Pyramid: only categorize 500 exceptions as errors (#1137)

Author: nstawski

CHANGELOG.md

@@ -6,7 +6,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased](https://github.com/open-telemetry/opentelemetry-python/compare/v1.12.0rc1-0.31b0...HEAD)
-- Pyramid: Only categorize 400s and 500s exceptions as errors
+- Pyramid: Only categorize 500s server exceptions as errors
   ([#1037](https://github.com/open-telemetry/opentelemetry-python-contrib/issues/1037))
 
 ### Fixed

instrumentation/opentelemetry-instrumentation-pyramid/src/opentelemetry/instrumentation/pyramid/callbacks.py

@@ -15,7 +15,7 @@
 from logging import getLogger
 
 from pyramid.events import BeforeTraversal
-from pyramid.httpexceptions import HTTPError, HTTPException
+from pyramid.httpexceptions import HTTPException, HTTPServerError
 from pyramid.settings import asbool
 from pyramid.tweens import EXCVIEW
 
@@ -198,9 +198,9 @@ def trace_tween(request):
 
                 activation = request.environ.get(_ENVIRON_ACTIVATION_KEY)
 
-                # Only considering HTTPClientError and HTTPServerError
-                # to make sure HTTPRedirection is not reported as error
-                if isinstance(response, HTTPError):
+                # Only considering HTTPServerError
+                # to make sure 200, 300 and 400 exceptions are not reported as error
+                if isinstance(response, HTTPServerError):
                     activation.__exit__(
                         type(response),
                         response,

instrumentation/opentelemetry-instrumentation-pyramid/tests/pyramid_base_test.py

@@ -24,6 +24,8 @@ def _hello_endpoint(request):
         helloid = int(request.matchdict["helloid"])
         if helloid == 500:
             raise exc.HTTPInternalServerError()
+        if helloid == 404:
+            raise exc.HTTPNotFound()
         if helloid == 302:
             raise exc.HTTPFound()
         if helloid == 204:

instrumentation/opentelemetry-instrumentation-pyramid/tests/test_automatic.py

@@ -136,6 +136,27 @@ def test_204_empty_response_is_not_an_error(self):
         span_list = self.memory_exporter.get_finished_spans()
         self.assertEqual(len(span_list), 1)
 
+    def test_400s_response_is_not_an_error(self):
+        tween_list = "pyramid.tweens.excview_tween_factory"
+        config = Configurator(settings={"pyramid.tweens": tween_list})
+        self._common_initialization(config)
+        resp = self.client.get("/hello/404")
+        self.assertEqual(404, resp.status_code)
+        span_list = self.memory_exporter.get_finished_spans()
+        self.assertEqual(len(span_list), 1)
+        self.assertEqual(span_list[0].status.status_code, StatusCode.UNSET)
+
+        PyramidInstrumentor().uninstrument()
+
+        self.config = Configurator()
+
+        self._common_initialization(self.config)
+
+        resp = self.client.get("/hello/404")
+        self.assertEqual(404, resp.status_code)
+        span_list = self.memory_exporter.get_finished_spans()
+        self.assertEqual(len(span_list), 1)
+
 
 class TestWrappedWithOtherFramework(
     InstrumentationTest, TestBase, WsgiTestBase