For any configuration related issue you can first refer to either one of the logs:
/var/opt/microfocus/log/zenworks/loader-messages.log
/var/opt/microfocus/log/zenworks/zman.log
%ZENSERVER_HOME%\logs\loader-messages.log
%ZENSERVER_HOME%\logs\zman.log
If at any point in time, the ZooKeeper cluster is down, then check whether the port 6789 of the ZooKeeper server is not being used by any other component.