dovecot: config: Error: BUG: Config client connection sent too much data
Tony
tony at kode.email
Sat Aug 26 13:58:57 EEST 2017
Did some additional testing with these results.
* Configured a new Dovecot host (copied over existing config from 1 of
the replicated hosts.
* Verified permissions on new host
drwxr-xr-x 3 root root 4096 Aug 26 00:05 /etc/dovecot/
drwxr-xr-x 5 root dovecot 800 Aug 26 02:50 /var/run/dovecot/
Made sure address matches new host:
service lmtp {
user = vmail
inet_listener lmtp {
address = 173.xxx.xxx.xxx 192.xxx.xxx.xxx 127.0.0.1 ::1
port = 24
}
Verified replication is unrelated from new host:
replication plugin = disabled (no errors)
replication plugin = enabled (same error on existing replicated host,
but not new host)
new host serving Dovecot by itself with no replication: no errors
new host serving Dovecot with replication (target: existing replication
host): no errors (but existing host still gives errors)
existing host serving Dovecot with replication: errors
existing host serving Dovecot by itself with no replication: errors
New Working Dovecot Instance:
# ll /var/run/dovecot/
total 4
srw------- 1 root root 0 Aug 26 01:50 anvil
srw------- 1 root root 0 Aug 26 01:50 anvil-auth-penalty
srw------- 1 dovecot root 0 Aug 26 01:50 auth-client
srw------- 1 dovecot root 0 Aug 26 01:50 auth-login
srw------- 1 root root 0 Aug 26 01:50 auth-master
-rw------- 1 root root 32 Aug 26 01:50 auth-token-secret.dat
srw-rw---- 1 vmail vmail 0 Aug 26 01:50 auth-userdb
srw------- 1 dovecot root 0 Aug 26 01:50 auth-worker
srw------- 1 vmail root 0 Aug 26 01:50 config
srw-rw---- 1 vmail vmail 0 Aug 26 01:50 dict
srw------- 1 root root 0 Aug 26 01:50 dict-async
srw------- 1 root root 0 Aug 26 01:50 director-admin
srw------- 1 root root 0 Aug 26 01:50 director-userdb
srw-rw-rw- 1 root root 0 Aug 26 01:50 dns-client
srw------- 1 root root 0 Aug 26 01:50 doveadm-server
lrwxrwxrwx 1 root root 25 Aug 26 01:50 dovecot.conf ->
/etc/dovecot/dovecot.conf
drwxr-xr-x 2 root root 40 Aug 26 01:49 empty
srw------- 1 root root 0 Aug 26 01:50 imap-hibernate
srw------- 1 root root 0 Aug 26 01:50 imap-master
srw-rw-rw- 1 root root 0 Aug 26 01:50 imap-urlauth
srw------- 1 dovecot root 0 Aug 26 01:50 imap-urlauth-worker
srw-rw-rw- 1 root root 0 Aug 26 01:50 indexer
srw------- 1 dovecot root 0 Aug 26 01:50 indexer-worker
srw------- 1 root root 0 Aug 26 01:50 ipc
srw-rw-rw- 1 root root 0 Aug 26 01:50 lmtp
srw------- 1 root root 0 Aug 26 01:50 log-errors
drwxr-x--- 2 root dovenull 160 Aug 26 01:50 login
srw------- 1 root root 0 Aug 26 01:50 master
srw------- 1 vmail root 0 Aug 26 01:50 quota-warning
srw-rw-rw- 1 vmail root 0 Aug 26 01:50 replication-notify
prw-rw-rw- 1 vmail root 0 Aug 26 01:50 replication-notify-fifo
srw------- 1 dovecot root 0 Aug 26 01:50 replicator
srw-rw-rw- 1 dovecot root 0 Aug 26 01:50 replicator-doveadm
srw-rw-rw- 1 root root 0 Aug 26 01:50 ssl-params
srw------- 1 root root 0 Aug 26 01:50 stats
prw------- 1 vmail root 0 Aug 26 02:47 stats-mail
