fix: restore timeout and fix celery test infrastructure

- Re-add timeout=1.0 to ws_manager pubsub loop (prevents CPU spin)
- Use Redis for Celery tests (memory:// broker doesn't support chords)
- Add timeout param to in-memory subscriber mock
- Remove duplicate celery_includes fixture from rtc_ws tests

server/reflector/ws_manager.py

@@ -97,9 +97,10 @@ class WebsocketManager:
 
     async def _pubsub_data_reader(self, pubsub_subscriber):
         while True:
-            # No timeout - global singleton prevents CPU hog from multiple instances
+            # timeout=1.0 prevents tight CPU loop when no messages available
             message = await pubsub_subscriber.get_message(
-                ignore_subscribe_messages=True
+                ignore_subscribe_messages=True,
+                timeout=1.0,
             )
             if message is not None:
                 room_id = message["channel"].decode("utf-8")
@@ -109,10 +110,8 @@ class WebsocketManager:
                     await socket.send_json(data)
 
 
-# Process-global singleton (not thread-local)
+# Process-global singleton to ensure only one WebsocketManager instance exists.
-# The original threading.local() pattern was broken - it created a NEW
+# Multiple instances would cause resource leaks and CPU issues.
-# threading.local() object on every call, so caching never worked.
-# This caused infinite ws_manager instances → resource leaks → CPU hog.
 _ws_manager: WebsocketManager | None = None
 
 

server/tests/conftest.py

@@ -1,6 +1,5 @@
 import os
 from contextlib import asynccontextmanager
-from tempfile import NamedTemporaryFile
 from unittest.mock import patch
 
 import pytest
@@ -333,10 +332,17 @@ def celery_enable_logging():
 
 @pytest.fixture(scope="session")
 def celery_config():
-    with NamedTemporaryFile() as f:
+    # Use Redis for chord/group task execution (memory:// broker doesn't support chords)
+    # Redis must be running - start with: docker compose up -d redis
+    import os
+
+    redis_host = os.environ.get("REDIS_HOST", "localhost")
+    redis_port = os.environ.get("REDIS_PORT", "6379")
+    # Use db 2 to avoid conflicts with main app
+    redis_url = f"redis://{redis_host}:{redis_port}/2"
     yield {
-            "broker_url": "memory://",
+        "broker_url": redis_url,
-            "result_backend": f"db+sqlite:///{f.name}",
+        "result_backend": redis_url,
     }
 
 
@@ -370,9 +376,12 @@ async def ws_manager_in_memory(monkeypatch):
         def __init__(self, queue: asyncio.Queue):
             self.queue = queue
 
-        async def get_message(self, ignore_subscribe_messages: bool = True):
+        async def get_message(
+            self, ignore_subscribe_messages: bool = True, timeout: float | None = None
+        ):
+            wait_timeout = timeout if timeout is not None else 0.05
             try:
-                return await asyncio.wait_for(self.queue.get(), timeout=0.05)
+                return await asyncio.wait_for(self.queue.get(), timeout=wait_timeout)
             except Exception:
                 return None
 

server/tests/test_transcripts_rtc_ws.py

@@ -115,9 +115,7 @@ def appserver(tmpdir, setup_database, celery_session_app, celery_session_worker)
     settings.DATA_DIR = DATA_DIR
 
 
-@pytest.fixture(scope="session")
+# Using celery_includes from conftest.py which includes both pipelines
-def celery_includes():
-    return ["reflector.pipelines.main_live_pipeline"]
 
 
 @pytest.mark.usefixtures("setup_database")

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