Concurrent access to Integration Server services by using the HTML <frameset> tag results in a "500 Internal Server Error" response code in Application Platform applications.

The issue is resolved. The Application Platform Tomcat webMethods custom tag library is now thread-safe. You can use the new session concurrency filter to serialize Integration Server service requests executed by a WAR application. The filter serializes concurrent requests for a session ID. No changes are required in your existing JSP pages.

Application Platform Tomcat supports a new custom shared classloader. Integration Server ServerClassLoader classes can be resolved from WAR projects.