Re: [RFC PATCH v4 14/26] Add stateless RPC options to upload-pack, receive-pack

Junio C Hamano [off-list ref] wrote:

I think that is probably too much complexity for too little gain.  I think
detecting stale request and having requestor retry would be sufficient,
and validating the want lines as we already do would give the same level
of assurance as "check against the hash of first phase response" I
outlined above, and would be much simpler thus more robust.

Ack.

I think what we want here is to just add an "ERR invalid want"
message just before disconnecting when the client gives us a SHA-1
which we don't point to directly.  Client implementations can choose
how to handle this error.  They could retry from the beginning,
or they could abort.

-- 
Shawn.