https://github.com/daniel-beck/jenkins/commit/1fe9cf7b7ada45230f2bc5b8e2f1bdb93175ff9f#diff-49d2f2586d540028b95d6d18f5b4d91bR167

byte should use "UTF-8" - but really the code should be using StandardCharsets.UTF_8

The oracle (and presumable OpenJDK) have alieases fro UTF8 to UTF-8 but other vendors may not.