[FIX] fix launch error without training scripts in LLM_SERVER_ONLY mode (#425)

* [FIX] fix launch error without training scripts in LLM_SERVER_ONLY mode

Author: fishcrap

areal/launcher/local.py

@@ -312,7 +312,7 @@ def local_main(config, run_id: int = 0):
         seed_arg = spec["seed_arg"]
         module = spec["module"]
         server_cmd = (
-            f"python3 -m {module} {' '.join(sys.argv[2:])} {seed_arg}={base_seed}"
+            f"python3 -m {module} {' '.join(sys.argv[1:])} {seed_arg}={base_seed}"
         )
 
         # Launch inference servers.

areal/launcher/ray.py

@@ -379,7 +379,7 @@ def ray_main(config, run_id: int = 0):
         base_seed = config.sglang.random_seed
         sglang_args_list = [
             [
-                sys.argv[2:]
+                sys.argv[1:]
                 + [f"sglang.random_seed={base_seed + i * n_servers_per_node}"]
             ]
             for i in range(n_sglang_nodes)
@@ -459,7 +459,7 @@ def sglang_env_hook(
 
         base_seed = config.vllm.seed
         vllm_args_list = [
-            [sys.argv[2:] + [f"vllm.seed={base_seed + i}"]]
+            [sys.argv[1:] + [f"vllm.seed={base_seed + i}"]]
             for i in range(n_vllm_servers)
         ]
         vllm_entry_point = str(

areal/launcher/slurm.py

@@ -488,7 +488,7 @@ def _build_llm_server_plan(backend: str, spec: Dict):
             seed_arg = spec["seed_arg"]
             module = spec["module"]
             backend_server_cmd_template = (
-                f"python3 -m {module} {' '.join(sys.argv[2:])} {seed_arg}={{seed}}"
+                f"python3 -m {module} {' '.join(sys.argv[1:])} {seed_arg}={{seed}}"
             )
 
             backend_cmds = []