What's this indicate: "exit(communication error), get unexpected signal 7"

This afternoon I updated my wordpress to 4.01.

After that, I've been getting some internal server errors. On and off. I can load pages 20 times, then get an error, then reload the page and all is ok again.

When I tail -f error_log I get:

[Thu Nov 20 23:17:37 2014] mod_fcgid: process /home/mysite/fcgi-bin/php5.fcgi(8900) exit(communication error), get unexpected signal 7
[Thu Nov 20 23:17:41 2014] mod_fcgid: process /home/mysite/fcgi-bin/php5.fcgi(8901) exit(communication error), get unexpected signal 7
[Thu Nov 20 23:17:47 2014] mod_fcgid: process /home/mysite/fcgi-bin/php5.fcgi(8904) exit(communication error), get unexpected signal 7

Does that help to narrow down what the problem might be related to?

Chris
St_Aug_Beach_BumAsked:
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andreasSystem AdminCommented:
Do you have APC running? If so try to disable it and test again. APC can cause this errors with fastcgi.
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St_Aug_Beach_BumAuthor Commented:
Thank you... I'll try this if it starts happening again.

I don't know what changed, but during the night the errors stopped. Cold. From every few seconds to none. I've asked my users to report any further internal server errors and none have been reported since the errors stopped.

I do use apc on the server and wp super-cache on the site, and wonder if something was stuck in cache in one or the other and finally cleared out?

Chris
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