Hi all ### Background Regarding Key_Shared mode, messages without message-key will default to "NONE_KEY".
### Issue In a topic, if half of the messages contain a message-key and the other half do not. This will result in the consumer who occupies the key-range of "NONE_KEY" consuming more much messages than others. ### What I want to do I want to add a new config to switch the behavior when the message does not contain a message-key: - the policy exists: default the message-key to "NONE_KEY". - the new policy: default the message-key to a random value when the message does not contain a key. Thanks Yubiao Feng
