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

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 27 Jan 2022 15:51:20 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261291

--- Comment #7 from Alan Somers <asomers@FreeBSD.org> ---
So rolling back didn't work.  I wasn't able to boot for some reason, perhaps
because I had upgraded my zpools.  And I didn't have enough time to debug it.

I was able to reproduce the issue.  tcpdump again showed a stream of ECHANGE
ID/CREATE SESSION messages, netstat did not show any hosts with a RECV-Q stuck
above zero, and procstat did not show any nfsd threads blocked.  Do you have
any other ideas?

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