improve json_label error handling

Signed-off-by: Zen <[email protected]>

Author: desultory

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "json_exporter"
-version = "0.13.3"
+version = "0.13.4"
 authors = [
   { name="Desultory", email="[email protected]" },
 ]

src/json_exporter/json_endpoint.py

@@ -30,9 +30,13 @@ async def update_json_labels(self):
         try:
             self.json_labels = JSONLabels(**kwargs)
         except MissingJSONKey as e:
+            original_labels = self.json_label_paths.copy()
             self.logger.error("[%s] Failed to find JSON path: %s, removing" % (self.name, e))
-            self.json_label_paths.pop(e.key)
+            removed_key = self.json_label_paths.pop(e.key)
+            self.logger.warning("[%s] Removed JSON path: %s" % (self.name, removed_key))
             await self.update_json_labels()
+            self.logger.info("[%s] Resetting JSON labels to: %s" % (self.name, original_labels))
+            self.json_label_paths = original_labels
 
     def read_config(self):
         """ Reads the config file using the parent method, adds json specific config """