I am using AWS MySQL RDS for my application. Last few days every day my RDS password is reset. Every day, I need to reset master password for my RDS. Is there any solution?
Amazon RDS will not automatically reset your password. Either somebody is changing it, or you have an automated process that is changing it.
If it is the Master password that is changing, you should be able to find a ModifyDbInstance call in your AWS CloudTrail log. It will show the credentials that were used to issue the modify command.