Created by: minhozhou

环境：python3、最新pgl、paddle1.6、gpu环境 和example中的ges代码变动如下，就是step=5的时候提前break，程序会卡住：

def train(train_exe, exe, program, loss, node2vec_pyreader, args, train_steps):
    """ train
    """
    trainer_id = int(os.getenv("PADDLE_TRAINER_ID", "0"))
    step = 0
    while True:
        try:
            begin_time = time.time()
            loss_val, = train_exe.run(fetch_list=[loss])
            log.info("step %s: loss %.5f speed: %.5f s/step" %
                     (step, np.mean(loss_val), time.time() - begin_time))
            step += 1
            if step == 5:
                break
        except F.core.EOFException:
            node2vec_pyreader.reset()

        if (step % args.steps_per_save == 0 or
                step == train_steps) and trainer_id == 0:

            model_save_dir = args.output_path
            model_path = os.path.join(model_save_dir, str(step))
            if not os.path.exists(model_save_dir):
                os.makedirs(model_save_dir)
            F.io.save_params(exe, model_path, program)

        if step == train_steps:
            break

卡住的显示