[ANN] Apache Tomcat 10.0.21 available

[Mark Thomas <ma...@apache.org>]

The Apache Tomcat team announces the immediate availability of Apache
Tomcat 10.0.21.

This release is targeted at Jakarta EE 9.

Applications that run on Tomcat 9 and earlier will not run on Tomcat 10 
without changes. Java EE applications designed for Tomcat 9 and earlier 
may be placed in the $CATALINA_BASE/webapps-javaee directory and Tomcat 
will automatically convert them to Jakarta EE and copy them to the 
webapps directory. This conversion is performed using the Apache Tomcat 
migration tool for Jakarta EE tool which is also available as a separate 
download for off-line use.

Apache Tomcat 10 is an open source software implementation of the
Jakarta Servlet, Jakarta Server Pages, Jakarta Expression Language,
Jakarta WebSocket, Jakarta Authentication and Jakarta Annotations
specifications.

The notable changes compared to 10.0.20 include:

- Provide a property source that sources values from Kubernetes service
   bindings. Provided by Sumit Kulhadia and Gareth Evans.

- The root cause of the Linux kernel duplicate accept bug has been
   identified along with the version of the kernel that includes the fix.
   The error message displayed when this bug occurs has been updated to
   reflect this new information and to advise users to update to a
   version of the OS that uses kernel 5.10 or later. Thanks to
   Christopher Gual for the research into this issue.

- Update the packaged version of the Tomcat Native Library to 1.2.33 to
   pick up Windows binaries built with OpenSSL 1.1.1o.

Please refer to the change log for the complete list of changes:
http://tomcat.apache.org/tomcat-10.0-doc/changelog.html

Downloads:
http://tomcat.apache.org/download-10.cgi

Migration guides from Apache Tomcat 7.0.x, 8.5.x and 9.0.x:
http://tomcat.apache.org/migration.html

Enjoy!

- The Apache Tomcat team

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