'hibernate.dialect' must be set when no Connection available error

Question

I am getting the following error when using Hibernate:

\'hibernate.dialect\' must be set when no Connection available

And I am using a datasource fo

Answer 1

The issue could be that you haven't installed the client library for the database you are trying to connect to.

I have a Spring application that does not have a persistence.xml file and therefore no hibernate.dialect declaration.

Once I installed the MySQL Connector/J client library the error went away.

EDIT: I've also gotten this error when the database server wasn't running. Something that often happens now that I run my MySQL server through MAMP.