prw------- 1 root root 0 Aug 26 01:50 stats-user
drwxr-x--- 2 root dovenull 80 Aug 26 01:50 token-login
Existing replicated instance with errors:
# ll /var/run/dovecot/
total 8
srw------- 1 root root 0 Aug 26 03:31 anvil
srw------- 1 root root 0 Aug 26 03:31 anvil-auth-penalty
srw------- 1 dovecot root 0 Aug 26 03:31 auth-client
srw------- 1 dovecot root 0 Aug 26 03:31 auth-login
srw------- 1 root root 0 Aug 26 03:31 auth-master
-rw------- 1 root root 32 Aug 26 02:11 auth-token-secret.dat
srw-rw---- 1 vmail vmail 0 Aug 26 03:31 auth-userdb
srw------- 1 dovecot root 0 Aug 26 03:31 auth-worker
srw------- 1 vmail root 0 Aug 26 03:31 config
srw-rw---- 1 vmail vmail 0 Aug 26 03:31 dict
srw------- 1 root root 0 Aug 26 03:31 dict-async
srw------- 1 root root 0 Aug 26 03:31 director-admin
srw------- 1 root root 0 Aug 26 03:31 director-userdb
srw-rw-rw- 1 root root 0 Aug 26 03:31 dns-client
srw------- 1 root root 0 Aug 26 03:31 doveadm-server
lrwxrwxrwx 1 root root 25 Aug 26 03:31 dovecot.conf ->
/etc/dovecot/dovecot.conf
drwxr-xr-x 2 root root 40 Aug 26 02:11 empty
srw------- 1 root root 0 Aug 26 03:31 imap-hibernate
srw------- 1 root root 0 Aug 26 03:31 imap-master
srw-rw-rw- 1 root root 0 Aug 26 03:31 imap-urlauth
srw------- 1 dovecot root 0 Aug 26 03:31 imap-urlauth-worker
srw-rw-rw- 1 root root 0 Aug 26 03:31 indexer
srw------- 1 dovecot root 0 Aug 26 03:31 indexer-worker
srw------- 1 root root 0 Aug 26 03:31 ipc
srw-rw-rw- 1 root root 0 Aug 26 03:31 lmtp
srw------- 1 root root 0 Aug 26 03:31 log-errors
drwxr-x--- 2 root dovenull 160 Aug 26 03:31 login
srw------- 1 root root 0 Aug 26 03:31 master
-rw------- 1 root root 5 Aug 26 03:31 master.pid
srw------- 1 vmail root 0 Aug 26 03:31 quota-warning
srw-rw-rw- 1 vmail root 0 Aug 26 03:31 replication-notify
prw-rw-rw- 1 vmail root 0 Aug 26 03:44 replication-notify-fifo
srw------- 1 dovecot root 0 Aug 26 03:31 replicator
srw-rw-rw- 1 dovecot root 0 Aug 26 03:31 replicator-doveadm
srw-rw-rw- 1 root root 0 Aug 26 03:31 ssl-params
srw------- 1 root root 0 Aug 26 03:31 stats
prw------- 1 vmail root 0 Aug 26 03:44 stats-mail
prw------- 1 root root 0 Aug 26 03:31 stats-user
drwxr-x--- 2 root dovenull 80 Aug 26 03:31 token-login
The 2 existing replicated hosts continue to spit out the error ~5 min.
The new host running the same Dovecot version on the same OS/distro did
not get errors with and without replication. I have compared configs and
permissions on both hosts which are identical and can't seem to find any
distinct differences that would help explain the error. I have also
tried clearing out Dovecot's index files on the 2 problematic hosts to
no avail using:
systemctl stop dovecot
find "$home" -type f -name dovecot.index -delete
find "$home" -type f -name dovecot.index.cache -delete
find "$home" -type f -name dovecot.index.log -delete
find "$home" -type f -name dovecot.index.log.2 -delete
systemctl start dovecot
Clearing the index files made no different as the error continues ~5 min.
I can't wrap my head around this one and am not sure what else to try.
