StringIndexOutOfBoundsException occurs when setting portal.proxy.path

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.2.X EE, 7.0.0 M3
• Fix Version/s: 6.2.4 CE GA5, 6.2.X EE, 7.0.0 M4
• Component/s: Legacy Components, Legacy Components > Administration UI
• Labels:
  • ee-ts
  • liferay-fixpack-portal-56-6210
• Branch Version/s:
  6.2.x
• Backported to Branch:
  Committed
• Story Points: 11
• Fix Priority: 4
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/23092

Steps:
1. Set 'portal.proxy.path=/portal' in portal-ext.properties
2. Start the portal

Result: During the startup, it throws error:

ERROR [http-bio-8080-exec-1][StripFilter:83] java.lang.StringIndexOutOfBoundsException: String index out of range: -1
java.lang.StringIndexOutOfBoundsException: String index out of range: -1
at java.lang.String.substring(String.java:1875)
at com.liferay.portal.servlet.FriendlyURLServlet.getPathInfo(FriendlyURLServlet.java:183)
at com.liferay.portal.servlet.FriendlyURLServlet.service(FriendlyURLServlet.java:103)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

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Please see attached log file for detailed information.