[Dovecot] 1.11 bug?: file client-common.c: line 25 (client_unlink): assertion failed: (clients_count > 0)

[Timo Sirainen]

Well. There are two problems: First is that it's crashing, which is  
clearly a bug. It just shouldn't happen. If you upgraded to v1.1.13  
you would probably get a core dump, and that might be useful in  
figuring out the crash (http://dovecot.org/bugreport.html), but the  
real problem appears to be in the Disconnected reason. "Shutting down"  
means that the whole Dovecot is being shut down. Which most likely  
means that something killed dovecot master process. Do you see such a  
line in logs? Probably "Warning: killed with signal <something>".

On Mar 29, 2009, at 11:41 PM, Long Le Dinh wrote:

> Any help on this? It happens more frequently :(. Is this related to  
> LDAP
> authen?
>
> Thanks,
> -
> Long Le
>
>
> On Fri, 2009-03-27 at 13:14 +0700, Long Le Dinh wrote:
>> Hi,
>>
>> I got below log in last 2 days, I have to restart dovecot as pop3- 
>> login failed and service cannot respond.
>>
>> Mar 26 14:19:31 Info: pop3-login: Disconnected: Shutting down (auth  
>> failed, 1 attempts): method=PLAIN, rip=x.x.x.x
>> Mar 26 14:19:31 Info: pop3-login: Disconnected: Shutting down  
>> (tried to use disabled plaintext auth): method=??<B7>
>> Mar 26 14:19:31 Panic: pop3-login: file client-common.c: line 25  
>> (client_unlink): assertion failed: (clients_count > 0)
>> Mar 26 14:19:31 Error: child 31902 (login) killed with signal 6  
>> (ip=x.x.x.x)
>>
>> My system info:
>> dovecot -n
>> # 1.1.11: /etc/dovecot.conf
>> # OS: Linux 2.6.18-8.el5 i686 CentOS release 5 (Final) ext3
>> log_path: /var/log/dovecot.log
>> login_dir: /var/run/dovecot/login
>> login_executable(default): /usr/libexec/dovecot/imap-login
>> login_executable(imap): /usr/libexec/dovecot/imap-login
>> login_executable(pop3): /usr/libexec/dovecot/pop3-login
>> mail_gid: 100
>> mail_location: maildir:/home/%u/Maildir
>> mail_executable(default): /usr/libexec/dovecot/imap
>> mail_executable(imap): /usr/libexec/dovecot/imap
>> mail_executable(pop3): /usr/libexec/dovecot/pop3
>> mail_plugin_dir(default): /usr/lib/dovecot/imap
>> mail_plugin_dir(imap): /usr/lib/dovecot/imap
>> mail_plugin_dir(pop3): /usr/lib/dovecot/pop3
>> auth default:
>>  verbose: yes
>>  debug: yes
>>  passdb:
>>    driver: ldap
>>    args: /etc/dovecot-ldap.conf
>>  userdb:
>>    driver: passwd
>>  userdb:
>>    driver: ldap
>>    args: /etc/dovecot-ldap.conf
>>
>> We're using Maildir format, no NFS. Any help/clue is appreciated.
>>
>> Thanks,
>> -
>> Long Le
>>