It appears that the Valve interface javadoc hasn't been updated since around TC 5.5. Here is a snip of what it currently available from TC's website (6.0.20 I would guess):

"
# If the corresponding Response was not generated (and control was not returned, call the next Valve in the pipeline (if there is one) by executing context.invokeNext().

.
.
.

# Modify the HTTP headers included with the Response after the invokeNext() method has returned.
# Perform any actions on the output stream associated with the specified Response after the invokeNext() method has returned.
"

The invokeNext method has not existed in the Valve interface in many versions. I believe the replacement is:

this.getNext().invoke(request, response)

I'm happy to provide a doc patch if getNext().invoke(request, response) is the expected replacement for invokeNext(request, response).

Note that the docs for 5.5 also have the same problem. Please let me know if I should log that separately.