We have a command-based adapter set up with a client subscribing to a list of specific keys. From the server side, we need to be able to tell the client when a key is no longer valid and can/should be removed. We've attempted to accomplish this by having the server send a DELETE command with the key that the client(s) should disregard. The command is making it through the adapter fine, but the L.preprocessor is logging the message in the title as a warning and, not surprisingly, the event is not propagated to the client.

The question is... under what conditions would a DELETE event for a key be "expected" and passed on? We have verified that the key is actually subscribed by successfully performing an update against the same key.