I am having a problem with how LibreOffice handles editing files over a network connection. The remote computer is either Fedora 23 or CentOS 7.1 server mounted remotely via NFS (also tested with SSH with sshfs), the client computer is either Fedora 23 or CentOS 7.1.

LibreOffice 5.0.4.2

When the network goes down while editing a file in LibreOffice, LibreOffice on the local computer locks up. In fact, sometimes the only way to recover is to hard reboot the local computer.

I've compiled the simplest test case I could to demonstrate. You will need 2 computers, one to act as an NFS server, and one to act as a client.

I've tried this on various versions and combinations of Fedora and CentOS, all with the same result.

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On the server (as root user): 
dnf install system-config-nfs nfs-utils
vi /etc/exports   
   add "/home/WHOMEVER 192.168.10.0/24(rw,sync)"
exportfs -a
(you may need to allow access to nfs on your firewall, I used "sudo firewall-config")
service rpcbind start
service nfs-server start

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On the client laptop (as WHOMEVER user): 
mkdir nfstest
sudo mount -t nfs SERVER:/home/WHOMEVER nfstest/

Now start LibreOffice on the client laptop, and open a document (or create and save) using this "nfstest" remote NFS directory.

Now, simply turn off wifi on the laptop (or enter airplane mode). LibreOffice will be locked up hard, and often the entire laptop will be locked up and require a hard reboot to recover.