Tomcat 6 shows a weird Catalina log message

Question

I see tons of this error message in my Tomcat Catalina log:

Invalid chunk starting at byte [0] and ending at byte [0] with a value of [null] ignored 

Does anyone know what that means?

Answer 1

This is a small bug that was introduced in Apache 6.0.35 and fixed in Apache 6.0.36. This is caused by parameters with more than one & character:

From the change log :

Tomcat 6.0.36 (jfclere) released 2012-10-19

Catalina

[...]

Do not add extra '&' characters in the parameters as analysis errors. (Kkolinko)