title: The neural network model is training the first Epoch and reports Warning, and then continues the training cycle from the beginning
body: <p>The neural network model is training the first Epoch and reports Warning, and then continues the training cycle from the beginning. How can I solve it?</p>
  <p>The neural network model reported an error during the first Epoch training.</p>
  <pre><code>“12872/21931 [================&gt;.............] - ETA: 3:55:38 - loss: 1.8393 - accuracy: 0.7415/usr/local/python3/lib/python3.6/site-packages/keras/utils/data_utils.py:616: UserWarning: The input 12494 could not be retrieved. It could be because a worker has died.”
  </code></pre>
  <p>Then it will continue to re-train from the first Epoch. How to solve this situation? Thank you!</p>