Re: Janusgraph upgrade 0.5.2 --> 0.6.0 | CQL issue
Caused by: com.datastax.oss.driver.api.core.servererrors.UnauthorizedException: Unauthorized. User graph_user has no CREATE permission on <all keyspaces> or any of its parentsThis part of your stacktrace suggests that something changed on your Cassandra cluster or with the graph_user. So, check the CREATE permission, with your admin or try to create a keyspace with nodetool.
Also note that a few changes in cql properties had to be made (but probably not related):
Best wishes, Marc