kolab3 locks up every 2 days

[JP Horst]

Hello

as reported before on the German kolab-users list before:
Almost every 2 days postfix runs into authentication problems with ldap (on 
Centos6.3). After the first occurrence Kolab3 locks-up from user perspective.
Only a manual restart via root solves the matter for the next two days.
This way Kolab3 is too unstable for production environment.

The maillog shows the following:


Occurence #4:

Feb 26 14:19:57 golgi2 imap[18636]: ptload returning data
Feb 26 14:19:57 golgi2 imap[18636]: canonified suhle at sciencebridge.de -> 
suhle at sciencebridge.de
Feb 26 14:20:20 golgi2 imap[18642]: accepted connection
Feb 26 14:20:20 golgi2 master[18665]: about to exec /usr/lib/cyrus-imapd/imapd
Feb 26 14:20:20 golgi2 imap[18665]: executed
Feb 26 14:20:20 golgi2 imap[18665]: IOERROR: opening 
/var/lib/imap/user_deny.db: No such file or directory
Feb 26 14:20:20 golgi2 imap[18642]: imapd:Loading hard-coded DH parameters
Feb 26 14:20:20 golgi2 imap[18642]: SSL_accept() incomplete -> wait
Feb 26 14:20:20 golgi2 imap[18642]: SSL_accept() succeeded -> done
Feb 26 14:20:20 golgi2 imap[18642]: starttls: TLSv1 with cipher DHE-RSA-
AES256-SHA (256/256 bits new) no authentication
Feb 26 14:20:20 golgi2 imap[18642]: client id: "name" "Roundcube" "version" 
"0.9-beta" "php" "5.3.10" "os" "Linux" "command" "/roundcubemail/"
Feb 26 14:20:20 golgi2 imap[18642]: ptload(): fetched cache record 
(suhle at sciencebridge.de)(mark 1361884184, current 1361884820, limit 
1361874020)
Feb 26 14:20:20 golgi2 imap[18642]: ptload returning data
Feb 26 14:20:20 golgi2 imap[18642]: canonified suhle at sciencebridge.de -> 
suhle at sciencebridge.de
Feb 26 14:21:22 golgi2 clamd[2579]: SelfCheck: Database status OK.
Feb 26 14:21:38 golgi2 postfix/smtpd[18669]: connect from localhost[::1]
Feb 26 14:21:48 golgi2 postfix/trivial-rewrite[18670]: warning: 
dict_ldap_connect: Unable to bind to server ldap://localhost:389 as uid=kolab-
service,ou=Special Users,dc=sciencebridge,dc=de: -5 (Timed out)
Feb 26 14:21:48 golgi2 postfix/trivial-rewrite[18670]: fatal: 
ldap:/etc/postfix/ldap/mydestination.cf(0,lock|fold_fix): table lookup problem


Occurence #5:
Feb 28 11:19:54 golgi2 imaps[21335]: accepted connection
Feb 28 11:19:54 golgi2 master[21338]: about to exec /usr/lib/cyrus-imapd/imapd
Feb 28 11:19:54 golgi2 imaps[21338]: executed
Feb 28 11:19:54 golgi2 imaps[21338]: IOERROR: opening 
/var/lib/imap/user_deny.db: No such file or directory
Feb 28 11:19:54 golgi2 imaps[21335]: imapd:Loading hard-coded DH parameters
Feb 28 11:19:54 golgi2 imaps[21335]: SSL_accept() incomplete -> wait
Feb 28 11:19:54 golgi2 imaps[21335]: SSL_accept() succeeded -> done
Feb 28 11:19:54 golgi2 imaps[21335]: starttls: TLSv1 with cipher DHE-RSA-
AES256-SHA (256/256 bits new) no authentication
Feb 28 11:19:54 golgi2 imaps[21335]: ptload(): fetched cache record (cyrus-
admin)(mark 1362039999, current 1362046794, limit 1362035994)
Feb 28 11:19:54 golgi2 imaps[21335]: ptload returning data
Feb 28 11:19:54 golgi2 imaps[21335]: canonified cyrus-admin -> cyrus-admin
Feb 28 11:19:54 golgi2 ctl_cyrusdb[21337]: done checkpointing cyrus databases
Feb 28 11:19:54 golgi2 master[2515]: process 21337 exited, status 0
Feb 28 11:19:57 golgi2 postfix/smtpd[21334]: warning: dict_ldap_connect: Unable 
to bind to server ldap://localhost:389 as uid=kolab-service,ou=Special 
Users,dc=sciencebridge,dc=de: -5 (Timed out)
Feb 28 11:19:57 golgi2 postfix/smtpd[21334]: fatal: 
ldap:/etc/postfix/ldap/mydestination.cf(0,lock|fold_fix): table lookup problem
Feb 28 11:19:58 golgi2 postfix/master[2665]: warning: process 
/usr/libexec/postfix/smtpd pid 21334 exit status 1
Feb 28 11:19:58 golgi2 postfix/master[2665]: warning: 
/usr/libexec/postfix/smtpd: bad command startup -- throttling

Helpful suggestions are appreciated.
Kind regards,
Jens-Peter
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