Percona MySQL Server working but filling the messages log with errors

MySQL & MariaDB Percona Server for MySQL 5.7
1

I have Percona MySQL server 5.7 running under CentOS 7 and although mysql is running without any noticeable errors, it is filling my /var/log/messages with the following every ten seconds:

Nov 15 10:07:27 server systemd: mysqld.service holdoff time over, scheduling restart.
Nov 15 10:07:27 server systemd: Starting MySQL Percona Server...
Nov 15 10:07:27 server mysqld_safe: 171115 10:07:27 mysqld_safe Adding '/usr/lib64/libjemalloc.so.1' to LD_PRELOAD for mysqld
Nov 15 10:07:27 server mysqld_safe: 171115 10:07:27 mysqld_safe Logging to '/var/lib/mysql/server.local.err'.
Nov 15 10:07:27 server mysqld_safe: 171115 10:07:27 mysqld_safe A mysqld process already exists
Nov 15 10:07:27 server systemd: mysqld.service: main process exited, code=exited, status=1/FAILURE
Nov 15 10:07:28 server systemd: Failed to start MySQL Percona Server.
Nov 15 10:07:28 server systemd: Unit mysqld.service entered failed state.
Nov 15 10:07:28 server systemd: Triggering OnFailure= dependencies of mysqld.service.
Nov 15 10:07:28 server systemd: mysqld.service failed.
Nov 15 10:07:28 server systemd: Started Service Status Monitor.
Nov 15 10:07:28 server systemd: Starting Service Status Monitor...

Even though it’s stating in there that it failed to start the Percona server, it appears to be working as my website is still doing mysql queries. I know very little about mysql admin and was hoping a Percona mysql guru could shed some light on what is happening. Thanks!

2

Hi balrogchapin,

PS 5.7 under Centos7 doesn’t use mysqld_safe script and in your output I see that it is used. Did you maybe do an upgrade or something else or is it a clean install?
What does “systemctl status mysqld” say?

3

Hi balrogchapin, we’d be interested to learn what you found.