go build, flock, and NFS_BADSEQID

[Rick Macklem]

Try "minorversion=1". The seqid stuff is NFSv4.0 specific and shouldn't
be broken, but NFSv4.1 fixed all this in better ways.

rick

________________________________________
From: alan somers <asomers at gmail.com>
Sent: Monday, March 2, 2020 2:31 PM
To: freebsd-fs
Cc: Rick Macklem
Subject: go build, flock, and NFS_BADSEQID

I'm trying to build a Go project with /usr/home mounted with NFSv4.  The server is running 12.0-RELEASE and the client is running 12.1-RELEASE.  But the build reliably fails because flock(2) returns EACCES.  Dtrace shows the cause is nfsrpc_advlock returning NFS_BADSEQID.  This sounds like an NFS bug (server, client, or both?  I'm not sure).  I'm not an NFS expert.  Is this something I should pursue, and would somebody please give me advise on how to debug further?
-Alan