Enable debug logging for Log4J2 + Apache HttpClient

Question

im trying to activate the debug logging for my Apache HttpClient but cant make it work (getting no logging output at all which is HttpClient related).

This is my log

Answer 1

Remko is right that the issue is httpcomponents using log4j-1.2 internally. The adaptor that routes log4j 1.2 to log4j 2 is called the log4j 1.2 bridge and is described here: https://logging.apache.org/log4j/2.x/log4j-1.2-api/index.html.

The maven artifacts page for log4j explains exactly how to configure your maven dependencies to include the bridge library:

Log4j 1.x API Bridge

If existing components use Log4j 1.x and you want to have this logging routed to Log4j 2, then remove any log4j 1.x dependencies and add the following.

  
    org.apache.logging.log4j
    log4j-1.2-api
    2.5
  

From https://logging.apache.org/log4j/2.x/maven-artifacts.html