Update docs to prevent null pointer exception when instrumenting log4j
Update docs to prevent null pointer exception when instrumenting log4j
signalfx/metrics,mspiegel/metrics,egymgmbh/metrics,cirrus-dev/metrics,tempredirect/metrics,thelastpickle/metrics,timezra/metrics,ind9/metrics,mt0803/metrics,Banno/metrics,valery1707/dropwizard-metrics,slachiewicz/metrics,dropwizard/metrics,slovdahl/metrics,randomstatistic/metrics,dropwizard/metrics,mtakaki/metrics,AltitudeDigital/metrics,gburton1/metrics,jplock/metrics,jasw/metrics,bentatham/metrics,mveitas/metrics,gburton1/metrics,ohr/metrics,dropwizard/metrics,chenxianghua2014/metrics,mattnelson/metrics,rexren/metrics,mnuessler/metrics,kevintvh/metrics,unitsofmeasurement/metrics,ChetnaChaudhari/metrics,wfxiang08/metrics,mveitas/metrics