Apache httpd process crashed with "(43)Identifier removed: AH00144: couldn't grab the accept mutex" on RHEL 7.2

Issue

Apache httpd process crashed with the following mutex error on RHEL 7.2:

[mpm_prefork:emerg] [pid 9629] (43)Identifier removed: AH00144: couldn't grab the accept mutex
[mpm_prefork:emerg] [pid 9659] (43)Identifier removed: AH00144: couldn't grab the accept mutex
[mpm_prefork:emerg] [pid 9623] (43)Identifier removed: AH00144: couldn't grab the accept mutex
[mpm_prefork:emerg] [pid 9950] (43)Identifier removed: AH00144: couldn't grab the accept mutex
[mpm_prefork:emerg] [pid 9626] (43)Identifier removed: AH00144: couldn't grab the accept mutex
[core:alert] [pid 25888] AH00050: Child 9623 returned a Fatal error... Apache is exiting!
[mpm_prefork:emerg] [pid 9628] (22)Invalid argument: AH00146: couldn't release the accept mutex