judging by Mone's post which I found here:
the message
< WARN> Unexpected update for item xyz
is displayed when Lightstreamer is provided with an update for an item which has not been subscribed to.
Given the fact, that "subscribtion" in this case means "presence of a client", I assume that this warning will be generated each time there is no actual client trying to get that particular xyz item. Now, two quick questions:
1. do I understand this subscription mechanism correctly?
2. if the answer to question 1. is "yes" then why would a lack of clients be reported as a WARN? After all, it's possible that no one is currently visiting my site (I use HTML clients along with java adapters), which is perefctly ok. Why would I need to be warned about that?