Deleted Snapshots Still Appear in DF Output
Learn how to resolve an issue where deleted snapshots still appear in DF output with "stale file handle".
Symptom: Previously deleted snapshots still appear in df output
with the message stale file handle.
Cause: When you use an NFSv3 client to perform operations such as
ls, du, or find on the snapshot
directory, the service automatically exports the directory. The client uses
nfs_d_automount() to detect and mount the directory. After the
directory is detected and mounted the first time, the client mounts the directory
automatically.
If you then delete the snapshot, the mount becomes disconnected. The client still holds
an active reference to the snapshot, but can no longer access the snapshot itself, so it
reports stale file handle.
-f flag in the umount command. For
example:sudo umount -f 10.x.x.x:/fs-export-path /mnt/yourmountpoint
If the unmount command fails with the message
device busy, see Cannot Unmount a File System: Device is Busy for a solution to this problem.