Error: conn unix:/run/dovecot/stats-writer : Timeout waiting for handshake response

[Aki Tuomi]

> On 14/07/2022 22:09 EEST filipe at digirati.com.br <filipe at digirati.com.br> wrote:
> 
> 
> Hi, I'm using ubuntu 22.04 and installed dovecot 2.3.16.
>  
>  I did some initial testing with 100 email accounts and everything seemed to work perfectly the same as dovecot version 2.3.16 on another server.
>  So I performed the migration of approximately 30 thousand email accounts, but the following error started to appear and I know well what to do:
> > Jul 14 18:55:29 box5 dovecot: pop3: Error: conn unix:/run/dovecot/stats-writer (pid=3733995,uid=0): Timeout waiting for handshake response
> >  Jul 14 18:55:29 box5 dovecot: imap: Error: conn unix:/run/dovecot/stats-writer (pid=3733995,uid=0): Timeout waiting for handshake response
> >  Jul 14 18:55:29 box5 dovecot: managesieve: Error: conn unix:/run/dovecot/stats-writer (pid=3733995,uid=0): Timeout waiting for handshake response
> >  Jul 14 18:55:29 box5 dovecot: lmtp: Error: conn unix:/run/dovecot/stats-writer (pid=3733995,uid=0): Timeout waiting for handshake response
> >  Jul 14 18:55:29 box5 dovecot: imap-login: Error: conn unix:/run/dovecot/stats-writer (pid=3733995,uid=0): Timeout waiting for handshake response
> >  Jul 14 18:55:29 box5 dovecot: imap: Error: conn unix:/run/dovecot/stats-writer (pid=3733995,uid=0): Timeout waiting for handshake response
> >  Jul 14 18:55:29 box5 dovecot: imap-login: Error: conn unix:/run/dovecot/stats-writer (pid=3733995,uid=0): Timeout waiting for handshake response
> >  Jul 14 18:55:29 box5 dovecot: message repeated 3 times: [ imap-login: Error: conn unix:/run/dovecot/stats-writer (pid=3733995,uid=0): Timeout waiting for handshake response]
> >  Jul 14 18:55:29 box5 dovecot: imap: Error: conn unix:/run/dovecot/stats-writer (pid=3733995,uid=0): Timeout waiting for handshake response
> >  Jul 14 18:55:29 box5 dovecot: message repeated 2 times: [ imap: Error: conn unix:/run/dovecot/stats-writer (pid=3733995,uid=0): Timeout waiting for handshake response]
> > 
> Permissions on files
> 
> > 79411 srw------- 1 root root 0 Jul 14 18:55 stats-reader
> >  79412 srw-rw---- 1 root dovecot 0 Jul 14 18:55 stats-writer
> > 
> 
> 
> Does anyone know anything about this problem that can help me?
>

Do you have anything else in the logs? Did you increase client_limit for stats service?

Aki