-
Tony
On 8/25/17 9:40 AM, Tony wrote:
> Hello,
>
> Absolutely. Here is the output of doveconf -n:
>
> # doveconf -n
> # 2.2.31 (65cde28): /etc/dovecot/dovecot.conf
> # Pigeonhole version 0.4.19 (e5c7051)
> # OS: Linux 4.9.36-x86_64-linodexx x86_64 Arch Linux
> auth_mechanisms = plain login
> base_dir = /var/run/dovecot/
> dict {
> expire = ldap:/etc/dovecot/dovecot-ldap.conf.ext
> quota = ldap:/etc/dovecot/dovecot-ldap.conf.ext
> }
> doveadm_password = # hidden, use -P to show it
> doveadm_port = 4343
> mail_attachment_hash = %{sha256}
> mail_gid = vmail
> mail_location = maildir:%Lh/Maildir/:INDEX=%Lh/Maildir/
> mail_plugins = " mailbox_alias acl quota stats mail_log notify replication"
> mail_privileged_group = mail
> mail_uid = vmail
> mailbox_list_index = yes
> maildir_very_dirty_syncs = yes
> 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 index ihave duplicate mime foreverypart
> extracttext spamtest spamtestplus
> namespace inbox {
> inbox = yes
> location =
> mailbox Archive {
> special_use = \Archive
> }
> mailbox Drafts {
> auto = subscribe
> special_use = \Drafts
> }
> mailbox Flagged {
> special_use = \Flagged
> }
> mailbox Junk {
> special_use = \Junk
> }
> mailbox Sent {
> auto = subscribe
> special_use = \Sent
> }
> mailbox "Sent Messages" {
> auto = subscribe
> special_use = \Sent
> }
> mailbox Spam {
> auto = subscribe
> special_use = \Junk
> }
> mailbox Trash {
> auto = subscribe
> special_use = \Trash
> }
> mailbox virtual/All {
> auto = no
> special_use = \All
> }
> prefix =
> }
> passdb {
> args = /etc/dovecot/dovecot-ldap.conf.ext
> driver = ldap
> }
> plugin {
> mail_log_events = delete undelete expunge copy mailbox_delete
> mailbox_rename
> mail_log_fields = uid box msgid size
> mail_replica = tcp:orbitron.domain.net:4343
> quota = maildir:User quota
> quota_grace = 10%%
> quota_rule = *:storage=2G
> quota_rule2 = Trash:storage=+10%%
> quota_rule3 = Spam:storage=+20%%
> quota_status_nouser = DUNNO
> quota_status_overquota = 552 5.2.2 Mailbox is full
> quota_status_success = DUNNO
> quota_warning = storage=100%% quota-warning +100 %u
> quota_warning2 = storage=95%% quota-warning +95 %u
> quota_warning3 = storage=80%% quota-warning +80 %u
> quota_warning4 = -storage=100%% quota-warning -100 %u
> sieve = ~/.dovecot.sieve
> sieve_dir = ~/.sieve
> sieve_extensions = +spamtest +spamtestplus +relational
> +comparator-i;ascii-numeric
> stats_refresh = 30 secs
> stats_track_cmds = yes
> }
> protocols = imap pop3 lmtp sieve
> service aggregator {
> fifo_listener replication-notify-fifo {
> mode = 0666
> user = vmail
> }
> unix_listener replication-notify {
> mode = 0666
> user = vmail
> }
> }
> service auth {
> unix_listener auth-userdb {
> group = vmail
> mode = 0660
> user = vmail
> }
> }
> service config {
> unix_listener config {
> user = vmail
> }
> }
> service dict {
> unix_listener dict {
> group = vmail
> mode = 0660
> user = vmail
> }
> user = root
> }
> service doveadm {
> inet_listener {
> port = 4343
> }
> user = vmail
> }
> service imap-login {
> inet_listener imap {
> port = 143
> }
> inet_listener imaps {
> port = 993
> ssl = yes
> }
> }
> service lmtp {
> inet_listener lmtp {
> address = 66.175.xxx.xx 192.168.176.128 127.0.0.1 ::1
> port = 24
> }
> unix_listener /var/spool/postfix/private/dovecot-lmtp {
> group = postfix
> mode = 0600
> user = postfix
> }
> user = vmail
> }
> service managesieve-login {
> inet_listener sieve {
> port = 4190
> }
> service_count = 1
> vsz_limit = 64 M
> }
> service quota-status {
> client_limit = 1
> executable = quota-status -p postfix
> inet_listener {
> port = 12340
> }
> }
> service quota-warning {
> executable = script /usr/local/bin/quota-warning.sh
> unix_listener quota-warning {
> user = vmail
> }
> user = dovecot
> }
> service replicator {
> process_min_avail = 1
> unix_listener replicator-doveadm {
> mode = 0666
> }
> }
> service stats {
> fifo_listener stats-mail {
> mode = 0600
> user = vmail
> }
> }
> ssl_ca = </etc/dovecot/ssl/STAR_domain_net.ca-bundle
> ssl_cert = </etc/dovecot/ssl/STAR_domain_net.crt
> ssl_key = # hidden, use -P to show it
> userdb {
> args = /etc/dovecot/dovecot-ldap.conf.ext
> default_fields = home=/home/vmail/%d/%u
> driver = ldap
> }
> protocol lmtp {
> mail_plugins = " mailbox_alias acl quota stats mail_log notify
> replication sieve"
> postmaster_address = postmaster at domain.email
> }
> protocol lda {
> mail_plugins = sieve quota
> postmaster_address = postmaster at domain.email
> syslog_facility = mail
> }
> protocol imap {
> mail_max_userip_connections = 10
> mail_plugin_dir = /usr/lib/dovecot/modules
> mail_plugins = " mailbox_alias acl quota stats mail_log notify
> replication imap_quota"
> }
> protocol sieve {
> mail_max_userip_connections = 10
> managesieve_implementation_string = Dovecot Pigeonhole
> managesieve_max_line_length = 65536
> }
>
>
> The posted Dovecot configs are identical on both this host and the
> replica host. The only thing I tested but reverted was enabling
> `auth_username_format=%Lu` because I wanted to test logging in with
> username at domain which did work just fine, but I wanted to continue just
> logging in with only the username, so I commented the option and
> restarted dovecot so the option now looks like it does by default.
