[GSS](7.3.z) UNDERTOW-1873 - JSP file does not recompile when forwarding a request path is not canonicalized in exploded deployment

You can workaround this issue by using the following servlet filter that can utilize Undertow's CanonicalPathUtils API to canonicalize a forward path. import java.io.IOException; import java.util.logging.Logger; import java.util.logging.Level; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.RequestDispatcher; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.annotation.WebFilter; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletRequestWrapper; import javax.servlet.http.HttpServletResponse; import io.undertow.util.CanonicalPathUtils; @WebFilter( "/*" ) public class ExampleServletFilter implements Filter { private static final Logger log = Logger.getLogger(ExampleServletFilter. class. getName()); protected FilterConfig filterConfig = null ; public void destroy() { this .filterConfig = null ; } public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { if (!(request instanceof HttpServletRequest)) { chain.doFilter(request, response); return ; } HttpServletRequest httpRequest = (HttpServletRequest) request; HttpServletRequestWrapper wrappedRequest = new HttpServletRequestWrapper(httpRequest) { @Override public RequestDispatcher getRequestDispatcher( final String path) { final String canonicalPath = CanonicalPathUtils.canonicalize(path); // log.info( "specified path = " + path + " -> canonicalized path = " + canonicalPath); return httpRequest.getRequestDispatcher(canonicalPath); } }; chain.doFilter(wrappedRequest, response); } public void init(FilterConfig filterConfig) throws ServletException { } }

Normal Servlet/JSP reproducer (example.war.zip) 1. Extract example.war.zip 2. Deploy example.war as an unmanaged deployment deploy /path/to/example.war --unmanaged (or put example.war under your $JBOSS_HOME/standalone/deployments/ and create an empty example.war.dodeploy) 3. Send a request curl -v http: //localhost:8080/example/index.jsp 4. Update /path/to/example.war/test/example.jsp 5. Send a new request curl -v http: //localhost:8080/example/index.jsp The update is not reflected as recompile is not triggered. — Spring Boot based reproducer (sb-app-reproducer.zip) 1. Extract sb-app-reproducer.zip 2. Deploy demo.war as an unmanaged deployment deploy /path/to/demo.war --unmanaged (or put demo.war under your $JBOSS_HOME/standalone/deployments/ and create an empty demo.war.dodeploy) 3. Send a request curl -v http: //localhost:8080/demo/test2 4. Update /path/to/demo.war/WEB-INF/jsp/test/example.jsp 5. Send a new request curl -v http: //localhost:8080/demo/test2 The update is not reflected as recompile is not triggered.