apache enters defunct state on debian jessie (and wheeze)

[duster at prostreet.net]

Gustav Spellauge kirjoitti 2016-01-19 15:38:
> hello,
> 
> after running for several hours apache enters defunct state.
> 
> root     14707     1 73 Jan08 ?        2-01:36:44 /usr/sbin/apache2 -k 
> start
> www-data 14714 14707  0 Jan08 ?        00:00:01 [apache2] <defunct>
> www-data 14715 14707  0 Jan08 ?        00:00:01 [apache2] <defunct>
> www-data 14716 14707  0 Jan08 ?        00:00:01 [apache2] <defunct>
> www-data 14717 14707  0 Jan08 ?        00:00:01 [apache2] <defunct>
> www-data 14740 14707  0 Jan08 ?        00:00:01 [apache2] <defunct>
> www-data 14741 14707  0 Jan08 ?        00:00:01 [apache2] <defunct>
> www-data 14743 14707  0 Jan08 ?        00:00:01 [apache2] <defunct>
> www-data 14744 14707  0 Jan08 ?        00:00:01 [apache2] <defunct>
> www-data 14746 14707  0 Jan08 ?        00:00:01 [apache2] <defunct>
> www-data 15352 14707  0 Jan08 ?        00:00:00 [apache2] <defunct>
> 
> neither apachectl stop
> nor systemctl stop apache2.service
> 
> will remove the defunct processes
> 
> only systemctl stop apache2.service; kill -9 14707; systemctl start
> apache2.service will arrange it so that there is a working
> apache/roundcubemail.
> 
> kolab was installled using apt-get
> 
> deb http://obs.kolabsys.com/repositories/Kolab:/3.4/Debian_8.0/ ./
> deb 
> http://obs.kolabsys.com/repositories/Kolab:/3.4:/Updates/Debian_8.0/ ./
> 
> the system is up2date.
> 
> what could i do to avoid this unhealthy state to ensure continous
> roundcube operation?

I was testing first time for Kolab and went also Debian install because 
i prefer that OS, clean Debian 8.1 and latest 'stable' Kolab, install 
went ok (some clamav warnings) but every night load went up to 1.00 and 
Apache didn't answer anymore. It might have something to do with 
logrotate someone mention (apache graceful reload).

Anyway my solution to the problem was to install CentOS 7 and problem 
wen't away.

Also, maybe should be new subjecct but every email does get 
"***UNCHECKED**" in subject (both OS), i get it fixed by installing 
clamav and freshclam and update clam DB.

Im my opinion these should get installed & configured via kolab package 
default.

Regards,
Kimmo Hedman