dovecot - May 2014 - output of doveconf in conflict with order of settings in conf.d/*-*.conf files

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Hi,

I wanted to enable stats, so I added the settings from 
http://wiki2.dovecot.org/Statistics into conf.d/99-stats.conf:

mail_plugins = $mail_plugins stats
protocol imap {
   mail_plugins = $mail_plugins imap_stats
}
plugin {
   # how often to session statistics
   stats_refresh = 30 secs
   # track per-IMAP command statistics
   stats_track_cmds = yes
}

reloaded dovecot, see output of doveconf -n below, but I got the error:

imap: Error: Can't load plugin imap_stats_plugin: Plugin stats must be 
loaded also (you must set: mail_plugins=$mail_plugins stats)

If I move the line "mail_plugins = $mail_plugins stats" from
99-stats.conf
into 15-stats.conf, the output of doveconf -n looks the same, but the 
stats is working.

I tried finding information about the significance of the order of 
settings - I mean which number should a conf-file has - , but failed in 
the Wiki and mailing list. Is this a bug or should there be a 
documentation?

====
# 2.2.10 (5432b55a2b87): /usr/local/dovecot-2.2.10/etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-5-amd64 x86_64 Debian 6.0.8 
auth_cache_size = 10 M
auth_mechanisms = plain login
base_dir = /var/run/dovecot2.2/
default_vsz_limit = 512 M
deliver_log_format = msgid=%m: %$ %p/%w "%f" "%s"
dict {
   acl = pgsql:/usr/local/dovecot-2.2.10/etc/dovecot/dovecot-dict-sql.conf.ext
   quota = pgsql:/usr/local/dovecot-2.2.10/etc/dovecot/dovecot-dict-sql.conf.ext
}
disable_plaintext_auth = no
instance_name = dovecot2.2
lda_mailbox_autocreate = yes
lmtp_save_to_detail_mailbox = yes
log_path = /var/log/dovecot/dovecot2.2.log
log_timestamp = "%F %H:%M:%S "
mail_gid = vmail
mail_log_prefix = "%Us(%u) [%p]: "
mail_max_userip_connections = 0
mail_plugins = " quota notify mail_log zlib acl stats"
mail_shared_explicit_inbox = yes
mail_uid = vmail
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 imapflags
namespace {
   list = children
   location = maildir:%%h/Maildir:INDEX=~/Maildir/shared/%%u
   prefix = users.%%u.
   separator = .
   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 = 
}
passdb {
   args = /usr/local/dovecot-2.2.10/etc/dovecot/dovecot-ldap.conf.ext
   driver = ldap
}
plugin {
   acl = vfile
   acl_shared_dict = proxy::acl
   antispam_allow_append_to_spam = yes
   antispam_backend = spool2dir
   antispam_spam = SPAM+ReportAsSPAM
   antispam_spool2dir_notspam = /tmp/spamspool/%%020lu-%%05lu-%u-H
   antispam_spool2dir_spam = /tmp/spamspool/%%020lu-%%05lu-%u-S
   antispam_trash = trash;TRASH;Trash;spam;SPAM;Spam;junk;JUNK;Junk;Deleted
Items;Deleted Messages;Gel&APY-schte Elemente;Gel&APY-schte Objekte;Junk
E-mail;Junk-E-Mail;INBOX.Trash;INBOX.TRASH;INBOX.trash
   mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename
   mail_log_fields = uid box msgid size vsize from subject
   quota = dict:User quota::proxy::quota
   quota_rule = *:storage=300MB
   quota_rule2 = Trash:storage=+30M
   recipient_delimiter = +
   sieve = ~/.dovecot.sieve
   sieve_dir = ~/sieve
   sieve_extensions = +imapflags
   sieve_max_actions = 0
   sieve_quota_max_storage = 3M
   stats_command_min_time = 1 mins
   stats_domain_min_time = 12 hours
   stats_ip_min_time = 12 hours
   stats_memory_limit = 128 M
   stats_refresh = 30 secs
   stats_session_min_time = 15 mins
   stats_track_cmds = yes
   stats_user_min_time = 1 hours
}
postmaster_address = postmaster at inf.h-brs.de
protocols = imap pop3 lmtp sieve
quota_full_tempfail = yes
service auth {
   unix_listener auth-client {
     mode = 0766
   }
   unix_listener auth-userdb {
     mode = 0766
     user = vmail
   }
}
service dict {
   unix_listener dict {
     group = vmail
     mode = 0660
     user = vmail
   }
}
service doveadm {
   unix_listener doveadm-server {
     mode = 0666
   }
}
service imap-login {
   process_min_avail = 4
   service_count = 0
   vsz_limit = 768 M
}
service imap {
   process_limit = 10000
   vsz_limit = 768 M
}
service lmtp {
   vsz_limit = 768 M
}
service managesieve-login {
   inet_listener sieve {
     port = 4190
   }
   inet_listener sieve_deprecated {
     port = 2000
   }
}
service pop3-login {
   process_min_avail = 5
   service_count = 0
   vsz_limit = 512 M
}
service stats {
   fifo_listener stats-mail {
     mode = 0600
     user = vmail
   }
}
ssl_ca = </etc/ssl/certs/ca.crt
ssl_cert = </etc/ssl/certs/imap.pem
ssl_key = </etc/ssl/private/imap.key
userdb {
   driver = prefetch
}
userdb {
   args = /usr/local/dovecot-2.2.10/etc/dovecot/dovecot-ldap.conf.ext
   default_fields = home=/home/%u uid=vmail gid=vmail
   driver = ldap
}
verbose_proctitle = yes
protocol lmtp {
   mail_plugins = " quota notify mail_log zlib acl quota sieve"
}
protocol lda {
   mail_plugins = " quota notify mail_log zlib acl quota sieve"
}
protocol imap {
   mail_plugins = " quota notify mail_log zlib acl imap_quota imap_zlib
imap_acl antispam imap_stats"
}

