函数实例在外部推断上下文中的索引：116处具有未定义的输入形状

问题描述

我使用TFF 0.12.0

每个客户在训练中有38张图像，在测试中有16张图像，我有4个客户，

我写了一个简单的联合学习代码：

.....

def create_compiled_keras_model():

    base_model = tf.keras.applications.resnet.resnet50(include_top=False,weights='imagenet',input_shape=(224,224,3,))
    global_average_layer = tf.keras.layers.GlobalAveragePooling2D()
    prediction_layer = tf.keras.layers.Dense(2,activation='softmax')

    model = tf.keras.Sequential([
                               base_model,global_average_layer,prediction_layer
                               ])
    return model
    

def model_fn():
    
    keras_model = create_compiled_keras_model()
  
    return tff.learning.from_keras_model(keras_model,sample_batch,loss=tf.keras.losses.CategoricalCrossentropy(),metrics=[tf.keras.metrics.CategoricalAccuracy()]) 

iterative_process = tff.learning.build_federated_averaging_process(model_fn,server_optimizer_fn=lambda: tf.keras.optimizers.SGD(learning_rate=1.0),client_optimizer_fn=lambda: tf.keras.optimizers.SGD(learning_rate=0.001),client_weight_fn=None)

state = iterative_process.initialize()

我不明白为什么要在执行中找到这些行：

2020-11-05 15:00:16.642666: W tensorflow/core/common_runtime/shape_refiner.cc:88] Function instantiation has undefined input shape at index: 32 in the outer inference context.
2020-11-05 15:00:16.642724: W tensorflow/core/common_runtime/shape_refiner.cc:88] Function instantiation has undefined input shape at index: 23 in the outer inference context.
2020-11-05 15:00:16.643344: W tensorflow/core/common_runtime/shape_refiner.cc:88] Function instantiation has undefined input shape at index: 51 in the outer inference context.
2020-11-05 15:00:16.643400: W tensorflow/core/common_runtime/shape_refiner.cc:88] Function instantiation has undefined input shape at index: 41 in the outer inference context.
2020-11-05 15:00:16.643545: W tensorflow/core/common_runtime/shape_refiner.cc:88] Function instantiation has undefined input shape at index: 69 in the outer inference context.
2020-11-05 15:00:16.643589: W tensorflow/core/common_runtime/shape_refiner.cc:88] Function instantiation has undefined input shape at index: 60 in the outer inference context.
2020-11-05 15:00:16.643696: W tensorflow/core/common_runtime/shape_refiner.cc:88] Function instantiation has undefined input shape at index: 97 in the outer inference context.
2020-11-05 15:00:16.643756: W tensorflow/core/common_runtime/shape_refiner.cc:88] Function instantiation has undefined input shape at index: 86 in the outer inference context.
2020-11-05 15:00:16.643923: W tensorflow/core/common_runtime/shape_refiner.cc:88] Function instantiation has undefined input shape at index: 106 in the outer inference context.
2020-11-05 15:00:16.643988: W tensorflow/core/common_runtime/shape_refiner.cc:88] Function instantiation has undefined input shape at index: 116 in the outer inference context.
2020-11-05 15:00:16.644071: W tensorflow/core/common_runtime/shape_refiner.cc:88] Function instantiation has undefined input shape at index: 79 in the outer inference context.
2020-11-05 15:00:16.644213: W tensorflow/core/common_runtime/shape_refiner.cc:88] Function instantiation has undefined input shape at index: 134 in the outer inference context.

知道如果我用VGG16更改resnet50，这些行将消失。 请帮忙 ！！这是什么意思？

解决方法

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