Comment 23 for bug 1124250

William,

I'm sorry, but I cannot reproduce this issue with the kernels you mentioned.

Are you able to provide me sosreport from the affected system?

You could also try adding -vvv option to your /etc/request-key.d/id_resolver.conf to make it look like this:
create id_resolver * * /usr/sbin/nfsidmap -vvv -t 600 %k %d

and then list the problematic directory. There should be more verbose output either in dmesg output or in the syslog.

Thank you,
Dariusz