log4j:WARN No appenders could be found for logger (org.apache.hc.client5.http.impl.classic.InternalHttpClient)

Question

I've implemented a simple Java app that uses httpclient 5.1.3. I'm also using log4j2 (2.1.9) and have configured it emit log entries at the wire level. I know the log4j2 config is loaded because I can see my file appender working when I emit log messages from my app.

I don't understand why httpclient logging reports no appenders for org.apache.hc.client5.http.impl.classic.InternalHttpClient or for the asynch class if I change my app to use asynch protocol. Please help.

My log4j2 config:

  <Appenders>
    <Console name="Console">
      <PatternLayout pattern="%d %-5level [%logger] %msg%n%xThrowable" />
    </Console>
   <File name="MyFile" fileName="c:/a/app.log">
      <PatternLayout>
        <Pattern>%d %p %c{1.} [%t] %m%n</Pattern>
      </PatternLayout>
    </File>
  </Appenders>
  <Loggers>
    <Logger name="org.apache.hc.client5.http" level="DEBUG">
      <AppenderRef ref="Console"/>
    </Logger>
    <Logger name="org.apache.hc.client5.http.wire" level="DEBUG">
      <AppenderRef ref="Console"/>
    </Logger>
     <Logger name="org.apache.hc.client5.http.impl.classic.InternalHttpClient" level="DEBUG">
      <AppenderRef ref="Console"/>
    </Logger>
    <Root level="INFO">
      <AppenderRef ref="MyFile" />
    </Root>
  </Loggers>
</Configuration>

I could sure use some help. Thanks.