Performance Center intalled with Errors

Document ID : KB000103838
Last Modified Date : 29/06/2018
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After install process finish figures a message saying "Installed with errors": 

Error: Failure to detect datasource: EVENT_MANAGERException: Server returned HTTP response code: 503 for URL: http://localhost:8181/pc/center/webservice/datasources/ 

2018-06-28T17:47:40.979015Z 0 [ERROR] Can't start server: Bind on TCP/IP port: Address already in use 
2018-06-28T17:47:40.979021Z 0 [ERROR] Do you already have another mysqld server running on port: 3306 ? 
2018-06-28T17:47:40.979032Z 0 [ERROR] Aborting 
We checked the system by running:
ps -ef | grep -i mysql 
There was another mysql server running on the system. This instance needs to be removed and then a uninstall and reinstall of mySql and CAPC need to be performed.