Can you create a MySQL JDBC connection string that has different hosts but the same port? (no replies)

Currently, I am unable to get this to work! Here is what I have:

jdbcUrl": "jdbc:mysql://sandbox.mikestest.com:20192,sandbox2.mikestest.com:20192/test?secondsBeforeRetryMaster=5&useSSL=false&user=mike&password=mike"

I only have the first host running and I get a 500 error when trying to write to the database. This same setup works fine when I am on different ports.