I have a cPanel, Centos 7 webserver using MySQL 5.6, in which I am trying to output the MySQL general log to a named pipe I have created. I have not had any issues creating the pipe and can write to other replacement log files in the MySQL directory without issues.

However when I create a named pipe and set this as the log file (How do I output MySQL logs to syslog?) I get this error in my errorlog on a restart:

[ERROR] Could not open /var/lib/mysql/server1.log for logging (error 2). Turning logging off for the whole duration of the MySQL server process. To turn it on again: fix the cause, shutdown the MySQL server and restart it. 

I have set the owner and group of the named pipe to the mysql user and the permissions to 660 (and even 777 to be sure). These same permissions seem to work fine for a normal log file.

Any suggestions as to what I have done wrong?