fix: metric timer initialization with bad default (#5339)

jina-ai · Nov 2, 2022 · a38705d · a38705d
1 parent a9ef7bc
commit a38705d
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/jina/serve/instrumentation/__init__.py b/jina/serve/instrumentation/__init__.py
@@ -138,8 +138,10 @@ def __init__(
         self,
         summary_metric: Optional['Summary'],
         histogram: Optional['Histogram'],
-        histogram_metric_labels: Dict[str, str] = {},
+        histogram_metric_labels: Optional[Dict[str, str]] = None,
     ) -> None:
+        if histogram_metric_labels is None:
+            histogram_metric_labels = {}
         self._summary_metric = summary_metric
         self._histogram = histogram
         self._histogram_metric_labels = histogram_metric_labels