startContainers(StartContainersRequest requests) throws YarnException,
IOException {
StartContainersRequestProto requestProto =
((StartContainersRequestPBImpl) requests).getProto();
try {
return new StartContainersResponsePBImpl(proxy.startContainers(null,
requestProto));
} catch (ServiceException e) {
RPCUtil.unwrapAndThrowException(e);
return null;
}