Re: Log headers for failing request

Mark Thomas <[email protected]> Fri, 5 Jun 2026 16:22:19 +0100

Newsgroups	gmane.comp.jakarta.tomcat.user
Message-ID	<[email protected]>

On 05/06/2026 13:56, Harri Pesonen via users wrote:
> How to log HTTP headers for POST request that fails with 400 Bad Request so that the request does not go to application at all?
> It can be seen in access log only.
> I would like to see the headers or the full request.
> I suspect that client sends content-type somehow incorrectly.
> There is nothing in catalina log.

Tomcat version?

HTTP version?

Try adding

-Dorg.apache.juli.logging.UserDataHelper.CONFIG=INFO_ALL

to JAVA_OPTS.

Mark