Distributed TensorFlow Cannot Use tf.variable

The following error occurs when tf.variable is used across multiple machines or multiple cards:

WARNING:tensorflow:Gradient is None for variable:v0/tower_0/UNET_v7/sub_pixel/Variable:0.Make sure this variable is used in loss computation.

Distributed TensorFlow needs to use tf.get_variable instead of tf.variable.

Replace tf.variable in the boot file with tf.get_variable.

Parent topic: Service Code Issues

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