// information: org.apache.hadoop.security.token.
// SecretManager$InvalidToken: StandbyException
//
HttpServletResponse response = mock(HttpServletResponse.class);
ExceptionHandler eh = new ExceptionHandler();
eh.initResponse(response);
// The Response (resp) below is what the server will send to client
//
// BEFORE HDFS-6475 fix, the resp.entity is
// {"RemoteException":{"exception":"SecurityException",