cluster - scan do not respect require_full_coverage at false

[raphaelauv]

Version: 5.1.1

Platform: python 3.11

Description:

when I run a scan ( with scan_iter helper ) on a redis cluster with require_full_coverage at false

and a node is missing then the scan command fail

  File "/home/raphael/REPO/xx/src/redis_clean.py", line 27, in main
    keys_to_delete = [x for x in r_client.scan_iter(match_regex, 100)]
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/raphael/REPO/xx/src/redis_clean.py", line 27, in <listcomp>
    keys_to_delete = [x for x in r_client.scan_iter(match_regex, 100)]
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/raphael/REPO/xx/venv/lib/python3.11/site-packages/redis/commands/cluster.py", line 793, in scan_iter
    cursors, data = self.scan(match=match, count=count, _type=_type, **kwargs)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/raphael/REPO/xx/venv/lib/python3.11/site-packages/redis/commands/core.py", line 3017, in scan
    return self.execute_command("SCAN", *pieces, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/raphael/REPO/xx/venv/lib/python3.11/site-packages/redis/cluster.py", line 1115, in execute_command
    raise e
  File "/home/raphael/REPO/xx/venv/lib/python3.11/site-packages/redis/cluster.py", line 1101, in execute_command
    res[node.name] = self._execute_command(node, *args, **kwargs)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/raphael/REPO/xx/venv/lib/python3.11/site-packages/redis/cluster.py", line 1174, in _execute_command
    raise e
  File "/home/raphael/REPO/xx/venv/lib/python3.11/site-packages/redis/cluster.py", line 1144, in _execute_command
    connection = get_connection(redis_node, *args, **kwargs)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/raphael/REPO/xx/venv/lib/python3.11/site-packages/redis/cluster.py", line 51, in get_connection
    return redis_node.connection or redis_node.connection_pool.get_connection(
                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/raphael/REPO/xx/venv/lib/python3.11/site-packages/redis/connection.py", line 1074, in get_connection
    connection.connect()
  File "/home/raphael/REPO/xx/venv/lib/python3.11/site-packages/redis/connection.py", line 283, in connect
    raise ConnectionError(self._error_message(e))
redis.exceptions.ConnectionError: Error 113 connecting to 172.20.0.4:6379. No route to host.

I would expect the command to run in best effort on available nodes.