JIRA builds a connection string from the parameters you enter, and adds some stuff to it that you don't need to tell it.
I suspect that your password contains a character that needs escaping in that string, which breaks the string.
Try changing the password to something without any special characters in it - P3nGu!n for example.
Also, do NOT use root to connect to the database. You should have a dedicated user with standard privileges on the database you're connecting to. jira or jiradb are the usual names I use.
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