[system_tests] Fix flaky debugger tests

tests/debugger/test_debugger_pii.py

@@ -129,6 +129,7 @@ def _setup(self, *, line_probe: bool = False):
 
         while not snapshot_found and retries < self._max_retries:
             self.send_weblog_request("/debugger/pii", reset=(retries == 0))
+            self.wait_for_all_probes(statuses=["EMITTING"])
             snapshot_found = self.wait_for_all_snapshots(timeout=timeout)
             timeout = self._timeout_next
             retries += 1
@@ -154,6 +155,13 @@ def _validate_pii_keyword_redaction(self, excluded_identifiers: list[str] | None
         improperly_redacted = []
         excluded_identifiers = excluded_identifiers if excluded_identifiers else []
 
+        missing = [pid for pid in self.probe_ids if pid not in self.probe_snapshots]
+        if missing:
+            raise AssertionError(
+                f"Expected snapshots for probes {missing} not found. "
+                f"Got snapshots for: {list(self.probe_snapshots.keys())}"
+            )
+
         for probe_id in self.probe_ids:
             base = self.probe_snapshots[probe_id][0]
             snapshot = base.get("debugger", {}).get("snapshot") or base["debugger.snapshot"]

tests/debugger/test_debugger_telemetry.py

@@ -24,11 +24,14 @@ def _setup(self):
 
         if not Test_Debugger_Telemetry.telemetry_data:
             telemetry_type = "app-started"
+            timeout = 5
 
             if self.get_tracer()["language"] == "dotnet":
                 telemetry_type = "app-client-configuration-change"
+                # Dotnet needs more time: RC fetch + apply + send app-client-configuration-change
+                timeout = 25
 
-            Test_Debugger_Telemetry.telemetry_data = self.wait_for_telemetry(telemetry_type)
+            Test_Debugger_Telemetry.telemetry_data = self.wait_for_telemetry(telemetry_type, timeout=timeout)
 
         self.telemetry = Test_Debugger_Telemetry.telemetry_data
 

utils/_context/_scenarios/__init__.py

@@ -790,7 +790,7 @@ class _Scenarios:
             "DD_EXCEPTION_REPLAY_ENABLED": "1",
             "DD_SYMBOL_DATABASE_UPLOAD_ENABLED": "1",
         },
-        library_interface_timeout=5,
+        library_interface_timeout=20,  # 20s: dotnet needs more time for RC + telemetry (reduced flakes)
         doc="Test scenario for checking debugger telemetry.",
         scenario_groups=[scenario_groups.debugger, scenario_groups.telemetry],
     )

utils/_context/_scenarios/debugger.py

@@ -20,7 +20,7 @@ def __init__(self, name: str, doc: str, weblog_env: dict[str, str | None]) -> No
             doc=doc,
             rc_api_enabled=True,
             rc_backend_enabled=True,
-            library_interface_timeout=5,
+            library_interface_timeout=15,  # 15s: debugger snapshots can be slow (reduced flakes)
             weblog_env=base_weblog_env,
             scenario_groups=[scenario_groups.debugger],
         )