Add empty tags by default to transaction (#4683)

sl0thentr0py · web-flow · commit 1ddb232b33e0 · 2025-08-07T14:22:56.000+02:00
Seems like some `before_send`s out there might assume tags without safe
access as we found out during dogfooding.
diff --git a/sentry_sdk/opentelemetry/span_processor.py b/sentry_sdk/opentelemetry/span_processor.py
@@ -225,6 +225,7 @@ def _root_span_to_transaction_event(self, span: ReadableSpan) -> Optional[Event]
         if span.resource.attributes:
             contexts[OTEL_SENTRY_CONTEXT] = {"resource": dict(span.resource.attributes)}
 
+        event.setdefault("tags", {})
         event.update(
             {
                 "type": "transaction",

Original file line number	Diff line number	Diff line change
`@@ -225,6 +225,7 @@ def _root_span_to_transaction_event(self, span: ReadableSpan) -> Optional[Event]`
`225`	`225`	`if span.resource.attributes:`
`226`	`226`	`contexts[OTEL_SENTRY_CONTEXT] = {"resource": dict(span.resource.attributes)}`
`227`	`227`
	`228`	`+ event.setdefault("tags", {})`
`228`	`229`	`event.update(`
`229`	`230`	`{`
`230`	`231`	`"type": "transaction",`