Occasionally, GNOME sessions on your RHEL 7.2 or CentOS 7.2 VDA might fail to start up, and the following error message appears:

"Something has gone wrong."

For the GNOME issue, google the errors reported to find a solution. If the errors reported are similar to those mentioned in Problem Cause, try either of the following solutions:

• Solution1:
  Perform the steps below to remove and reinstall the "Virtualization Host" and "Server with GUI" groups:
  1. Delete the Machine Catalog and the Delivery Group.
  2. Run the klist -li 0x3e4 purge command on the Delivery Controller.
  3. Leave the domain and run the rm -f  krb5.keytab command on the Linux server.
  4. Run the yum groupremove -y "Virtualization Host" "Server with GUI" command.
  5. Run the yum groupinstall -y "Virtualization Host" "Server with GUI" command.
  6. Execute ctxinstall.sh.
  7. Recreate the Machine Catalog and the Delivery Group.
• Solution2:
  Upgrade RHEL 7.2 to RHEL 7.3.

Problem Cause