- -- 
Steffen Kaiser
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On Mon, 17 Feb 2014, Steffen Kaiser wrote:

this is also happens for Dovecot v2.2.12 (0ecc40091784), the current hg 
version.

- -- 
Steffen Kaiser
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On Mon, 17 Feb 2014, Steffen Kaiser wrote:

this is also happens for Dovecot v2.2.12 (0ecc40091784), the current hg 
version.

- -- 
Steffen Kaiser
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On 17.2.2014, at 10.58, Steffen Kaiser <skdovecot at smail.inf.fh-brs.de>
wrote:
> I wanted to enable stats, so I added the settings from
http://wiki2.dovecot.org/Statistics into conf.d/99-stats.conf:
> 
> mail_plugins = $mail_plugins stats
> protocol imap {
>  mail_plugins = $mail_plugins imap_stats
> }
> plugin {
>  # how often to session statistics
>  stats_refresh = 30 secs
>  # track per-IMAP command statistics
>  stats_track_cmds = yes
> }
> 
> reloaded dovecot, see output of doveconf -n below, but I got the error:
> 
> imap: Error: Can't load plugin imap_stats_plugin: Plugin stats must be
loaded also (you must set: mail_plugins=$mail_plugins stats)
> 
> If I move the line "mail_plugins = $mail_plugins stats" from
99-stats.conf into 15-stats.conf, the output of doveconf -n looks the same, but
the stats is working.
> 
> I tried finding information about the significance of the order of settings
- I mean which number should a conf-file has - , but failed in the Wiki and
mailing list. Is this a bug or should there be a documentation?
The problem is basically this:

mail_plugins = quota
protocol imap {
  mail_plugin = $mail_plugins imap_quota
}
mail_plugins = $mail_plugins stats

The last global mail_plugins doesn't update the protocol imap { mail_plugins
}. It wouldn't be easy to fix this, and I'm also not sure if it's
even a good idea.

On 2.5.2014, at 15.59, Timo Sirainen <tss at iki.fi> wrote:
>> imap: Error: Can't load plugin imap_stats_plugin: Plugin stats must
be loaded also (you must set: mail_plugins=$mail_plugins stats)
>> 
>> If I move the line "mail_plugins = $mail_plugins stats" from
99-stats.conf into 15-stats.conf, the output of doveconf -n looks the same, but
the stats is working.
Oh, and I don't think this is true. By doing that change the protocol imap {
mail_plugins } will gain the stats plugin.