[NFS-Ganesha-Devel] VFS fsal and ESTALE

I have an export (vfs fsal, the underlying fs is ext4) and initially things work ok, when I do basic create/r/w files. If I leave it for 20-30mins and do ls on the existing file it failes with stale file handle. I am using defaults for config, tried full logging for components but still no idea why it finds the fh is bad.