GHConfiguration can cause a race condition due to non thread safe operations

   private Collection<Long> grantedProjects;
   ...

    public Collection<Long> getGrantedProjects()
    {
        if(grantedProjects != null) return grantedProjects;
        grantedProjects = new HashSet<Long>();

        String projectIds = (String)getDataStorage().get(PROJECT_LIST);
        if(projectIds != null)
        {
            for(String id : projectIds.split(","))
            {
            	grantedProjects.add(Long.valueOf(id));
            }
        }
        
        return grantedProjects;
    }