Dovecot does not close connections

[Benedikt Carda]

The state of the processes according to ps is "S" which means
"interruptible sleep" as far as I know?

What is also interesting is, that the processes, that seem to have this
problem are not shown with the owner name but with the user ID.

Normal imap process in ps aux:
username    10841  0.1  0.1   9148  3472 ?        S    13:18   0:04
dovecot/imap

Imap Processes that seem to be quite old already:
1405     11099  0.0  0.1   8072  2644 ?        S    13:23   0:00
dovecot/imap

But I am not sure if this is really linked to the problem.

Benedikt.



Am 14.10.2016 um 14:08 schrieb Steffen Kaiser:
> On Fri, 14 Oct 2016, Benedikt Carda wrote:
>
> > I am running into this error:
> > /Maximum number of connections from user+IP exceeded
> > (mail_max_userip_connections=10)/
>
> > The suggested solution in hundreds of support requests on this mailing
> > list and throughout the internet is to increase the number of maximum
> > userip connections. But this is not curing the problem, it is just
> > postponing it to the moment when the new limit is reached.
>
> > When i type:
> > /doveadm who//
> > /
>
> > I can see that some accounts have several pids running:
> > /someaccount       10 imap  (25396 25391 25386 25381 25374 7822 7817
> > 5559 5543 5531) (xxx.xxx.xxx.xxx)/
>
> > Now when I check these pids with
> > /ps aux/
>
> > I find out that the oldest pid (5531) has a lifetime of already over 12
> > hours. Anyway I know that the clients that initiated the connections are
> > not connected anymore, so there is no way that there is a valid reason
> > why this connection should still be open.
>
> What's the state of the connection ?
>
>
> -- Steffen Kaiser


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