[ANN] Apache Tomcat 11.0.21 Available

Mark Thomas <[email protected]> Sat, 4 Apr 2026 13:03:34 +0100

Newsgroups	gmane.text.xml.xalan.devel,gmane.comp.apache.maven.announce,gmane.comp.jakarta.tomcat.user
Message-ID	<b78d54b9-b65d-4506-b929-712a8c9df0b9__1023.98263277195$1775304253$gmane$org@apache.org>

The Apache Tomcat team announces the immediate availability of Apache 
Tomcat 11.0.21.

Apache Tomcat 11 is an open source software implementation of the 
Jakarta Servlet, Jakarta Pages, Jakarta Expression Language, Jakarta 
WebSocket, Jakarta Authentication and Jakarta Annotations specifications.

The notable changes compared to 11.0.20 include:

- Fix a bug in the non-blocking flushing code for NIO+TLS that meant
   that a response may not have been fully written until the connection
   was closed. Pull request 966 provided by Phil Clay.

- Improved HTTP/2 error handling

- Better error handling for the EncryptInterceptor

Please refer to the change log for the complete list of changes:
http://tomcat.apache.org/tomcat-11.0-doc/changelog.html

Downloads:
http://tomcat.apache.org/download-11.cgi

Migration guides from Apache Tomcat 9.0.x and 10.1.x:
http://tomcat.apache.org/migration.html

Enjoy!

- The Apache Tomcat team