Just wondering if i can get some input from some more experienced Moodle sysadmins out there - I've noticed that our Moodle seems to put out a lot of error notices in our Apache 2 logs - example below. These aren't very helpful as they don't mention a specific module or give any extra detail on the error. I'm seeing around 40 of these every minute but there's no obvious impact on the site speed/problems.
Can anyone comment on whether this is normal?
Example:
[Tue May 23 15:17:02.021595 2017] [:error] [pid 28630] [client XXX.XX.XX.XX:50340] 2015111610