[Bug 261291] ESX NFS4.1 client hangs, server never responds to EXCHANGE_ID/CREATE_SESSION

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 18 Jan 2022 02:19:43 UTC

--- Comment #1 from Rick Macklem <rmacklem@FreeBSD.org> ---
Either email me the packet trace as an attachment or put it here
and I'll take a look.
--> Normally ExchangeID/CreateSession should only happen once,
    either when the mount is done or after a server reboot.
    However, the server should reply with an error if, for
    some reason, the client has done it again.

Do you use "trunking"? The ESX client had a serious bug, where
it would try to do a ExchangeID/CreateSession on each TCP connection
being trunked, instead of just on one of them and then sharing
the ClientID and Session between the trunks.
(This bug normally only showed up when the mount was first attempted
 and eventually got resolved once the ClientID and Session was
 acquired successfully for one of the connections. That was for 6.7
 I think?)

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