JSONPath error in Content based router

I have a route like below http://0.0.0.0:8081/branch?httpMethodRestrict=PUT "/> java.lang.Exception $.[?(@.age20)]

DefaultTracer traceBeforeRoute not calling dumpTrace

In Camel 3.4.0 I am trying to customize the Tracing to use DEBUG level instead of INFO. For this, I created my own class extending org.apache.camel.impl.engine.DefaultTracer and overriding method dumpTrace. But dumpTrace is not being called in all cases, in particular, method traceBeforeRoute