dovecot - Sep 2011 - lmtp -- save failed to INBOX: BUG: Unknown internal error

I've had 18 instances of this error the last 24 hours:

	Sep  8 08:56:00 popimap1 dovecot::  lmtp(10529, first.last at example.om):
mGdAOtdlaE4hKQAAg/aw4w: msgid=<B8FA3D5B230184409450D51D522678404E5052 at
ASP-EX02.ASP.lan>: save failed to INBOX: BUG: Unknown internal error

17 on lmtp-server A, and one on lmtp-server B.

On server A it was a message with 55 recepients, where 17 failed
initially -- and the was then successfully delivered. 
	
	lmtp pid 10529, 08:55:57-08:56:01 - 11 successfull deliveries, 17 BUGs
	lmtp pid 10609, 08:56:00	- 1 successfull deliveries
	lmtp pid 31291, 08:56:06	- 2 successfull deliveries
	lmtp pid 10482, 08:56:04-06	- 3 successfull deliveries
	lmtp pid 6738,  08:56:06	- 1 successfull deliveries
	lmtp pid 24488, 08:56:06-07	- 5 successfull deliveries
	lmtp pid 7101,  08:56:01-07	- 19 successfull deliveries
	lmtp pid 21330, 08:56:08	- 1 successfull deliveries
	lmtp pid 2177,  08:56:09	- 3 successfull deliveries
	lmtp pid 7085,  08:56:10	- 3 successfull deliveries
	lmtp pid 6633,  08:56:08-10	- 6 successfull deliveries


The one on lmtp-server B was a different msgid from A, and also had
several recepients (6). It was successfully delivered to the recepient
that initially failed the same second.

Config here:

# 2.0.14: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.18-194.26.1.el5 x86_64 Red Hat Enterprise Linux Server release
5.5 (Tikanga)
auth_verbose = yes
auth_verbose_passwords = sha1
disable_plaintext_auth = no
mail_gid = 3000
mail_location = maildir:~/:INDEX=/indexes/%1u/%1.1u/%u
mail_plugins = quota
mail_uid = 3000
mmap_disable = yes
namespace {
  inbox = yes
  location = 
  prefix = INBOX.
  type = private
}
passdb {
  args = /etc/dovecot/dovecot-ldap.conf.ext
  driver = ldap
}
plugin {
  quota = maildir:User quota
}
service auth-worker {
  user = $default_internal_user
}
service auth {
  client_limit = 4396
}
service imap-login {
  inet_listener imap {
    address = *
    port = 143
  }
}
service imap {
  executable = /usr/local/sbin/imap-wrapper.sh
  process_limit = 2048
}
service lmtp {
  client_limit = 1
  inet_listener lmtp {
    address = *
    port = 24
  }
  process_limit = 25
}
service pop3-login {
  inet_listener pop3 {
    address = *
    port = 110
  }
}
service pop3 {
  executable = /usr/local/sbin/pop-wrapper.sh
  process_limit = 2048
}
ssl = no
userdb {
  args = /etc/dovecot/dovecot-ldap.conf.ext
  driver = ldap
}
protocol lmtp {
  mail_plugins = quota
}
protocol imap {
  imap_client_workarounds = delay-newmail
  mail_plugins = quota imap_quota
}
protocol pop3 {
  mail_plugins = quota
  pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
  pop3_uidl_format = UID%u-%v
}


  -jf

On Thu, 2011-09-08 at 09:56 +0200, Jan-Frode Myklebust
wrote:
> I've had 18 instances of this error the last 24 hours:
> 
> 	Sep  8 08:56:00 popimap1 dovecot::  lmtp(10529, first.last at example.om):
mGdAOtdlaE4hKQAAg/aw4w: msgid=<B8FA3D5B230184409450D51D522678404E5052 at
ASP-EX02.ASP.lan>: save failed to INBOX: BUG: Unknown internal error
Hmm. These are pretty annoying to find. I looked through the sources
and.. Well, found one possible reason for it. Try applying these patches
and see what it says then:

http://hg.dovecot.org/dovecot-2.0/raw-rev/858298eb101f
http://hg.dovecot.org/dovecot-2.0/raw-rev/323ab62983b6

Or were there any actual errors logged before this message?