Kernel update issue with Surgemail

[ralf]

Hi,

I have run Surgemail on my CENTOS 7 server since a long time.
Today I ran into an upgrade issue, after the recently released kernel update from 3.10.0-514.21.1.el7.x86_64 to 3.10.0-514.21.2.el7.x86_64 on my CENTOS server. Upon rebooting, my Surgemail email server cannot not re-start with the new kernel.
I tried two different versions of Surgemail (incl the most recent) and both work with the old kernel and both fail with the new kernel.
A manual start gives:

[root@server1 ~]# /usr/local/surgemail/surgemail_start.sh
kernel.shmmax = 300000000
/usr/local/surgemail/surgemail_start.sh: line 11: ./startmail: Argument list too long
[root@server1 ~]#

Any ideas, or suggestions from your side?
I have asked Surgemail support but I have not received a reply yet (they are normally very responsive - max 24 h)
I don't want to start experimenting and by that blocking the email service, without knowing where to start....

Any help is appreciated!

Thanks!

[TrevorH]

Sounds like another symptom of https://bugs.centos.org/view.php?id=13453

Try reading the linked icinga page from that bug report and see if their workaround can be made applicable to you too.

[ralf]

Thanks Trevor, so it's a real kernel bug, but I don't know how to get around it.
Let's hope the Surgemail team can help me out here.....

[chrispugmire]

As a quick fix remove the 'ulimit' command from
/usr/local/surgemail/surgemail_start.sh
As it is not really required.

ChrisP. (SurgeMail support).

[ralf]

As recommended by Surgemail in a separate email, I edited /usr/local/surgemail/surgemail_start.sh , from the orginal line

ulimit -s 1000

into:

ulimit -s 300000

The server runs now without any problems with the new kernel 3.10.0-514.21.2.el7.x86_64 on my CENTOS 7 server. Problem solved!

Thanks Surgemail support for the great and quick help, even when this is not a problem caused by Surgemail.

BR
Ralf