Dovecot auth process repeatedly crashes on OS X Server 10.9
James Reynolds
reynolds at biology.utah.edu
Fri Nov 7 00:26:54 UTC 2014
My dovecot/auth process crashes several times a minute, sometimes at the same second, sometimes randomly. I’ve turned on auth_debug and been pouring over everything trying to see if I can see what is going on but I can’t find anything. I’m running OS X Server 10.9 and dovecot 2.2.5. I can’t say for sure, but it looks to me like the crashed process doesn’t even save anything to mail-debug.log before it crashes. It takes about 2 seconds for it to come up. Once it crashed about 10 times in 2 seconds.
Can anyone give me any ideas where I should look?
Here are relevant portions from logs:
mail-info.log
Nov 06 17:19:10 pop3-login: Info: Aborted login (auth process communication failure): user=<>, method=DIGEST-MD5, rip=155.101.106.229, lip=10.0.0.128, TLS
mail-err.log
Nov 06 17:19:10 pop3-login: Warning: Auth connection closed with 1 pending requests (max 0 secs, pid=66114, EOF)
Nov 06 17:19:10 auth: Fatal: master: service(auth): child 66100 killed with signal 11 (core dumps disabled)
It looks exactly like what is discussed here:
https://discussions.apple.com/thread/6482632?start=0&tstart=0
I do have clients using Outlook. I haven’t run wireshark or tried to verify it is Outlook by testing different clients.
postconf -n
# 2.2.5: /Library/Server/Mail/Config/dovecot/dovecot.conf
# OS: Darwin 13.3.0 x86_64 hfs
auth_mechanisms = cram-md5 digest-md5 plain login
auth_realms = biomail.biology.utah.edu
auth_socket_path = /var/run/dovecot/auth-userdb
auth_username_format = %n
debug_log_path = /Library/Logs/Mail/mail-debug.log
default_internal_user = _dovecot
default_login_user = _dovenull
first_valid_gid = 6
first_valid_uid = 6
imap_id_log = *
imap_id_send = "name" * "version" *
imap_urlauth_submit_user = submit
info_log_path = /Library/Logs/Mail/mail-info.log
log_path = /Library/Logs/Mail/mail-err.log
login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c
mail_access_groups = mail
mail_attribute_dict = file:/Library/Server/Mail/Data/attributes/attributes.dict
mail_location = maildir:/Library/Server/Mail/Data/mail/%u
mail_log_prefix = "%s(pid %p user %u): "
mail_plugins = quota zlib acl fts fts_sk
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave
mdbox_rotate_size = 200 M
namespace acl-mailboxes {
list = children
location = maildir:/Library/Server/Mail/Data/mail/users/%%u:INDEX=/Library/Server/Mail/Data/mail/shared/%%u
prefix = shared.%%u.
separator = .
subscriptions = no
type = shared
}
namespace inbox {
inbox = yes
location =
mailbox Drafts {
special_use = \Drafts
}
mailbox Junk {
special_use = \Junk
}
mailbox Sent {
special_use = \Sent
}
mailbox "Sent Messages" {
special_use = \Sent
}
mailbox Trash {
special_use = \Trash
}
prefix =
}
namespace list-archives {
list = children
location = maildir:/Library/Server/Mail/Data/listserver/messages/archive/lists/%%u:INDEX=/Library/Server/Mail/Data/listserver/messages/archive/shared/%%u
prefix = archives.%%u.
separator = .
