
#1 0xffffffff7cd74444 in raise () from /lib/64/libc.so.1
No symbol table info available.
#2 0xffffffff7cd4c1c8 in abort () from /lib/64/libc.so.1
No symbol table info available.
#3 0xffffffff7ed88d7c in default_fatal_finish (type=LOG_TYPE_PANIC,
status=0) at failures.c:202
backtrace = 0x100133db0 "0xffffffff7ed89f64 ->
0xffffffff7ed88f10 -> 0xffffffff7ef77a14 -> 0xffffffff7ef78a1c ->
0xffffffff7ef70720 -> 0xffffffff7c10289c -> 0xffffffff7ef96e60 ->
0xffffffff7ef8dd6c -> 0xffffffff7c102758 -> 0x"...
#4 0xffffffff7ed89f6c in i_internal_fatal_handler
(ctx=0xffffffff7fffe2e0, format=0xffffffff7effba48 "file %s: line %d
(%s): assertion failed: (%s)", args=0x0) at failures.c:666
status = 0
#5 0xffffffff7ed88f18 in i_panic (format=0xffffffff7effba48 "file %s:
line %d (%s): assertion failed: (%s)") at failures.c:276
ctx = {type = LOG_TYPE_PANIC, exit_status = 0, timestamp = 0x0,
timestamp_usecs = 0}
#6 0xffffffff7ef77a1c in mbox_sync_do (sync_ctx=0xffffffff7fffe760,
flags=(MBOX_SYNC_FORCE_SYNC | MBOX_SYNC_READONLY | unknown: 2147477248))
at mbox-sync.c:1506
seq = 1611168
view = 0xffffffff7eeddcf8
st = 0x0
first_recent_uid = 0
seq2 = 1
mbox_hdr = 0x1
mail_ctx = {sync_ctx = 0xffffffff7fffe760, mail = {uid = 0,
idx_seq = 0, keywords = {arr = {buffer = 0x0, element_size = 0}, v =
0x0, v_modifiable = 0x0}, flags = 32 ' ', uid_broken = 0, expunged = 0,
pseudo = 0, status_broken = 0, xstatus_broken = 0,
from_offset = 558, body_size = 0, offset = 558, space = 0}, seq = 2,
hdr_offset = 558, body_offset = 558,
header_first_change = 18446744073709551615, header_last_change
= 0, header = 0x100140230, hdr_md5_sum =
"\324\035\214\331\217\000\262\004\351\200\t\230\354\370B~",
content_length = 18446744073709551615, hdr_pos =
{18446744073709551615, 18446744073709551615, 18446744073709551615,
18446744073709551615, 18446744073709551615}, parsed_uid = 0,
last_uid_updated_value = 0, last_uid_value_start_pos = 0,
have_eoh = 0, need_rewrite = 0, seen_imapbase = 0, updated = 0, recent =
0, dirty = 0, imapbase_rewrite = 0, imapbase_updated = 0}
st = 0x1001895c8
i = 0
ret = 1389811195
partial = 1389811195
#7 0xffffffff7ef78a24 in mbox_sync (mbox=0x100163a50, flags=(unknown:
0)) at mbox-sync.c:1947
sync_ctx = {mbox = 0x100163a50, flags = (unknown: 0), input =
0x100189750, file_input = 0x1001895a0, write_fd = 16, orig_mtime =
1414623452, orig_atime = 1414675298, orig_size = 80880344, last_stat = {
st_dev = 1657857376531, st_ino = 128607, st_mode = 33152,
st_nlink = 1, st_uid = 3224, st_gid = 320, st_rdev = 0, st_size =
80880344, st_atim = {tv_sec = 1414675298, tv_nsec = 859380000}, st_mtim = {
tv_sec = 1414623452, tv_nsec = 0}, st_ctim = {tv_sec =
1414623453, tv_nsec = 933899000}, st_blksize = 8192, st_blocks = 158080,
st_fstype = "nfs", '\000'
Best regards Matthias
Matthias Egger ETH Zurich Department of Information Technology maegger@ee.ethz.ch and Electrical Engineering IT Support Group (ISG.EE), ETL/F/24.1 Phone +41 (0)44 632 03 90 Physikstrasse 3, CH-8092 Zurich Fax +41 (0)44 632 11 95
On 30/10/14 15:44, Matthias Egger wrote:
On 10/29/2014 02:50 PM, Matthias Egger wrote:
As soon as i can catch a coredump i will send a gdb output. Okay, here is the gdb ouput i could catch and some more information about the system.
