Example

public static class BeanClass implements javax.ejb.SessionBean {
private static final Collection ejbFindByPrimaryKey (String key) throws FinderException{
//..
}
//methods that must implement the interface
}

Solution
Declare finder methods as public and non-static nor final


public class BeanClass implements javax.ejb.SessionBean {
public Collection ejbFindByPrimaryKey (String key) throws FinderException{
//..
}
//methods that must implement the interface
}