changed thread pool code again

backend/tools/simple_state_checker.py

@@ -134,10 +134,14 @@ logger.info("Got {} capture agents that will be checked...".format(len(agents)))
 # pool = ThreadPool(5)
 # pool.map(check_capture_agent_state, agents)
 
-with ThreadPool(5) as pool:
+NUM_THREADS = 5
-    for agent in agents:
-        pool.apply_async(check_capture_agent_state, agent).get(timeout=10)  # start single threads and enforce timeout
 
+with ThreadPool(NUM_THREADS) as pool:
+    results = [pool.apply_async(check_capture_agent_state, (agent,)) for agent in agents]
+    try:
+        [res.get(timeout=12) for res in results]
+    except TimeoutError:
+        logger.error("Timeout while getting capture agent state!")
 
 pool.close()
 pool.join()