Apache log error

[Vvierg]

I use ispmanager hosting panel and in Apache logs I periodically see an error of the following kind

Fatal Error Unable to create lock file: Bad file descriptor (9)

Tell me please, is it something to do with lack of limits? Or what other reasons could it be caused by?

 

[Alexzee]

Maybe the workaround will prove positive for you? Not sure.

https://support.cpanel.net/hc/en-us/articles/360051787413-Apache-Fatal-Error-Unable-to-create-lock-file-Bad-file-descriptor-9-

 

[dos2unix]

My first four thoughts are...

permissions. - does the user apache runs as ( usually apache ) have permissions to the directory where the lock files are created?

disk space - are you out of disk space?

file descripter limit - what is the output of ...

ulimit -n

Is SElinux or AppArmor blocking writes to that directory.
To test this, you can temporarily disable these and see if the error goes away.