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Subject: RE: [ws-rx] NEW ISSUE: anonymous AcksTo

Title: Message
w.r.t. your intermediary examining the wsa:ReplyTo - be a bit careful here. 
> The presence of a wsa:ReplyTo does not imply anything about the MEP (sadly :-(. 
> There are cases where a wsa:ReplyTo could be present even for a one-way 
> message.  And the presence of an anonymous wsa:ReplyTo does not guarantee 
> that anything will flow back on the http response flow.   

Let me try to clarify myself.  What's important here is not the fact I examine wsa:ReplyTo to figure out what MEP this is.  Let's say there is an intermediary that is aware that the MEP is one way (perhaps through the WSDL, etc).  And this intermediary is not WS-RX aware.  So it decides to send back a 202 and close the http connection before forwarding on the message.  This will cause the WS-RX protocol to fail since no synchronous ack can be sent back.  Thus, the introduction of an anonymous AcksTo is now a backwards-incompatible change.  In order for things to work, all intermediaries will need to be WS-RX aware and keep connections open in case synchronous acks need to be sent back.

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