I've run into a problem which produces the same behavior as bug #934160, but attributed it elsewhere due to other observations.
What are the version(s) of the Linux kernel being used on your server and clients? I've confirmed using a 4.9 kernel on a client instead of a 4.19 kernel also works around this issue. In fact one client using a kernel from 4.19.98+1+deb10u1 source doesn't display the issue, but one using 4.19.118+2 source does. This timeframe though doesn't match when you reported the issue. Could be there are several things working together to cause this. I haven't yet tried tried using NFS version 4.1, instead of 4.2. -- (\___(\___(\______ --=> 8-) EHM <=-- ______/)___/)___/) \BS ( | ehem+sig...@m5p.com PGP 87145445 | ) / \_CS\ | _____ -O #include <stddisclaimer.h> O- _____ | / _/ 8A19\___\_|_/58D2 7E3D DDF4 7BA6 <-PGP-> 41D1 B375 37D0 8714\_|_/___/5445
