Hello, I am in the process of migrating from Tomcat 9 (9.0.87) to Tomcat 10.1 (10.1.20).
https://tomcat.apache.org/migration-10.1.html Using the migration tool, I have migrated the applications (which use Spring libraries 5.x). While testing the migrated apps( which use web socket), ran into: org.springframework.web.util.NestedServletException: Handler dispatch failed; nested exception is java.lang.NoSuchMethodError: 'void org.apache.tomcat.websocket.server.WsServerContainer.doUpgrade(jakarta.servlet.http.HttpServletRequest, jakarta.servlet.http.HttpServletResponse, jakarta.websocket.server.ServerEndpointConfig, java.util.Map) https://github.com/apache/tomcat/blob/9.0.x/java/org/apache/tomcat/websocket/server/WsServerContainer.java * @deprecated This method will be removed in Apache Tomcat 10.1 onwards. It has been replaced by * {@link #upgradeHttpToWebSocket(Object, Object, ServerEndpointConfig, Map)} */ @Deprecated public void doUpgrade(HttpServletRequest request, HttpServletResponse response, ServerEndpointConfig sec, Map<String, String> pathParams) throws ServletException, IOException { UpgradeUtil.doUpgrade(this, request, response, sec, pathParams); } Is this an issue with the migration tool to appropriately replace the removed methods? Or the applications using web sockets with Tomcat 9.x are required to be updated before moving to Tomcat 10.1, instead of using the migration tool as an intermediate step to upgrade to Tomcat 10.1 without having to update the applications at the same time? FWIW, Spring 5 to Spring 6 is a major upgrade and Tomcat 10 is a requirement. Appreciate the guidance. Thanks, Amit
