SOLVED Dovecot Imap: Warning: fd limit (ulimit -n) is lower than required under max

martin MHC

Well-Known Member
Sep 14, 2016
195
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UK
cPanel Access Level
Root Administrator
Hello

When editing the WHM » Home »Service Configuration »Mailserver Configuration

and saving; the notice:


dovecot: Warning: fd limit (ulimit -n) is lower than required under max. load (1024 < 1100), because of service auth { client_limit }
Is displayed. However despite adjusting some settings in "Mailserver Configuration" I can't seem to adjust either value (client_limit or fd limit ).

Things I have done:

I have read this post: Warning: fd limit is lower than required under max. load but the solution offered (CMD update in Terminal of ulimit -n <number> ) does not change values (including after restarting services).

I have read this post: Starting Dovecot Imap: Warning: fd limit (ulimit -n) is lower than required under max and Shell Fork Bomb Protection IS enabled on my server and I am not keen on turning this off (due to users and terminal etc.) .

I have read this post: dovecot error and the solution offered of editing the Dovecot 2.2 template file -- this has been done, but no
"default_client_limit" value exists in the template, however I can adjust the "client_limit" in the /etc/dovecot/dovecot.conf file, setting it to a value below 1024 ( 1000 ) but now presents a different message when restarting dovecot:

doveconf: Warning: service auth { client_limit=1000 } is lower than required under max. load (1100)
Changing the same value to a value above 1100 results in the first error above.

How do I correctly resolve this issue?

Cheers
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,913
2,205
363
Hello @martin MHC,

Can you verify which cPanel & WHM version is installed on this system? Also, which release tier is the affected system configured to use?

Thank you.
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,913
2,205
363
This is WHM 76.0.11 on the Recommended tier (just about to be updated to WHM 78, so will see if this blip is ironed out on that update).
Let me know if the issue persists on version 78. We included a change to increase the Dovecot RLimit value as part of CPANEL-25070.

Thank you.
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,913
2,205
363
Hi Martin,

I'm glad to see the issue is no longer occurring in version 78. I've marked this thread as solved.

Thank you.