System Infos: SunOS HOSTNAME 5.10 Generic_150400-10 sun4u sparc SUNW,Sun-Fire-V440
We are experiencing the same issues on CentOS 5: Linux 2.6.18-371.12.1.el5 x86_64
At first, we were reindexing all users with this issue (doveadm index), now we are just forcing mailbox resync (doveadm force-mailbox-resync), however it is not fixing it :(
We still don't have the pattern, when does this occur (multiple IMAP sessions?, IMAP/POP)...
We might revert to 2.2.13, where such problems were way less frequent.
cheers, Jernej
Has someone of you just found any kind of solution to this problem?
We first had only one user with this problem. But now there are two more users expecting the same problems. And as Jernej said, doveadm "index" and "force-resync" do not solve the problem at all. After a few hours these users have the same kind of errors and crashes.
We have now reverted back to 2.2.13 but that could not be a permanent solution.
Timo Sirainen, have you maybe given a look to this or any hint?
Best regards Matthias
Matthias Egger ETH Zurich Department of Information Technology maegger@ee.ethz.ch and Electrical Engineering IT Support Group (ISG.EE), ETL/F/24.1 Phone +41 (0)44 632 03 90 Physikstrasse 3, CH-8092 Zurich Fax +41 (0)44 632 11 95
On 11/04/2014 01:38 PM, Matthias Egger wrote:
Has someone of you just found any kind of solution to this problem?
Could the people experiencing this please send at least a) output of doveconf -n b) anonymized mbox content for an affected mbox ( http://www.dovecot.org/tools/mbox-anonymize.pl ). Other details can not hurt either.
br, Teemu Huovila
On Tue, Nov 04, 2014 at 12:38:02PM +0100, Matthias Egger wrote:
Has someone of you just found any kind of solution to this problem?
We have been running some days with patches 31262a892ba7 and 80ed82a93c1a from http://hg.dovecot.org/dovecot-2.2/
They are working fine, handling the previously paniced situations smoothly. Thanks again to the folks at dovecot.org!
hmk
Hello Hans
On 11/23/2014 05:57 PM, Hans Morten Kind wrote:
On Tue, Nov 04, 2014 at 12:38:02PM +0100, Matthias Egger wrote:
Has someone of you just found any kind of solution to this problem?
We have been running some days with patches 31262a892ba7 and 80ed82a93c1a from http://hg.dovecot.org/dovecot-2.2/
They are working fine, handling the previously paniced situations smoothly. Thanks again to the folks at dovecot.org!
Thank you for sharing this. I will give today or tomorrow a look at these patches.
Matthias
-- Matthias Egger ETH Zurich Department of Information Technology maegger@ee.ethz.ch and Electrical Engineering IT Support Group (ISG.EE), ETL/F/24.1 Phone +41 (0)44 632 03 90 Physikstrasse 3, CH-8092 Zurich Fax +41 (0)44 632 11 95
On 26/11/14 10:09, Matthias Egger wrote:
Hello Hans
On 11/23/2014 05:57 PM, Hans Morten Kind wrote:
On Tue, Nov 04, 2014 at 12:38:02PM +0100, Matthias Egger wrote:
Has someone of you just found any kind of solution to this problem?
We have been running some days with patches 31262a892ba7 and 80ed82a93c1a from http://hg.dovecot.org/dovecot-2.2/
They are working fine, handling the previously paniced situations smoothly. Thanks again to the folks at dovecot.org!
Thank you for sharing this. I will give today or tomorrow a look at these patches.
At least at our side, these patches have fixed a large number of segfaults opening mbox files.
Thank you Timo and dovecot team!!!
cheers, Jernej
participants (5)
-
Hans Morten Kind
-
Hans Morten Kind
-
Jernej Porenta
-
Matthias Egger
-
Teemu Huovila