on second thoughts it can go into the final task

inventory_provider/tasks/worker.py

@@ -460,8 +460,7 @@ def update_entry_point(self):
                         (reload_lab_router_config_chorded.s(r)
                          for r in lab_routers),
                         empty_task.si('lab router tasks complete')
-                    )),
-                    collate_netconf_interfaces_all_cache.si().on_error(task_error_handler.s())
+                    ))
                 ),
             ),
             final_task.si().on_error(task_error_handler.s())
@@ -1399,6 +1398,7 @@ def final_task(self):
     _build_snmp_peering_db(update_callback=self.log_info)
     _build_juniper_peering_db(update_callback=self.log_info)
     populate_poller_interfaces_cache(warning_callback=self.log_warning)
+    collate_netconf_interfaces_all_cache(warning_callback=self.log_warning)
 
     latch_db(InventoryTask.config)
     self.log_info('latched current/next dbs')
@@ -1450,7 +1450,6 @@ def populate_poller_interfaces_cache(warning_callback=lambda s: None):
     r.set(all_cache_key, json.dumps(all_populated_interfaces))
 
 
-@app.task(base=InventoryTask, bind=True, name='collate_netconf_interfaces_all_cache')
 @log_task_entry_and_exit
 def collate_netconf_interfaces_all_cache(warning_callback=lambda s: None):
     """