infrastructure-thread-safety-vllm-v1-engine-fails-to-start-in-triton-inference--104b8f59

THEN In the engine initialization code, wrap signal registration in a condition that checks if the current thread is the main thread. If not, skip signal setup or defer it to a main-thread callback. This ensures compatibility with runtimes that spawn vLLM in a non-main thread.

if threading.current_thread() is threading.main_thread():
    signal.signal(signal.SIGTERM, handle_sigterm)
else:
    logger.warning('Signal handling skipped: not on main thread')