Gluster client trying to resolve multiple backupvols in one query

Issue

We are currently getting the following error messages on a couple of our gluster clients:

[2017-11-02 13:07:07.127620] E [name.c:262:af_inet_client_get_remote_sockaddr] 0-glusterfs: DNS resolution failed on host hostx:hosty:hostz

Our mount is mounted using the following in fstab:

hosty:/vol-test /mnt/test glusterfs defaults,acl,backupvolfile-server=hostx:hosty:hostz,_netdev 0 0

DNS resolution is fine and I have tested that all nodes are resolvable against the configured DNS servers.