diff --git a/replit_river/client_session.py b/replit_river/client_session.py
index b668035..b76252d 100644
--- a/replit_river/client_session.py
+++ b/replit_river/client_session.py
@@ -84,7 +84,7 @@ async def send_upload(
         """
 
         stream_id = nanoid.generate()
-        output: Channel[Any] = Channel(1024)
+        output: Channel[Any] = Channel(1)
         self._streams[stream_id] = output
         first_message = True
         try:
@@ -98,7 +98,8 @@ async def send_upload(
                     payload=init_serializer(init),
                 )
                 first_message = False
-
+            # If this request is not closed and the session is killed, we should
+            # throws exception here
             async for item in request:
                 control_flags = 0
                 if first_message:
diff --git a/replit_river/session.py b/replit_river/session.py
index 92fc206..37578aa 100644
--- a/replit_river/session.py
+++ b/replit_river/session.py
@@ -514,6 +514,7 @@ async def close(self, is_unexpected_close: bool) -> None:
             await self._task_manager.cancel_all_tasks()
             # TODO: unexpected_close should close stream differently here to
             # throw exception correctly.
+            logging.error(f"##### closing all streams here : {self._streams.values()}")
             for stream in self._streams.values():
                 stream.close()
             async with self._stream_lock: