hazelcast/connection.py", line 259, in __init__ AttributeError: 'NoneType' object has no attribute 'host'

[Danny-Hazelcast]

under split brain / member disconnection conditions the client throws AttributeError

File "/home/ec2-user/hz-root/hz-py-lib/hzPyClient/MapGet.py", line 12, in timeStep
    val = self.map.get(k)
  File "/usr/local/lib/python2.7/site-packages/hazelcast/future.py", line 271, in f
    result = inner(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/hazelcast/proxy/map.py", line 341, in get
    return self._get_internal(key_data)
  File "/usr/local/lib/python2.7/site-packages/hazelcast/proxy/map.py", line 816, in _get_internal
    return self._encode_invoke_on_key(map_get_codec, key_data, key=key_data, thread_id=thread_id())
  File "/usr/local/lib/python2.7/site-packages/hazelcast/proxy/base.py", line 62, in _encode_invoke_on_key
    return self._encode_invoke_on_partition(codec, partition_id, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/hazelcast/proxy/base.py", line 66, in _encode_invoke_on_partition
    return self._client.invoker.invoke_on_partition(request, _partition_id).continue_with(response_handler, codec,
  File "/usr/local/lib/python2.7/site-packages/hazelcast/invocation.py", line 138, in invoke_on_partition
    return self.invoke(Invocation(message, partition_id=partition_id))
  File "/usr/local/lib/python2.7/site-packages/hazelcast/invocation.py", line 151, in invoke_smart
    self._send_to_address(invocation, addr)
  File "/usr/local/lib/python2.7/site-packages/hazelcast/invocation.py", line 194, in _send_to_address
    self._client.connection_manager.get_or_connect(address).continue_with(self.on_connect, invocation, ignore_heartbeat)
  File "/usr/local/lib/python2.7/site-packages/hazelcast/connection.py", line 110, in get_or_connect
    message_callback=self._client.invoker._handle_client_message)
  File "/usr/local/lib/python2.7/site-packages/hazelcast/reactor.py", line 91, in new_connection
    message_callback)
  File "/usr/local/lib/python2.7/site-packages/hazelcast/reactor.py", line 114, in __init__
    Connection.__init__(self, address, connection_closed_callback, message_callback)
  File "/usr/local/lib/python2.7/site-packages/hazelcast/connection.py", line 259, in __init__
    self._address = (address.host, address.port)
AttributeError: 'NoneType' object has no attribute 'host'

[Danny-Hazelcast]

this issue randomly occurs, only when members are disconnected / reconnected during network split

[gcmcnutt]

We're definitely hitting these, even on relatively stable configurations.

In our case we've even seen it with a single hazelcast instance (in a container on K8s). And while there may be some network reconfigurations while the long duration workload is under test, other services (e.g. kafka) aren't complaining.

Any idea if this is version related? Or if there are any potential workarounds?