Apache Too many open files: mod_fcgid: Can’t create pipe between PM and stub

I have a CentOS 7 web server running Apache 2.4. Up until yesterday, everything was functioning normally, but today, I cannot restart httpd, since I get the following two errors: [fcgid:error] [pid 9610] (24)Too many open files: mod_fcgid: Can’t create pipe between PM and stub [fcgid:emerg] [pid 9610] (24)Too many open files: mod_fcgid: Can’t initialize…