Minor Description
The reconfiguration framework introduced from HDFS-7001 supports reload configuration from HTTP servlet, using ReconfigurableServlet. ReconfigurableServlet processes a HTTP GET request to list the differences between old and new configurations in HTML, with a form that allows the user to submit to confirm the configuration changes. However since the response lacks HTTP "content-type", the browser renders the page as text file, which makes it impossible to submit the form.