Does Ray CPP Api have a dependency on Redis

I am trying to run the ray-cpp example( following the quick start ⁠here), however running into some gcs issues.

Local node IP:
Traceback (most recent call last):
  File "/usr/local/bin/ray", line 8, in <module>
  File "/usr/local/lib/python3.7/dist-packages/ray/scripts/", line 2498, in main
    return cli()
  File "/usr/local/lib/python3.7/dist-packages/click/", line 1157, in __call__
    return self.main(*args, **kwargs)
  File "/usr/local/lib/python3.7/dist-packages/click/", line 1078, in main
    rv = self.invoke(ctx)
  File "/usr/local/lib/python3.7/dist-packages/click/", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/local/lib/python3.7/dist-packages/click/", line 1434, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/local/lib/python3.7/dist-packages/click/", line 783, in invoke
    return __callback(*args, **kwargs)
  File "/usr/local/lib/python3.7/dist-packages/ray/autoscaler/_private/", line 856, in wrapper
    return f(*args, **kwargs)
  File "/usr/local/lib/python3.7/dist-packages/ray/scripts/", line 772, in start
    ray_params, head=True, shutdown_at_exit=block, spawn_reaper=block
  File "/usr/local/lib/python3.7/dist-packages/ray/_private/", line 307, in __init__
  File "/usr/local/lib/python3.7/dist-packages/ray/_private/", line 1404, in start_head_processes
    assert self.get_gcs_client() is not None
  File "/usr/local/lib/python3.7/dist-packages/ray/_private/", line 676, in get_gcs_client
  File "/usr/local/lib/python3.7/dist-packages/ray/_private/", line 722, in _init_gcs_client
    f"Failed to {'start' if self.head else 'connect to'} GCS. "
RuntimeError: Failed to start GCS.  Last 1 lines of error files:
[2024-06-11 20:51:01,530 C 1013665 1013665] (gcs_server)  Check failed: server_ Failed to start the grpc server. The specified port is 6379. This means that Ray's core components will not be able to function correctly. If the server startup error message is `Address already in use`, it indicates the server fails to start because the port is already used by other processes (such as --node-manager-port, --object-manager-port, --gcs-server-port, and ports between --min-worker-port, --max-worker-port). Try running sudo lsof -i :6379 to check if there are other processes listening to the port.```

I thought redis was no longer needed with ray however i see that the cpp api is still dependent on it