Use of tab instead of spaces in the web.xml file when adding the new line for the GdEventServlet.
Review the CA Spectrum Connector for CA Service Operations Insight installation log (CA-Spectrum_Connector_InstallDebug.log) in the %TEMP% folder.
The following relevant entries are in the %TEMP%/CA-Spectrum_Connector_InstallDebug.log file:
Check HTTP connection for ocUrl=http://<OneClick hostname>:<port>/spectrum/restful/landscapes
java.io.IOException: Server returned HTTP response code: 500 for URL: http://<OneClick hostname>:<port>/spectrum/restful/landscapes
If you try to open the following URL you will get the same kind of error: "HTTP Status 500 - No Response class com.ca.spectrum.restful.servlet.EventServlet"
When you open the $SPECROOT/tomcat/webapps/spectrum/WEB-INF/web.xml file in WordPad, you notice the column is not aligned for the GdEventServlet entry.