[DMS-867] Fix clients all sharing one socket pool

src/edfi-performance-test/edfi_performance_test/tasks/ed_fi_task_set.py

@@ -56,8 +56,14 @@ def __init__(self, parent, *args, **kwargs):
 
         self.client_class = self.generate_client_class()
 
+        # Prefer the Locust user's HTTP client so every simulated user maintains its own
+        # socket pool. Fall back to the shared class attribute for backwards compatibility.
+        locust_http_client = getattr(getattr(self, "user", None), "client", None)
+        if locust_http_client is None:
+            locust_http_client = EdFiAPIClient.client
+
         self._api_client: EdFiAPIClient = self.client_class(
-            client=EdFiAPIClient.client, token=EdFiAPIClient.token
+            client=locust_http_client, token=EdFiAPIClient.token
         )
 
     def __getattr__(self, item):

src/edfi-performance-test/edfi_performance_test/tasks/volume/volume_tests.py

@@ -40,10 +40,13 @@ class VolumeTestUser(FastHttpUser):
     volume_test_root_namespace: str = "edfi_performance_test.tasks.volume."
 
     def on_start(self):
+        # Always associate the current user's HTTP client with the EdFiAPIClient so that
+        # every simulated Locust user maintains its own socket/connection pool.
+        EdFiAPIClient.client = self.client
+
         if VolumeTestUser.is_initialized:
             return
 
-        EdFiAPIClient.client = self.client
         EdFiAPIClient.token = None
 
         # Import root pipeclean modules