It's not clear to me that file delegation works when there are either: a) A server local process accessing a file which has been delegated to a client or b) 2 clients accessing 2 NFS servers using GFS each request delegation
Marking for 5.2, though I suspect any required changes will likely move out to 5.3
5.2 kernel code cut-off date is only 2 weeks away from now. There is no way for GFS1/2 to make it. The lease is currently turned off in GFS1/2.
*** This bug has been marked as a duplicate of 264721 ***