The Issue Tracking system for the Coherence Hibernate Integration project is hosted by java.net.
It can be found here: http://java.net/jira/browse/COHHIB
To raise an issue representing a defect or feature request in the issue tracking system you need to have a java.net account. These are free. They don't require any personal information beyond that of an email address to confirm registration.
To resolve and close issues with the issue tracking system you will need to be a contributor.