v2.2.17 release candidate released
Reuben Farrelly
reuben-dovecot at reub.net
Sun May 10 08:47:15 UTC 2015
On 10/05/2015 5:47 PM, Timo Sirainen wrote:
>> How do I go about debugging this further? How do I go about
>> getting a backtrace on what is essentially a child process that
>> doesn't produce a core? (Note that my installation normally does
>> produce cores when it crashes, so there's something different about
>> these indexer processes..)
>
> One thing that often works is:
>
> mkdir /var/core; chmod 0777 /var/core echo "/var/core/%p" >
> /proc/sys/kernel/core_pattern
>
> If that doesn't help, you can also try: sysctl -w fs.suid_dumpable=2
> (and disable afterwards)
>
> Also if you can get indexer-worker to start without crashing (new
> mail delivery works?) you can attach gdb into it and wait for it to
> crash (gdb -p <indexer-worker pid>, cont).
Ok we have some (well, lots actually) of coredumps now:
tornado core # gdb /usr/libexec/dovecot/indexer-worker 26697
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Reading symbols from /usr/libexec/dovecot/indexer-worker...done.
Attaching to program: /usr/libexec/dovecot/indexer-worker, process 26697
ptrace: No such process.
[New LWP 26697]
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `dovecot/indexer-worker'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00007f4834fcc222 in fts_user_get_data_lang (user=0x16c7900)
at fts-user.c:302
302 fts-user.c: No such file or directory.
(gdb) info locals
hdr = 0x1701f08
key = {uid = 8553, type = FTS_BACKEND_BUILD_KEY_HDR, part = 0x1696860,
hdr_name = 0x1702120 "To", body_content_type = 0x0,
body_content_disposition = 0x0}
(gdb) bt full
#0 0x00007f4834fcc222 in fts_user_get_data_lang (user=0x16c7900)
at fts-user.c:302
fuser = 0x0
lang = 0x0
error = 0xf <error: Cannot access memory at address 0xf>
__FUNCTION__ = "fts_user_get_data_lang"
#1 0x00007f4834fc1bdb in fts_build_mail_header (ctx=0x7ffd5e021ca0,
block=0x7ffd5e021c80) at fts-build-mail.c:164
hdr = 0x1701f08
key = {uid = 8553, type = FTS_BACKEND_BUILD_KEY_HDR, part =
0x1696860,
hdr_name = 0x1702120 "To", body_content_type = 0x0,
body_content_disposition = 0x0}
#2 0x00007f4834fc2b68 in fts_build_mail_real (update_ctx=0x16f5130,
mail=0x17010f0) at fts-build-mail.c:540
ctx = {mail = 0x17010f0, update_ctx = 0x16f5130, content_type =
0x0,
content_disposition = 0x0, body_parser = 0x0, word_buf = 0x0,
pending_input = 0x0, cur_user_lang = 0x0}
input = 0x1701990
parser = 0x1701b20
decoder = 0x1701ef0
raw_block = {part = 0x1696860, hdr = 0x1702050, data = 0x0,
size = 0}
block = {part = 0x1696860, hdr = 0x1701f08, data =
0x7ffd5e021cd8 "",
size = 0}
prev_part = 0x1696860
parts = 0x7f4835cc94c0 <static_system_pool>
skip_body = false
body_part = false
body_added = false
binary_body = 192
ret = 1
__FUNCTION__ = "fts_build_mail_real"
#3 0x00007f4834fc2dcf in fts_build_mail (update_ctx=0x16f5130,
mail=0x17010f0)
at fts-build-mail.c:583
_data_stack_cur_id = 6
ret = 0
#4 0x00007f4834fca343 in fts_mail_index (_mail=0x17010f0) at
fts-storage.c:484
ft = 0x16fd570
flist = 0x16cc690
#5 0x00007f4834fca440 in fts_mail_precache (_mail=0x17010f0)
at fts-storage.c:501
_data_stack_cur_id = 5
mail = 0x17010f0
fmail = 0x1701580
ft = 0x16fd570
#6 0x00007f4835cf633a in mail_precache (mail=0x17010f0) at mail.c:401
_data_stack_cur_id = 4
p = 0x17010f0
#7 0x00000000004024b5 in index_mailbox_precache (conn=0x16a3040,
box=0x16d0580) at master-connection.c:93
storage = 0x16cba20
username = 0x16c79e8 "reuben"
box_vname = 0x16d0888 "Sent"
status = {messages = 453, recent = 0, unseen = 0,
uidvalidity = 1267935879, uidnext = 8558, first_unseen_seq = 0,
first_recent_uid = 8557, last_cached_seq = 448,
highest_modseq = 0,
highest_pvt_modseq = 0, keywords = 0x0, permanent_flags = 0,
permanent_keywords = 0, allow_new_keywords = 0,
nonpermanent_modseqs = 0, no_modseq_tracking = 0, have_guids
