record lost events

Author: alexander-alderman-webb

sentry_sdk/tracing.py

@@ -1064,6 +1064,16 @@ def finish(
                     ],
                 )
             )
+            if client.transport:
+                client.transport.record_lost_event(
+                    "event_processor", data_category="transaction"
+                )
+
+                num_spans = len(self._span_recorder.spans) + 1
+                client.transport.record_lost_event(
+                    "event_processor", data_category="span", quantity=num_spans
+                )
+
             self.sampled = False
 
         if not self.sampled:

tests/tracing/test_ignore_status_codes.py

@@ -3,6 +3,8 @@
 
 import pytest
 
+from collections import Counter
+
 
 def test_no_ignored_codes(sentry_init, capture_events):
     sentry_init(
@@ -110,3 +112,28 @@ def test_transaction_not_ignored_when_status_code_has_invalid_type(
         span_or_tx.set_data("http.response.status_code", "404")
 
     assert len(events) == 1
+
+
+def test_records_lost_events(sentry_init, capture_record_lost_event_calls):
+    sentry_init(
+        traces_sample_rate=1.0,
+        trace_ignore_status_codes={
+            404,
+        },
+    )
+    record_lost_event_calls = capture_record_lost_event_calls()
+
+    with start_transaction(op="http", name="GET /"):
+        span_or_tx = sentry_sdk.get_current_span()
+        span_or_tx.set_data("http.response.status_code", 404)
+
+        with start_span(op="child-span"):
+            with start_span(op="child-child-span"):
+                pass
+
+    assert Counter(record_lost_event_calls) == Counter(
+        [
+            ("event_processor", "transaction", None, 1),
+            ("event_processor", "span", None, 3),
+        ]
+    )