NullPointerException in ServletDefinition:215

[kurtseebauer]

Hi all,

in com/google/inject/servlet/ServletDefinition.java, Line 215

              pathInfo = requestUri.substring(getContextPath().length()).replaceAll("[/]{2,}", "/");

a NullPointerException is thrown when getContextPath() returns null. My understanding of the javadoc on javax.servlet.http.HttpServletRequest.getContextPath() is that it should never be null, but it happens.

In my case I'm running a dropwizard application with the elastic apm agent and graphql-java.
The elastic apm java agent calls this method at the end of an apm-transaction, with instrumentation enabled. It seems to work fine for all servlets, except the graphql one. I checked my setup/config multiple times, but cannot detect anything wrong.

Is there a chance we can introduce a null-check before calling length() on the context path?
Can I help with more info?

Thank you!

[mustafa-zidan]

👍🏽