Fatal: master: service(imap): child 20258 killed with signal 6 (core not dumped - set service imap { drop_priv_before_exec=yes })

Thu Jul 10 16:03:29 UTC 2014

It looks like on the system that once we hit around 200 imap processes 
it stops there and no more imap processes can be created.  Is there a 
number of max imap processes in the config file somewhere.  By the way 
running on OmniOS:

SunOS mail2 5.11 omnios-6de5e81 i86pc i386 i86pc

On 7/10/14, 9:50 AM, CJ Keist wrote:
> Thanks for the reply. I have seen threads about setting the
> mail_max_userip_connections, I have set this to 5000 and still people
> getting the exceeding connections errorl
>
>
> root at mail2:/userM/mail-services/dovecot/sbin# ./dovecot -n
> # 2.2.13: /userM/mail-services/dovecot/etc/dovecot/dovecot.conf
> # OS: SunOS 5.11 i86pc
> auth_failure_delay = 5 secs
> auth_mechanisms = plain login cram-md5
> auth_worker_max_count = 3000
> base_dir = /userM/mail-services/dovecot/var/run/dovecot/
> disable_plaintext_auth = no
> hostname = mail2.engr.colostate.edu
> 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 duplicate
> 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 {
>    driver = pam
> }
> passdb {
>    driver = passwd
> }
> postmaster_address = cjay at engr.colostate.edu
> service auth {
>    unix_listener /var/lib/postfix/private/auth {
>      mode = 0666
>    }
>    unix_listener auth-userdb {
>      group = postfix
>      mode = 0666
>      user = postfix
>    }
>    user = root
> }
> service imap-login {
>    inet_listener imap {
>      port = 143
>    }
>    inet_listener imaps {
>      port = 993
>      ssl = yes
>    }
> }
> service pop3-login {
>    inet_listener pop3 {
>      port = 110
>    }
>    inet_listener pop3s {
>      port = 995
>      ssl = yes
>    }
> }
> ssl_cert = </userM/mail-services/dovecot/etc/ssl/dovecot.pem
> ssl_key = </userM/mail-services/dovecot/etc/ssl/privkey.pem
> userdb {
>    args = blocking=yes
>    driver = passwd
> }
> protocol imap {
>    mail_max_userip_connections = 5000
> }
> protocol lda {
>    mail_plugins = sieve
> }
>
>
> On 7/10/14, 9:45 AM, Reindl Harald wrote:
>>
>>
>> Am 10.07.2014 17:32, schrieb CJ Keist:
>>> Another problem is people are getting error message from their
>>> clients stating
>>> they have exceeded their number of connections.
>>
>> mail_max_userip_connections = 50
>>
>> well, how much folders do the have
>>
>> keep in mind that fpr IDLE you have one connection per user and folder
>> 10 users with 10 folders behind the same NAT router are 100 connections
>> from the same IP
>>
>>> On 7/10/14, 9:09 AM, CJ Keist wrote:
>>>> Added info:  These errors seem to come from users using mbox format.
>>>>
>>>>
>>>> On 7/10/14, 9:04 AM, CJ Keist wrote:
>>>>> All,
>>>>>     Just move our mail servers over to a new mail server running
>>>>> postfix
>>>>> 2.11.1 and dovecot 2.2.13 and getting the subject line errors in my
>>>>> /var/adm/files.  People are complaining of loosing their
>>>>> connections to
>>>>> the mail server.
>>>>>
>>>>> I've been able to google this error but haven't found fix for this
>>>>> yet.
>>>>>    NOt sure where to put the drop-priv option in the config files
>>>>> either.
>>>>>
>>>>> Any suggestions?
>>>>>
>>>>> Var adm message:
>>>>> Jul 10 08:54:29 mail2 dovecot: [ID 583609 mail.crit] imap(chen):
>>>>> Fatal:
>>>>> master: service(imap): child 20258 killed with signal 6 (core not
>>>>> dumped
>>>>> - set service imap { drop_priv_before_exec=yes })
>>>>>
>>>>> Here is config output:
>>>>>
>>>>> root at mail2:/userM/mail-services/dovecot/sbin# ./dovecot -n
>>>>> # 2.2.13: /userM/mail-services/dovecot/etc/dovecot/dovecot.conf
>>>>> # OS: SunOS 5.11 i86pc
>>>>> auth_failure_delay = 5 secs
>>>>> auth_mechanisms = plain login cram-md5
>>>>> auth_worker_max_count = 300
>>>>> base_dir = /userM/mail-services/dovecot/var/run/dovecot/
>>>>> disable_plaintext_auth = no
>>>>> hostname = mail2.engr.colostate.edu
>>>>> 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 duplicate
>>>>> 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 {
>>>>>     driver = pam
>>>>> }
>>>>> passdb {
>>>>>     driver = passwd
>>>>> }
>>>>> postmaster_address = cjay at engr.colostate.edu
>>>>> service auth {
>>>>>     unix_listener /var/lib/postfix/private/auth {
>>>>>       mode = 0666
>>>>>     }
>>>>>     unix_listener auth-userdb {
>>>>>       group = postfix
>>>>>       mode = 0666
>>>>>       user = postfix
>>>>>     }
>>>>>     user = root
>>>>> }
>>>>> service imap-login {
>>>>>     inet_listener imap {
>>>>>       port = 143
>>>>>     }
>>>>>     inet_listener imaps {
>>>>>       port = 993
>>>>>       ssl = yes
>>>>>     }
>>>>> }
>>>>> service pop3-login {
>>>>>     inet_listener pop3 {
>>>>>       port = 110
>>>>>     }
>>>>>     inet_listener pop3s {
>>>>>       port = 995
>>>>>       ssl = yes
>>>>>     }
>>>>> }
>>>>> ssl_cert = </userM/mail-services/dovecot/etc/ssl/dovecot.pem
>>>>> ssl_key = </userM/mail-services/dovecot/etc/ssl/privkey.pem
>>>>> userdb {
>>>>>     args = blocking=yes
>>>>>     driver = passwd
>>>>> }
>>>>> protocol imap {
>>>>>     mail_max_userip_connections = 50
>>>>> }
>>>>> protocol lda {
>>>>>     mail_plugins = sieve
>>>>> }
>>
>

-- 
C. J. Keist                     Email: cj.keist at colostate.edu
Systems Group Manager           Solaris 10 OS (SAI)
Engineering Network Services    Phone: 970-491-0630
College of Engineering, CSU     Fax:   970-491-5569
Ft. Collins, CO 80523-1301

All I want is a chance to prove 'Money can't buy happiness'