Getting 400 page not found error instead of /c/portal/status(status.jsp)

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.0 Alpha 1
• Fix Version/s: 6.1.X EE, 6.2.4 CE GA5, 6.2.X EE, 7.0.0 Alpha 1
• Component/s: Accessibility, Portal Configuration, Portal Configuration > Portal Settings
• Labels:
  • liferay-fixpack-portal-74-6210
  • liferay-fixpack-portal-93-6210
• Branch Version/s:
  6.2.x, 6.1.x
• Backported to Branch:
  Committed
• Story Points: 18
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/29778

IMPORTANT NOTE: Behavior fixed in this issue will be changed after LPS-63997 (for Combo servlet only).

This issue exists in all liferay versions(6.2 and before) including CE & EE editions.
Steps to reproduce:

1. Go to any public facing liferay sites(http://www.sesamestreet.org/)
(https://www.bcbsal.org/)
2. Take any <servlet-mapping> -> <url-pattern> values from web.xml (from ROOT folder ->WEB-INF/web.xml) for example: /combo/*
3. add this to the public domain. www.sesamestreet.org/combo/ and access the page
4. Will get http 404 error. It suppose to redirect to /c/portal/status to display error page.
5. Can be reproducible in local in environment too. Just access localhost:8080/combo/

Issue: in VirtualHostFilter.java
After this condition:
if (!friendlyURL.equals(StringPool.SLASH) &&
!isValidFriendlyURL(friendlyURL)) {
_log.debug("Friendly URL is not valid");
After URL is determined not as valid URL, the user should be redirected
to the /c/portal/status, instead it continuing with filter chain processing.

If site was access with hostname/combo1/ hostname/combo (without forward slash at end), liferay is redirecting to the /c/portal/status (status.jsp) error page.