title: Why does Log4J2 output differ on two systems when I am writing the same UTF-8?
body: <p>I'm writing Unicode characters to a Log4J2 log.  On one machine (Windows 8) I see this in the log:</p>
  
  <pre><code>2016-08-30 16:44:00.958|English:  The quick brown fox jumped over the lazy dog.
  2016-08-30 16:44:00.960|German:  Falsches Üben von Xylophonmusik quält jeden größeren Zwerg.
  2016-08-30 16:44:00.960|Russian 1:  В чащах юга жил бы цитрус? Да, но фальшивый экземпляр!
  2016-08-30 16:44:00.960|Russian 2:  Съешь же ещё этих мягких французских булок да выпей чаю.
  2016-08-30 16:44:00.960|Chinese:  中国智造，慧及全球
  2016-08-30 16:44:00.960|Japanese:  いろはにほへと ちりぬるを わかよたれそ つねならむ うゐのおくやま けふこえて あさきゆめみし ゑひもせす
  2016-08-30 16:44:00.960|Korean:  다람쥐 헌 쳇바퀴에 타고파
  </code></pre>
  
  <p>On another machine (Windows Server 2012R2) I see this:</p>
  
  <pre><code>2016-08-30 16:50:41.676|English:  The quick brown fox jumped over the lazy dog.
  2016-08-30 16:50:41.676|German:  Falsches Üben von Xylophonmusik quält jeden größeren Zwerg.
  2016-08-30 16:50:41.676|Russian 1:  ? ????? ??? ??? ?? ??????? ??, ?? ????????? ?????????!
  2016-08-30 16:50:41.676|Russian 2:  ????? ?? ??? ???? ?????? ??????????? ????? ?? ????? ???.
  2016-08-30 16:50:41.676|Chinese:  ?????????
  2016-08-30 16:50:41.676|Japanese:  ??????? ????? ?????? ????? ??????? ????? ??????? ?????
  2016-08-30 16:50:41.676|Korean:  ??? ? ???? ???
  </code></pre>
  
  <p>If Log4J2 writes UTF-8 by default, why does the log file on the 2nd system contain only question marks?  That is, the second system <em>may</em> (and probably <em>is</em>) missing fonts, but the log file itself on the 2nd system contains actual question marks when, using a hexdump tool, I would expect to see at least the binary for the UTF-8 characters in the file.  Put another way, I can understand why an unknown character might <em>render</em> incorrectly, I just don't understand why the correct Unicode was not written to the file, if the process doing the writing is the JVM, which uses Unicode for characters.</p>