The Apache Tomcat team announces the immediate availability of Apache Tomcat 9.0.0.M21. Apache Tomcat 9 is an open source software implementation of the Java Servlet, JavaServer Pages, Java Unified Expression Language, Java WebSocket and JASPIC technologies. Apache Tomcat 9.0.0.M21 is a milestone release of the 9.0.x branch and has been made to provide users with early access to the new features in Apache Tomcat 9.0.x so that they may provide feedback. The notable changes compared to 9.0.0.M20 include: - Update the default URIEncoding for a Connector to UTF-8 as required by the Servlet 4.0 specification. - Various improvements to the handling of static custom error pages - Update to Eclipse JDT Compiler 4.6.3 Please refer to the change log for the complete list of changes: http://tomcat.apache.org/tomcat-9.0-doc/changelog.html Downloads: http://tomcat.apache.org/download-90.cgi Migration guides from Apache Tomcat 6.x, 7.x and 8.x: http://tomcat.apache.org/migration.html Join us at TomcatCon in Miami for 3 days of Apache Tomcat content: https://tomcat.apache.org/conference.html Enjoy! - The Apache Tomcat team