The abstract schema type is unknown

Have a look at this. It gives some suggesstion for the same case http://java.dzone.com/tips/the-nasty-jpa-unknown-abstract

If you are using Java SE you have to add the fully qualified name of your entity class in persistence.xml, like so

<persistence-unit ...>
    <class>your.custom.package.TestWebProfile</class>
</persistence-unit>

Omitting the package part may lead to your error.