Bad Message 400

[Silvio Bierman <sbierman@xxxxxxxxxxxxxxxxxx>]

    Hi,
    
    I run embedded Jetty 11.0.13. I have a single servlet instance and
    call ServletContextHandler#setErrorHandler(customHandler) during
    initialization. But whenever an invalid URL (like one containing
    empty segments) the handle method of the custom errorhandler is not
    called. Instead the message

Bad Message 400

reason: Ambiguous URI empty segment

is generated. Similarly requests with a bad SNI seem to generate a page that does not go through the custom handler.

What am I doing wrong? How can I catch these and generate my own error pages?

Kind regards,

Silvio