If you have big XFS filesystem (with lot of files) and you use inode64 mount option, exporting this file system using NFS may fail when mouting this export on client:

Stale NFS file handle

This error is strange and confusing. Workaround is to specify fsid in /etc/exports for this filesystem.

For more information check this nice blog article https://hpc.uni.lu/blog/2014/xfs-and-inode64/