diff --git a/miles/utils/arguments.py b/miles/utils/arguments.py
index a88e2760f6..0eba2a6767 100644
--- a/miles/utils/arguments.py
+++ b/miles/utils/arguments.py
@@ -667,6 +667,12 @@ def add_data_arguments(parser):
                 default=None,
                 help="Number of rollout steps. If not set, we will calculate the number of rollout steps from the dataset size.",
             )
+            parser.add_argument(
+                "--debug-exit-after-rollout",
+                type=int,
+                default=None,
+                help="Exit training after this many rollouts (for testing checkpoint resume with consistent scheduler params).",
+            )
             parser.add_argument(
                 "--num-epoch",
                 type=int,
diff --git a/train.py b/train.py
index bd83f51f5a..e319d918ef 100644
--- a/train.py
+++ b/train.py
@@ -1,4 +1,5 @@
 import asyncio
+import logging
 
 from sglang.srt.constants import GPU_MEMORY_TYPE_CUDA_GRAPH, GPU_MEMORY_TYPE_KV_CACHE, GPU_MEMORY_TYPE_WEIGHTS
 
@@ -12,6 +13,8 @@
 from miles.utils.process_identity import MainProcessIdentity
 from miles.utils.tracking_utils import finish_tracking, init_tracking
 
+logger = logging.getLogger(__name__)
+
 
 async def train(args):
     configure_logger(args, source=MainProcessIdentity())
@@ -113,6 +116,17 @@ async def save(rollout_id):
         if should_run_periodic_action(rollout_id, args.eval_interval, num_rollout_per_epoch):
             await rollout_manager.eval.remote(rollout_id)
 
+        if (
+            args.debug_exit_after_rollout is not None
+            and (rollout_id - args.start_rollout_id + 1) >= args.debug_exit_after_rollout
+        ):
+            logger.info(
+                "debug_exit_after_rollout=%d reached at rollout_id=%d, exiting",
+                args.debug_exit_after_rollout,
+                rollout_id,
+            )
+            break
+
     await rollout_manager.dispose.remote()
 
 
diff --git a/train_async.py b/train_async.py
index a255327b4a..7e60518b81 100644
--- a/train_async.py
+++ b/train_async.py
@@ -1,4 +1,5 @@
 import asyncio
+import logging
 
 from miles.ray.placement_group import create_placement_groups, create_rollout_manager, create_training_models
 from miles.utils.arguments import parse_args
@@ -10,6 +11,8 @@
 from miles.utils.process_identity import MainProcessIdentity
 from miles.utils.tracking_utils import finish_tracking, init_tracking
 
+logger = logging.getLogger(__name__)
+
 
 # The framework supports other asynchronous approaches such as fully async (which is shown in examples/full_async).
 async def train(args):
@@ -85,6 +88,17 @@ async def train(args):
         if should_run_periodic_action(rollout_id, args.eval_interval, num_rollout_per_epoch):
             await rollout_manager.eval.remote(rollout_id)
 
+        if (
+            args.debug_exit_after_rollout is not None
+            and (rollout_id - args.start_rollout_id + 1) >= args.debug_exit_after_rollout
+        ):
+            logger.info(
+                "debug_exit_after_rollout=%d reached at rollout_id=%d, exiting",
+                args.debug_exit_after_rollout,
+                rollout_id,
+            )
+            break
+
     await rollout_manager.dispose.remote()