Description of problem: Hang may be caused by client not removing file cache capability from wanted set after dropping its cache for a given file. How reproducible: Not easily reproducible. Marking this as CodeChange.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2018:2375