subscriptions = no
type = shared
}
passdb {
driver = od
}
passdb {
args = /Library/Server/Mail/Config/dovecot/submit.passdb
driver = passwd-file
}
plugin {
acl = vfile:/Library/Server/Mail/Config/dovecot/global-acls:cache_secs=300
acl_shared_dict = file:/Library/Server/Mail/Data/shared/shared-mailboxes
fts = sk
quota = maildir:User quota
quota_warning = storage=100%% quota-exceeded %u
sieve = /Library/Server/Mail/Data/rules/%u/dovecot.sieve
sieve_dir = /Library/Server/Mail/Data/rules/%u
stats_refresh = 30 secs
stats_track_cmds = yes
}
postmaster_address = postmaster at biology.utah.edu
protocols = imap pop3 lmtp sieve
quota_full_tempfail = yes
service auth {
idle_kill = 15 mins
unix_listener auth-userdb {
user = _dovecot
}
}
service dns_client {
unix_listener dns-client {
mode = 0600
}
}
service imap-login {
inet_listener imap {
port = 143
}
inet_listener imaps {
port = 993
ssl = yes
}
service_count = 0
}
service imap {
client_limit = 5
process_limit = 200
service_count = 0
}
service indexer-worker {
user = _dovecot
}
service lmtp {
unix_listener lmtp {
mode = 0600
}
}
service managesieve-login {
inet_listener sieve {
port = 4190
}
}
service pop3-login {
inet_listener pop3 {
port = 110
}
inet_listener pop3s {
port = 995
ssl = yes
}
}
service pop3 {
client_limit = 5
process_limit = 200
service_count = 0
}
service quota-exceeded {
executable = script /Applications/Server.app/Contents/ServerRoot/usr/libexec/dovecot/quota-exceeded.sh
unix_listener quota-exceeded {
group = mail
mode = 0660
user = _dovecot
}
user = _dovecot
}
service quota-warning {
executable = script /Applications/Server.app/Contents/ServerRoot/usr/libexec/dovecot/quota-warning.sh
unix_listener quota-warning {
group = mail
mode = 0660
user = _dovecot
}
user = _dovecot
}
service stats {
fifo_listener stats-mail {
mode = 0600
user = _dovecot
}
}
ssl_ca = </etc/certificates/biomail.biology.utah.edu.CE3811751089890AEEC60B91DF2C083EE1BAD5EB.chain.pem
ssl_cert = </etc/certificates/biomail.biology.utah.edu.CE3811751089890AEEC60B91DF2C083EE1BAD5EB.cert.pem
ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL:!ADH:!eNULL
ssl_key = </etc/certificates/biomail.biology.utah.edu.CE3811751089890AEEC60B91DF2C083EE1BAD5EB.key.pem
ssl_key_path = /etc/certificates/biomail.biology.utah.edu.CE3811751089890AEEC60B91DF2C083EE1BAD5EB.key.pem
userdb {
args = partition=/Library/Server/Mail/Config/dovecot/partition_map.conf enforce_quotas=no
driver = od
}
userdb {
args = /Library/Server/Mail/Config/dovecot/submit.passdb
driver = passwd-file
}
verbose_proctitle = yes
protocol lmtp {
mail_plugins = quota zlib acl fts fts_sk sieve
}
protocol lda {
mail_plugins = quota zlib acl fts fts_sk sieve
}
protocol imap {
mail_max_userip_connections = 20
mail_plugins = quota zlib acl fts fts_sk imap_acl imap_quota imap_zlib
}
protocol pop3 {
mail_max_userip_connections = 6
}
Here’s part of a crash report:
Process: auth [60325]
Path: /Applications/Server.app/Contents/ServerRoot/usr/libexec/dovecot/auth
Identifier: auth
Version: 294
Code Type: X86-64 (Native)
Parent Process: dovecotd [149]
Responsible: dovecotd [149]
User ID: 214
Date/Time: 2014-11-06 16:34:20.777 -0700
OS Version: Mac OS X 10.9.4 (13E28)
Report Version: 11
Anonymous UUID: 9EB07E95-1536-96FA-A8C7-3784045DCDDE
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000000
VM Regions Near 0:
-->
__TEXT 0000000103b39000-0000000103b6a000 [ 196K] r-x/rwx SM=COW /Applications/Server.app/Contents/ServerRoot/usr/libexec/dovecot/auth
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libsystem_c.dylib 0x00007fff8a181732 strlen + 18
1 libdovecot.0.dylib 0x0000000103bdc2b8 vstrconcat + 72
Thread 1:
0 libsystem_kernel.dylib 0x00007fff858f9e6a __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x00007fff89901f08 _pthread_wqthread + 330
2 libsystem_pthread.dylib 0x00007fff89904fb9 start_wqthread + 13
Thread 2:: Dispatch queue: com.apple.libdispatch-manager
0 libsystem_kernel.dylib 0x00007fff858fa662 kevent64 + 10
1 libdispatch.dylib 0x00007fff8808f421 _dispatch_mgr_invoke + 239
2 libdispatch.dylib 0x00007fff8808f136 _dispatch_mgr_thread + 52
Thread 3:
0 libsystem_kernel.dylib 0x00007fff858f9e6a __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x00007fff89901f08 _pthread_wqthread + 330
2 libsystem_pthread.dylib 0x00007fff89904fb9 start_wqthread + 13
Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x00007fff5c0c6878 rbx: 0x0000000000000001 rcx: 0x0000000000000001 rdx: 0x0000000000000001
rdi: 0x0000000000000000 rsi: 0x0000000103b6354d rbp: 0x00007fff5c0c6800 rsp: 0x00007fff5c0c6800
r8: 0x0000000103b6354e r9: 0x0000000000000000 r10: 0x00007fff8a1c92a8 r11: 0x00007fb60dca54c3
r12: 0x0000000000000028 r13: 0x00007fff5c0c6920 r14: 0x0000000000000028 r15: 0x0000000000000009
rip: 0x00007fff8a181732 rfl: 0x0000000000010246 cr2: 0x0000000000000000
Logical CPU: 0
Error Code: 0x00000004
Trap Number: 14
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