Phil, There is a 'modify the data' Component Access Policy. Use the key icon in the Operate palette (or right-click on the component) to access the Component Access Policies as opposed to using the Global Menu in the upper right to access Global Access Policies.
The user will be able to empty a queue if they are in the 'modify the data' policy for the upstream component (processor) which generated the data. This policy does not allow the user to delete the connection between processors. To do so requires the 'modify the component' policy. One additional nuance to consider: if you are operating a NiFi Cluster, you will need to add each of the cluster nodes to the 'modify the data' policy as well. This is required because the request to empty a queue is proxied from the node being used to access the UI out to the remaining nodes. -Mark On Thu, Jun 4, 2020 at 6:52 AM Phil H <gippyp...@gmail.com> wrote: > Hi Andy, > > Thanks for your reply. I don’t recall seeing the modify data policy in the > user interface. Is it possible this is something I would have to change at > the back end? > > I don’t have the system in front of me now, will have to confirm tomorrow. > > Regards, > Phil > > On Thu, 4 Jun 2020 at 11:18, Andy LoPresto <alopre...@apache.org> wrote: > > > Hi Phil, > > > > You might have uncovered a gap in the permission policy. Have you tried > > using the “modify the data” permission [1]? If a user does not have write > > permission to the queue, I think they can empty it but not modify/delete > > the queue itself. > > > > I am speculating here because I haven’t had a chance to verify, but I > > suspect that the same write permission which allows a user to clear the > > queue would allow them to delete it as well. This may be something we > could > > mitigate by using the “operate” permission, but I would have to validate > > this behavior first. > > > > Hope this helps for now. > > > > [1] > > > https://nifi.apache.org/docs/nifi-docs/html/administration-guide.html#component-level-access-policies > > > > Andy LoPresto > > alopre...@apache.org > > alopresto.apa...@gmail.com > > He/Him > > PGP Fingerprint: 70EC B3E5 98A6 5A3F D3C4 BACE 3C6E F65B 2F7D EF69 > > > > > On Jun 3, 2020, at 4:08 PM, Phil H <gippyp...@gmail.com> wrote: > > > > > > Hi there, > > > > > > I am trying to stratify my userbase. I need to allow certain > users/groups > > > the ability to clear queues, but cannot find the right policy to allow > > that > > > without also allowing them to delete queues, which I absolutely don’t > > want > > > to do. > > > > > > Am currently using 1.9.2 (putting off the upgrade process!) > > > > > > Regards, > > > Phil > > > > >
