Problem

After running the SackState setup.sh script, StackState fails to start with the following error:

Failed to execute operation: Too many levels of symbolic links

Cause

The setup.sh  script has modified the systemd unit files for stackgraph.service  and stackstate.service. When changes have been made to a systemd unit file, the systemd manager configuration must be reloaded and symlinks to the affected services recreated.

Solution

Run the commands below to remove existing symlinks, reload the systemd manager configuration and recreate symlinks to the stackgraph and stackstate services.  

systemctl disable /usr/lib/systemd/system/stackgraph.service
systemctl disable /usr/lib/systemd/system/stackstate.service
systemctl daemon-reload
systemctl enable stackgraph.service
systemctl enable stackstate.service