rohdesamuel commented on a change in pull request #12415:
URL: https://github.com/apache/beam/pull/12415#discussion_r472558013



##########
File path: sdks/python/apache_beam/runners/interactive/interactive_runner.py
##########
@@ -152,7 +152,11 @@ def run_pipeline(self, pipeline, options):
               user_pipeline)):
         streaming_cache_manager = ie.current_env().get_cache_manager(
             user_pipeline)
-        if streaming_cache_manager:
+
+        # Only make the server if it doens't exist already.
+        if (streaming_cache_manager and
+            not ie.current_env().get_test_stream_service_controller(

Review comment:
       No, the server is "one-time" use. Once it stops it can't be started up 
again and this should be set None.




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