For any configuration related issue you can first refer to either one of the logs:
/var/opt/novell/log/zenworks/loader-messages.log
/var/opt/novell/log/zenworks/zman.log
%ZENWORKS_HOME%\logs\loader-messages.log
%ZENWORKS_HOME%\logs\zman.log
However, if information in these logs is insufficient, then it is recommended that you enable the ZooKeeper logs by uncommenting the lines below the comment #zookeeper in the log4j.properties file present in /opt/novell/zenworks/share/tomcat and then restarting the ZENworks server. You can then view the zookeeper-messages.log in the path /var/opt/novell/log/zenworks/.
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.