Base Tomcat URL no longer redirects to Web Viewer 12.1 login page

Products

• Output Management Web Viewer

Issue/Introduction

Using Tomcat 8.5.4, the version supplied with the initial Web Viewer 12.1 install,  the base Tomcat URL http://localhost:8080 will redirect to http://localhost:8080/CAOMWebViewer12/index.jsp.
However, after upgrading to 9.0.80 with PTF LU11651 that redirect does not work and the base Tomcat URL http://localhost:8080 loads a Tomcat Welcome page.

Environment

Web Viewer 12.1

Cause

WV_redirect_install.html was in apache-tomcat-8.5.4\webapps\ROOT but not in apache-tomcat-9.0.80\webapps\ROOT

Resolution

It is possible to redirect the Tomcat default application ROOT to another application.
After comparing the 2 Web Viewer directories apache-tomcat-8.5.4\webapps\ROOT and apache-tomcat-9.0.80\webapps\ROOT, the 8.5.4 directory had an extra file WV_redirect_install.html.
After copying WV_redirect_install.html to the 9.0.80 directory apache-tomcat-9.0.80\webapps\ROOT the URL http://localhost:8080 redirected to http://localhost:8080/CAOMWebViewer12/index.jsp. 
No restart of Tomcat was required but a refresh of the browser cache/restart of the browser may be needed to see the change.

Additional Information

After further investigation, it was found that some Web Viewer 12.1 Tomcat updates like 9.0.80 do not contain the file WV_redirect_install.html. 
This problem was resolved with the publication of LU13450 New Tomcat (9.0.87) for use with Web Viewer 12.1.