From f9d2199a0489062b7322b8a91c02d6d66be13352 Mon Sep 17 00:00:00 2001 From: Khaleel Al-Adhami Date: Mon, 20 Apr 2026 12:14:42 -0700 Subject: [PATCH] make sure running prod backend only uses backend port --- reflex/reflex.py | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) diff --git a/reflex/reflex.py b/reflex/reflex.py index fd812c15d27..bf8a66afecd 100644 --- a/reflex/reflex.py +++ b/reflex/reflex.py @@ -338,14 +338,25 @@ def _run( _run_dev(running_mode, frontend_port, backend_port, backend_host) else: - port = ( - frontend_port or backend_port or config.frontend_port or config.backend_port - ) + if running_mode == constants.RunningMode.BACKEND_ONLY: + requested_port = backend_port or config.backend_port + fallback_port = constants.DefaultPorts.BACKEND_PORT + elif running_mode == constants.RunningMode.FRONTEND_ONLY: + requested_port = frontend_port or config.frontend_port + fallback_port = constants.DefaultPorts.FRONTEND_PORT + else: + requested_port = ( + frontend_port + or backend_port + or config.frontend_port + or config.backend_port + ) + fallback_port = constants.DefaultPorts.FRONTEND_PORT port = processes.handle_port( service_name=running_mode.name.lower(), - port=(port or constants.DefaultPorts.FRONTEND_PORT), - auto_increment=port is None, + port=requested_port or fallback_port, + auto_increment=requested_port is None, ) _run_prod(running_mode, port, backend_host)