SEVERE: Error reading tld listeners java.lang.NullPointerException, the error appears to come from log4j.
I came across this error when reloading a context in Tomcat 5.5.23.
The solution appeared to be to remove commons-logging from WEB-INF/lib of my web app. I’d only added it because Jakarta’s HttpClient insisted on it.
Once again, when in doubt, blame commons-logging.