CORBA24 — GIOP version and CloseConnection

I believe that, at some point, we decided that it is legal to send
request for different GIOP versions over the same connection. Could someone
please confirm or deny? (My memory is a bit hazy on the details.)

At any rate, careful scrutiny of the spec does not reveal any words that would
either state that separate connections must be used for different GIOP versions
or that they can share a single connection. A definite statement is required
either way.

Assuming that different GIOP versions can indeed coexist on the same
connection, we get an interesting problem: for GIOP 1.0 and 1.1, the spec
disallows a client to send a CloseConnection message; for GIOP 1.2, it
requires the client to send a CloseConnection message. This begs the question:
if different GIOP versions can coexist on the same connection, it becomes
impossible to achieve orderly connection shutdown. Sending a CloseConnection
message is illegal for GIOP 1.0 and 1.1, whereas it is required for
GIOP 1.2... So, what's the client to do if multiple GIOP versions are used
over the same connection?

To close with revision