Cinder NFS mount fails

Issue

2018-05-30 11:01:57.722 397278 ERROR cinder.volume.drivers.nfs [req-9d960816-a3fa-4b26-892a-ef76ca6607b1 - - - - -] Mount failure for 10.111.168.190:/export/cinder after 3 attempts.
2018-05-30 11:01:57.724 397278 ERROR cinder.volume.drivers.remotefs [req-9d960816-a3fa-4b26-892a-ef76ca6607b1 - - - - -] Exception during mounting NFS mount failed for share 10.111.168.190:/export/cinder. Error - {'pnfs': u"Unexpected error while running command.\nCommand: sudo cinder-rootwrap /etc/cinder/rootwrap.conf mount -t nfs -o rw,sync,vers=4,minorversion=1 10.111.168.190:/export/cinder /var/lib/cinder/mnt/37792ee7d9ee652652c28d41fd3b9b64\nExit code: 32\nStdout: u''\nStderr: u'mount.nfs: /var/lib/cinder/mnt/37792ee7d9ee652652c28d41fd3b9b64 is busy or already mounted\\n'", 'nfs': u"Unexpected error while running command.\nCommand: sudo cinder-rootwrap /etc/cinder/rootwrap.conf mount -t nfs -o rw,sync 10.111.168.190:/export/cinder /var/lib/cinder/mnt/37792ee7d9ee652652c28d41fd3b9b64\nExit code: 32\nStdout: u''\nStderr: u'mount.nfs: /var/lib/cinder/mnt/37792ee7d9ee652652c28d41fd3b9b64 is busy or already mounted\\n'"}
2018-05-30 11:01:57.725 397278 ERROR cinder.volume.manager [req-9d960816-a3fa-4b26-892a-ef76ca6607b1 - - - - -] Failed to initialize driver.
2018-05-30 11:01:57.725 397278 ERROR cinder.volume.manager Traceback (most recent call last):
2018-05-30 11:01:57.725 397278 ERROR cinder.volume.manager   File "/usr/lib/python2.7/site-packages/cinder/volume/manager.py", line 422, in init_host
2018-05-30 11:01:57.725 397278 ERROR cinder.volume.manager     self.driver.do_setup(ctxt)
2018-05-30 11:01:57.725 397278 ERROR cinder.volume.manager   File "/usr/lib/python2.7/site-packages/cinder/volume/drivers/nfs.py", line 158, in do_setup
2018-05-30 11:01:57.725 397278 ERROR cinder.volume.manager     self.set_nas_security_options(self._is_voldb_empty_at_startup)
2018-05-30 11:01:57.725 397278 ERROR cinder.volume.manager   File "/usr/lib/python2.7/site-packages/cinder/volume/drivers/nfs.py", line 356, in set_nas_security_options
2018-05-30 11:01:57.725 397278 ERROR cinder.volume.manager     raise exception.NfsNoSharesMounted()
2018-05-30 11:01:57.725 397278 ERROR cinder.volume.manager NfsNoSharesMounted: No mounted NFS shares found
2018-05-30 11:01:57.725 397278 ERROR cinder.volume.manager

/var/log/messages 
May 30 12:28:12 bobcat-controller-1 kernel: SELinux: mount invalid.  Same superblock, different security settings for (dev 0:43, type nfs4)
May 30 12:28:12 bobcat-controller-1 kernel: SELinux: mount invalid.  Same superblock, different security settings for (dev 0:43, type nfs4)
May 30 12:28:13 bobcat-controller-1 kernel: SELinux: mount invalid.  Same superblock, different security settings for (dev 0:43, type nfs4)
May 30 12:28:14 bobcat-controller-1 kernel: SELinux: mount invalid.  Same superblock, different security settings for (dev 0:43, type nfs4)
May 30 12:28:15 bobcat-controller-1 kernel: SELinux: mount invalid.  Same superblock, different security settings for (dev 0:43, type nfs4)
May 30 12:28:16 bobcat-controller-1 kernel: SELinux: mount invalid.  Same superblock, different security settings for (dev 0:43, type nfs4)