When the Webserver Agent is active in Apache 2.4 and request parameter capturing is enabled, Apache returns HTTP status code 413 instead of 200.
Update Apache. If this is not feasible, set the debug flag debugEnableInputFilterRemovalNative to true. Note however that this debug flag may cause request parameters to be omitted from capturing.
The Apache agent uses an input filter to capture request parameters. In previous versions this filter was removed from the filter chain after it was called once, this may cause request parameters not to be captured. Dynatrace fixed this but we alsso found out that our fix triggers an Apache 2.4 bug. This bug has already been fixed: https://bz.apache.org/bugzilla/show_bug.cgi?id=54435