Apache shutdown - Couldn't grab mutex

Question

For some reasons unknow to me, Apache is crashing.

This is the apache log at the moment of the crash:

[Sat Jun 02 02:38:05.196006 2018] [mpm_prefork:         


        

Answer 1

You haven't shared the complete log trace. It could be:

[Sun Jul 21 15:49:43 2019] [error] (12)Cannot allocate memory: fork: Unable to fork new process

This is due to low memory and apache failed to create new processes. It also depends on the number of processes you have configured it to fork. It happens when there is too much traffic on to the website.