aiohttp-client: Allow overriding of span status (open-telemetry#1394)

Author: nils-borrmann-y42

CHANGELOG.md

@@ -18,6 +18,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Fix bug in Urllib instrumentation - add status code to span attributes only if the status code is not None. 
   ([#1430](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/1430))
+- `opentelemetry-instrumentation-aiohttp-client` Allow overriding of status in response hook. 
+  ([#1394](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/1394))
 - `opentelemetry-instrumentation-pymysql` Fix dbapi connection instrument wrapper has no _sock member.
   ([#1424](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/1424))
 - `opentelemetry-instrumentation-dbapi` Fix the check for the connection already being instrumented in instrument_connection().

instrumentation/opentelemetry-instrumentation-aiohttp-client/src/opentelemetry/instrumentation/aiohttp_client/__init__.py

@@ -232,12 +232,13 @@ async def on_request_exception(
         if trace_config_ctx.span is None:
             return
 
-        if callable(response_hook):
-            response_hook(trace_config_ctx.span, params)
-
         if trace_config_ctx.span.is_recording() and params.exception:
             trace_config_ctx.span.set_status(Status(StatusCode.ERROR))
             trace_config_ctx.span.record_exception(params.exception)
+
+        if callable(response_hook):
+            response_hook(trace_config_ctx.span, params)
+
         _end_trace(trace_config_ctx)
 
     def _trace_config_ctx_factory(**kwargs):