}
@Override
public void errorReport(NamenodeRegistration registration, int errorCode,
String msg) throws IOException {
ErrorReportRequestProto req = ErrorReportRequestProto.newBuilder()
.setErrorCode(errorCode).setMsg(msg)
.setRegistration(PBHelper.convert(registration)).build();
try {
rpcProxy.errorReport(NULL_CONTROLLER, req);
} catch (ServiceException e) {