default void handleAdminRequest(NetworkRequest request) throws InterruptedException, IOException {
    throw new UnsupportedOperationException("Admin request not supported on this node");
  }
Handles an administration request. These requests can query for or change the internal state of the server.
@param request the request that needs to be handled.
@throws IOException if there are I/O errors carrying our the required operation.
@throws InterruptedException if request processing is interrupted.
ambry-api/src/main/java/com/github/ambry/protocol/RequestAPI.java