[Bug 275905] nfs client: mount becomes unresponsive

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From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 24 Dec 2023 14:25:36 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275905

--- Comment #1 from Lexi <lexi.freebsd@le-fay.org> ---
this seems to be connected to Kerberos ticket expiry: the problem recurred just
now when my ticket expired.  when this happens, klist shows:

% klist
Credentials cache: FILE:/tmp/krb5cc_10006
        Principal: lexi@EDEN.LE-FAY.ORG

  Issued                Expires        Principal
Dec 24 04:13:34 2023  >>>Expired<<<  krbtgt/EDEN.LE-FAY.ORG@EDEN.LE-FAY.ORG
Dec 24 06:58:04 2023  >>>Expired<<< 
host/hemlock.eden.le-fay.org@EDEN.LE-FAY.ORG
Dec 24 13:37:42 2023  >>>Expired<<< 
nfs/hemlock.eden.le-fay.org@EDEN.LE-FAY.ORG
Dec 24 13:37:42 2023  >>>Expired<<< 
nfs/hemlock.eden.le-fay.org@EDEN.LE-FAY.ORG
Dec 24 13:37:42 2023  >>>Expired<<< 
nfs/hemlock.eden.le-fay.org@EDEN.LE-FAY.ORG
Dec 24 13:37:42 2023  >>>Expired<<< 
nfs/hemlock.eden.le-fay.org@EDEN.LE-FAY.ORG
[... many identical entries elided...]
Dec 24 13:37:42 2023  >>>Expired<<< 
nfs/hemlock.eden.le-fay.org@EDEN.LE-FAY.ORG
Dec 24 13:37:42 2023  >>>Expired<<< 
nfs/hemlock.eden.le-fay.org@EDEN.LE-FAY.ORG
Dec 24 06:58:04 2023  >>>Expired<<< 
host/hemlock.eden.le-fay.org@EDEN.LE-FAY.ORG
Dec 24 06:58:04 2023  >>>Expired<<< 
host/hemlock.eden.le-fay.org@EDEN.LE-FAY.ORG

in additional, the 'Invalid' counter in nfsstat -cE increases to 64 (it was
previously 0):

Rpc Info:
     TimedOut      Invalid    X Replies      Retries     Requests
            0           64            0            0      4832814

however, the mount never recovers even after renewing the tickets.

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