My NFS infrastructure has servers running current RHEL7.2 (mostly kernel 3.10.0-327.4.5.el7 with a one-line patch needed to fix a soft lockup in nfs4_laundromat) and clients running current Fedora 23 (4.3.5-300.fc23.x86_64). Everything is mounted NFS4.1 with sec=krb5p. Occasionally a client will get into a state where it just hammers the server with network traffic, sometimes at full line rate, with: NFS: nfs4_reclaim_open_state: Lock reclaim failed! spewed to the log about 500 times a second. The load goes up quite a bit (to 5-7 or so). The machine isn't doing anything and there isn't even a user logged in. However, there are always a few user processes hanging around, usually kwin_x11 for whatever reason. (My guess is because of a lock on ~/.Xauthority.) When I kill those user processes, this is logged once: NFS: nfs4_reclaim_open_state: unhandled error -10068 -10068 is NFS4ERR_RETRY_UNCACHED_REP. Unfortunately I did not grab any of that traffic (I just wanted it to stop). This happens to me periodically so I'll be sure to do that when it hits again. One theory is that this is related to a user's kerberos ticket expiring. I see some hits when I search for the line that's spewed, but they're either not recent or or weren't reproducible. I don't find any hits for that specific unhandled error. - J< -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
