mysql : unable to create secondary server instance using mysqld - mysql

Question

I am using mysqld to create an new server along with the existing one[ MYSQL 8.0.27 installed with the windows installer] to test data replication
I already have an instance of the server installed [called Mysql80] which is the original server and i am trying to create another server called MyTest using mysqld by reading this documentation which seems simple enough
i have created an empty Data directory to hold my new database and my configuration file for the server is saved as conf.cnf
[MyTest]
port = 3310
datadir = E:/Program Files/Developer/MYSQL/Data/TestFolder/Data
from the windows command line i create the server using their exact instructions
mysqld --defaults-file=E:/conf.cnf --console
--console is used to display debugging information but i always get these error's
021-12-12T17:17:11.844725Z 0 [System] [MY-010116] [Server] E:\Program Files\Developer\MYSQL\Server 8.0\bin\mysqld.exe (mysqld 8.0.27) starting as process 2328
2021-12-12T17:17:11.875406Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2021-12-12T17:17:13.498780Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
mysqld: Table 'mysql.plugin' doesn't exist
2021-12-12T17:17:13.866706Z 0 [ERROR] [MY-010735] [Server] Could not open the mysql.plugin table. Please perform the MySQL upgrade procedure.
2021-12-12T17:17:13.867207Z 0 [Warning] [MY-010441] [Server] Failed to open optimizer cost constant tables
2021-12-12T17:17:13.867617Z 0 [Warning] [MY-010441] [Server] Failed to open optimizer cost constant tables
2021-12-12T17:17:13.868042Z 0 [Warning] [MY-010441] [Server] Failed to open optimizer cost constant tables
2021-12-12T17:17:13.868519Z 0 [Warning] [MY-010441] [Server] Failed to open optimizer cost constant tables
2021-12-12T17:17:13.868926Z 0 [Warning] [MY-010441] [Server] Failed to open optimizer cost constant tables
2021-12-12T17:17:13.869354Z 0 [Warning] [MY-010441] [Server] Failed to open optimizer cost constant tables
2021-12-12T17:17:13.869707Z 0 [Warning] [MY-010441] [Server] Failed to open optimizer cost constant tables
2021-12-12T17:17:13.979431Z 0 [Warning] [MY-010015] [Repl] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2021-12-12T17:17:14.140027Z 0 [Warning] [MY-010015] [Repl] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2021-12-12T17:17:14.172455Z 0 [Warning] [MY-013746] [Server] A deprecated TLS version TLSv1 is enabled for channel mysql_main
2021-12-12T17:17:14.172592Z 0 [Warning] [MY-013746] [Server] A deprecated TLS version TLSv1.1 is enabled for channel mysql_main
2021-12-12T17:17:14.175122Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2021-12-12T17:17:14.175319Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
2021-12-12T17:17:14.176633Z 0 [ERROR] [MY-010262] [Server] Can't start server: Bind on TCP/IP port: Only one usage of each socket address (protocol/netwo k address/port) is normally permitted.
2021-12-12T17:17:14.176755Z 0 [ERROR] [MY-010257] [Server] Do you already have another mysqld server running on port: 3306 ?
2021-12-12T17:17:14.177195Z 0 [ERROR] [MY-010119] [Server] Aborting
2021-12-12T17:17:15.446688Z 0 [System] [MY-010910] [Server] E:\Program Files\Developer\MYSQL\Server 8.0\bin\mysqld.exe: Shutdown complete (mysqld 8.0.27) MySQL Community Server - GPL.
Ignoring the optimizer error's and cannot find table error's the server always tries to start on port 3306 even though i have specified in my conf file it should be on port 3310
Which makes me believe that i typed the config file in the wrong format or i haven't specified enough parameters for the job
any ideas?

Answer 1

Turns out i was doing two things wrong
I had previously upgraded from mysql 8 to 8.27 hence tables were corrupted which explained the Optimization errors
My config wasn't in the correct format
After deleting the MySQL service from windows services and deleting my data directory these 3 steps need to be performed in order
Create an new directory to store Data, your config file , upload directory[To Use commands like LOAD FILE]
The structure looks like this
->Warehouse1
|--->Data
|--->Uploads
|--->MyConfig.cnf
Where MyConfig.cnf looks as follows
[mysqld]
basedir="E:\Program Files\Developer\MYSQL\Server 8.0"
port=3306
datadir="E:\Program Files\Developer\MYSQL\Storage\WareHouse1\Data"
secure-file-priv="E:\Program Files\Developer\MYSQL\Storage\WareHouse1\Uploads"
2)Initialize the data directory from your windows command line using mysqld as follows
mysqld --defaults-file="E:\Program Files\Developer\MYSQL\Storage\WareHouse1\config.cnf" --initialize
3)Finally create an service which you can change in Windows Services window
mysqld --install MySQL81 --defaults-file="E:\Program Files\Developer\MYSQL\Storage\WareHouse1\config.cnf"
Repeat the same steps to create an second server.