I am runnning a Spring Boot 2.7.0 (Latest) Tomcat embedded WAR + Spring 
Security + Struts 6.0.0 Actions + JSP pages.  I started noticing a loop when a 
Struts2 Action result type is a "dispatcher" with following repetive stack 
trace.  Then, a stack overflow is raised.

...... repeated several times ......
        at 
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:637) 
~[struts2-core-6.0.0.jar:6.0.0]
        at 
org.apache.struts2.dispatcher.ExecuteOperations.executeAction(ExecuteOperations.java:79)
 ~[struts2-core-6.0.0.jar:6.0.0]
        at 
org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:140)
 ~[struts2-core-6.0.0.jar:6.0.0]
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:111)
 ~[spring-web-5.3.20.jar:5.3.20]
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:111)
 ~[spring-web-5.3.20.jar:5.3.20]
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:111)
 ~[spring-web-5.3.20.jar:5.3.20]
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:711)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:459)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:385)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:313)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.springframework.security.web.header.HeaderWriterFilter$HeaderWriterRequestDispatcher.forward(HeaderWriterFilter.java:170)
 ~[spring-security-web-5.7.1.jar:5.7.1]
        at 
org.apache.struts2.result.ServletDispatcherResult.doExecute(ServletDispatcherResult.java:169)
 ~[struts2-core-6.0.0.jar:6.0.0]
        at 
org.apache.struts2.result.StrutsResultSupport.execute(StrutsResultSupport.java:206)
 ~[struts2-core-6.0.0.jar:6.0.0]
        at 
com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:363)
 ~[struts2-core-6.0.0.jar:6.0.0]
        at 
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:280)
 ~[struts2-core-6.0.0.jar:6.0.0]
        at 
org.apache.struts2.factory.StrutsActionProxy.execute(StrutsActionProxy.java:48) 
~[struts2-core-6.0.0.jar:6.0.0]
        at 
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:637) 
~[struts2-core-6.0.0.jar:6.0.0]
        at 
org.apache.struts2.dispatcher.ExecuteOperations.executeAction(ExecuteOperations.java:79)
 ~[struts2-core-6.0.0.jar:6.0.0]
        at 
org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:140)
 ~[struts2-core-6.0.0.jar:6.0.0]
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:111)
 ~[spring-web-5.3.20.jar:5.3.20]
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:111)
 ~[spring-web-5.3.20.jar:5.3.20]
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:111)
 ~[spring-web-5.3.20.jar:5.3.20]
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:711)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:459)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:385)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:313)
 ~[tomcat-embed-core-9.0.63.jar:9.0.63]
        at 
org.springframework.security.web.header.HeaderWriterFilter$HeaderWriterRequestDispatcher.forward(HeaderWriterFilter.java:170)
 ~[spring-security-web-5.7.1.jar:5.7.1]
        at 
org.apache.struts2.result.ServletDispatcherResult.doExecute(ServletDispatcherResult.java:169)
 ~[struts2-core-6.0.0.jar:6.0.0]
        at 
org.apache.struts2.result.StrutsResultSupport.execute(StrutsResultSupport.java:206)
 ~[struts2-core-6.0.0.jar:6.0.0]
        at 
com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:363)
 ~[struts2-core-6.0.0.jar:6.0.0]
        at 
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:280)
 ~[struts2-core-6.0.0.jar:6.0.0]
        at 
org.apache.struts2.factory.StrutsActionProxy.execute(StrutsActionProxy.java:48) 
~[struts2-core-6.0.0.jar:6.0.0]
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