Fix error handling

sky/skylet/providers/azure/node_provider.py

@@ -83,21 +83,20 @@ def __init__(self, provider_config, cluster_name):
     def _get_filtered_nodes(self, tag_filters):
         # add cluster name filter to only get nodes from this cluster
         cluster_tag_filters = {**tag_filters, TAG_RAY_CLUSTER_NAME: self.cluster_name}
-
         def match_tags(vm):
             for k, v in cluster_tag_filters.items():
                 if vm.tags.get(k) != v:
                     return False
             return True
 
         try:
-            vms = self.compute_client.virtual_machines.list(
+            vms = list(self.compute_client.virtual_machines.list(
                 resource_group_name=self.provider_config["resource_group"]
-            )
-        except azure.exceptions().HttpResponseError as e:
-            if e.reason == "ResourceGroupNotFound":
-                logger.debug("Resource group not found. VMs should be " "terminated.")
-                vms = {}
+            ))
+        except azure.exceptions().ResourceNotFoundError as e:
+            if "Code: ResourceGroupNotFound" in e.exc_msg:
+                logger.debug("Resource group not found. VMs should be terminated.")
+                vms = []
             else:
                 raise