debug

Java環境変数に以下をセットする

-Dorg.apache.commons.logging.Log=org.apache.commons.logging.impl.SimpleLog -Dorg.apache.commons.logging.simplelog.showdatetime=true -Dorg.apache.commons.logging.simplelog.log.org.apache.http=DEBUG -Dorg.apache.commons.logging.simplelog.log.org.apache.http.wire=ERROR

参考

Commons Logging Examples

https://hc.apache.org/httpcomponents-client-ga/logging.html