This vulnerability impacts Log4J version 2.x, version 1.2 is not affected (source). Norconex HTTP Collector version 2.x use Log4J v1.2.17 and thus are not affected. Version 3 of the Collector uses Log4J v2.17.1, which Apache has patched.
Note: Unless you made it so on purpose, the HTTP Collector does not run as a service accessible from the internet.
Harinder Hanjan
Harinder has over 15 years of Software Development and Consulting experience with small and large organizations. His specialty is in the world of Enterprise Search.