BeanPath.casts should be made safe for concurrent usage
This and other instance fields in the hierarchy appear to make this usage pattern non-threadsafe...
JPAQuery query = getQuery();
QPartner partner = QPartner.partner; // not threadsafe due to static implementation
Partner p = query.from(partner)....
Ie, implementing a repository pattern may not be reliable.
Why do you think is the usage of the static default variable non threadsafe?