>
> #auth_username_format=%Lu
>
> Strange thing is that Dovecot appears to be working as expected (i.e
> still retrieving IMAP mail, can authenticate just fine, etc). Could this
> be a bug with my existing version of Dovecot?
>
> While spending time trying to resolve the annoying error I reported in
> the logs I looked over https://www.dovecot.org/doc/NEWS and only found 1
> change for 2.2.32 related to Config:
>
> v2.2.32 2017-08-24
> * config: Log a warning if plugin { key=no } is used explicitly. v2.3
> will support "no" properly in plugin settings, but for now any value at
> all for a boolean plugin setting is treated as "yes", even if it's
> written as explicit "no". This change will now warn that it most likely
> won't work as intended.
>
> Thank You,
> Tony
>
> On 8/25/17 2:39 AM, Aki Tuomi wrote:
>> > On August 25, 2017 at 9:11 AM Tony <tony at kode.email> wrote:
>> >
>> >
>> > Hello,
>> >
>> > Today I started noticing a very odd Dovecot error in the mail logs
>> > across 2 replicated Dovecot hosts via dsync. I have searched the Dovecot
>> > archives, Google, back tracked, downgraded Dovecot to earlier versions
>> > from earlier this year and ruled everything out I could think of to no
>> > avail. There really are not any helpful reports with what I am
>> > specifically seeing. The strange thing is only vmail at domain.net is
>> > repeatedly shown in the log. The error looks like this.
>> >
>> > *Aug 24 22:46:02 orbitron dovecot: config: Error: BUG: Config client
>> > connection sent too much data****Aug 24 22:46:02 orbitron dovecot:
>> > doveadm(vmail at domain.net@domain.net at domain.net@domain.net at domain.net@domain.net at domain.net@domain.net at domain.net):
>> > Fatal: Error reading configuration: read(/var/run/dovecot/config)
>> > failed: read(size=8192) failed: Connection reset by peer***
>> > $ dovecot --version
>> > 2.2.31 (65cde28)
>> >
>> > Dovecot #1: Linux kernel 4.9.36-x86_64
>> > Dovecot #2: Linux kernel 4.12.8-x86_64
>> >
>> > Here are the latest Dovecot updates performed this year.
>> >
>> > [2017-04-29 14:45] [ALPM] upgraded dovecot (2.2.28-2 -> 2.2.28-3)
>> > [2017-05-02 23:05] [ALPM] upgraded dovecot (2.2.28-3 -> 2.2.29.1-1)
>> > [2017-06-11 17:20] [ALPM] upgraded dovecot (2.2.29.1-1 -> 2.2.30.2-1)
>> > [2017-06-30 22:46] [ALPM] upgraded dovecot (2.2.30.2-1 -> 2.2.31-1)
>> >
>> > When Dovecot was last updated back on June 30, I did `systemctl
>> > daemon-reload` but never actually restarted the Dovecot daemon until
>> > what seems like today. The only thing I did today was edit
>> > /etc/dovecot/conf.d/10-auth.conf by simply enabling
>> > "*auth_username_format = %Lu*" which was commented out before I enabled
>> > it. That is the /*only*/ thing that I tested. After I was done testing I
>> > went back and commented out the same thing so it reads
>> > "*#auth_username_format = %Lu*" and of course restarted Dovecot. I
>> > really doubt this has anything to do with what I am reporting as auth is
>> > not the problem in this case.
>> >
>> >
>> > Thank You,
>> >
>> > Tony
>> >
>>
>> Can you provide doveconf -n.
>>
>> Also auth_username_format=%Lu*, why *?
>>
>> Aki</tony at kode.email>
>>
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