= 1,
have_save_guids = 1, have_only_guid128 = 0}
trans = 0x16e4b80
search_args = 0x0
ctx = 0x16d0370
mail = 0x17010f0
metadata = {guid = '\000' <repeats 15 times>, virtual_size = 0,
cache_fields = 0x0,
precache_fields = (MAIL_FETCH_STREAM_HEADER |
MAIL_FETCH_STREAM_BODY | MAIL_FETCH_RECEIVED_DATE | MAIL_FETCH_SAVE_DATE
| MAIL_FETCH_PHYSICAL_SIZE | MAIL_FETCH_VIRTUAL_SIZE |
MAIL_FETCH_UIDL_BACKEND | MAIL_FETCH_GUID),
backend_ns_prefix = 0x0, backend_ns_type = (unknown: 0)}
seq = 449
percentage_str = "\000\000\000"
counter = 0
max = 5
percentage = 0
percentage_sent = 0
ret = 0
#8 0x000000000040295d in index_mailbox (conn=0x16a3040, user=0x16c7900,
mailbox=0x1694067 "Sent", max_recent_msgs=0, what=0x169406e "i")
at master-connection.c:186
ns = 0x16cb8d0
box = 0x16d0580
status = {messages = 23709136, recent = 0, unseen = 23709136,
uidvalidity = 0, uidnext = 4294966784,
first_unseen_seq = 4294967295, first_recent_uid = 23683432,
last_cached_seq = 0, highest_modseq = 140726180650944,
highest_pvt_modseq = 4203059, keywords = 0x16a1bc0,
permanent_flags = 0, permanent_keywords = 0,
allow_new_keywords = 0,
nonpermanent_modseqs = 0, no_modseq_tracking = 0, have_guids
= 0,
have_save_guids = 0, have_only_guid128 = 0}
path = 0x1696180 "/home/reuben/Maildir/.Sent"
errstr = 0x7f48359cafc1 <master_service_settings_get+31>
"H\211E\370H\213E\370H\213"
error = MAIL_ERROR_NONE
sync_flags = MAILBOX_SYNC_FLAG_FULL_READ
ret = 0
#9 0x0000000000402b1e in master_connection_input_line (conn=0x16a3040,
line=0x16a3f42 "reuben\tSent\t0\ti") at master-connection.c:222
args = 0x1694070
input = {module = 0x403134 "mail",
service = 0x403139 "indexer-worker", username = 0x1694060
"reuben",
session_id = 0x0, local_ip = {family = 0, u = {ip6 = {__in6_u = {
__u6_addr8 = '\000' <repeats 15 times>, __u6_addr16 =
{0, 0,
0, 0, 0, 0, 0, 0}, __u6_addr32 = {0, 0, 0, 0}}},
ip4 = {
s_addr = 0}}}, remote_ip = {family = 0, u = {ip6 =
{__in6_u = {
__u6_addr8 = '\000' <repeats 15 times>, __u6_addr16 =
{0, 0,
0, 0, 0, 0, 0, 0}, __u6_addr32 = {0, 0, 0, 0}}},
ip4 = {
s_addr = 0}}}, local_port = 0, remote_port = 0,
userdb_fields = 0x0, flags_override_add = (unknown: 0),
flags_override_remove = (unknown: 0), no_userdb_lookup = 0}
service_user = 0x16a6000
user = 0x16c7900
str = 0x16a3f3e "1\t0"
error = 0x7f4835ff3bb0 "I\211\303f\017\032\\$0f\017\032T$
f\017\032L$\020f\017\032\004$L\213L$pL\213D$hH\213|$`H\213t$XH\213T$PH\213L$HH\213D$@H\201\304\210"
max_recent_msgs = 0
ret = 0
#10 0x0000000000402c94 in master_connection_input (conn=0x16a3040)
at master-connection.c:259
_data_stack_cur_id = 3
line = 0x16a3f42 "reuben\tSent\t0\ti"
ret = 32584
#11 0x00007f4835a53548 in io_loop_call_io (io=0x16a3080) at ioloop.c:501
ioloop = 0x169c740
t_id = 2
__FUNCTION__ = "io_loop_call_io"
#12 0x00007f4835a557f6 in io_loop_handler_run_internal (ioloop=0x169c740)
at ioloop-epoll.c:220
ctx = 0x16a15f0
events = 0x16a2430
event = 0x16a2430
list = 0x16a30e0
io = 0x16a3080
tv = {tv_sec = 2147483, tv_usec = 0}
events_count = 4
msecs = -1
ret = 1
i = 0
j = 0
call = true
__FUNCTION__ = "io_loop_handler_run_internal"
#13 0x00007f4835a536e5 in io_loop_handler_run (ioloop=0x169c740)
at ioloop.c:548
No locals.
#14 0x00007f4835a5363d in io_loop_run (ioloop=0x169c740) at ioloop.c:525
__FUNCTION__ = "io_loop_run"
#15 0x00007f48359c8215 in master_service_run (service=0x169c5d0,
callback=0x401fb6 <client_connected>) at master-service.c:569
No locals.
#16 0x0000000000402182 in main (argc=1, argv=0x169c390) at
indexer-worker.c:78
service_flags = MASTER_SERVICE_FLAG_KEEP_CONFIG_OPEN
storage_service_flags =
(MAIL_STORAGE_SERVICE_FLAG_DISALLOW_ROOT |
MAIL_STORAGE_SERVICE_FLAG_USERDB_LOOKUP |
MAIL_STORAGE_SERVICE_FLAG_TEMP_PRIV_DROP |
MAIL_STORAGE_SERVICE_FLAG_NO_IDLE_TIMEOUT)
c = -1
(gdb)
Thanks,
Reuben
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