This one is a bit weird.
We have a closed network of about five (5) Red Hat Workstation 7 assets in one of our development laboratories. One of the REHL 7 machines is hosting a USB connected DroboPro via NFS to the other machines - the other machines are mounting this share on boot via /etc/fstab. Everything works great and all users and access the share - unless the machine hosting the NFS share goes down. When that machine is shut down or brought offline, the share is inaccessible (obviously), but the other machines also experience a side effect we can't explain.
If the machine hosting the share is off, and we lock the screen or reboot any of the other four (4) RHEL 7 machines, they lockup/freeze and are inaccessible until the machine hosting the NFS share is brought back online.
We've narrowed the source down to the NFS share by unmounting it on the other four (4) RHEL 7 assets and bringing down the share, which resulted in no locking/freezing.
/etc/exports > /dir/path/ 192.168.100.0/24(rw)
Any insight or recommendation for further troubleshooting would be appreciated.