tensorflow.python.framework.错误_impl.InvalidArgumentError：索引[27,4,0]=1不在[0，31488]中

Question

当我运行shell演练训练一个很好的英德语翻译模型时使用了Transformer模型，但是我遇到了问题。 我的问题是：

INFO:tensorflow:Total trainable variables size: 60276736
INFO:tensorflow:Total embedding variables size: 16384
INFO:tensorflow:Total non-embedding variables size: 60260352
INFO:tensorflow:Computing gradients for global model_fn.
INFO:tensorflow:Global model_fn finished.
INFO:tensorflow:Create CheckpointSaverHook.
2017-06-30 15:05:58.562782: W tensorflow/core/platform/cpu_feature_guard.cc:45] The TensorFlow library wasn't compiled to use SSE4.1 instructions, but these are available on your machine and could speed up CPU computations.
2017-06-30 15:05:58.562814: W tensorflow/core/platform/cpu_feature_guard.cc:45] The TensorFlow library wasn't compiled to use SSE4.2 instructions, but these are available on your machine and could speed up CPU computations.
2017-06-30 15:05:58.562820: W tensorflow/core/platform/cpu_feature_guard.cc:45] The TensorFlow library wasn't compiled to use AVX instructions, but these are available on your machine and could speed up CPU computations.
2017-06-30 15:05:58.562824: W tensorflow/core/platform/cpu_feature_guard.cc:45] The TensorFlow library wasn't compiled to use AVX2 instructions, but these are available on your machine and could speed up CPU computations.
2017-06-30 15:05:58.562829: W tensorflow/core/platform/cpu_feature_guard.cc:45] The TensorFlow library wasn't compiled to use FMA instructions, but these are available on your machine and could speed up CPU computations.
Traceback (most recent call last):
File "/home/sycmss/tc/anaconda3/envs/tensorflow/lib/python3.4/site-packages/tensorflow/python/client/session.py", line 1139, in _do_call
return fn(*args)
File "/home/sycmss/tc/anaconda3/envs/tensorflow/lib/python3.4/site-packages/tensorflow/python/client/session.py", line 1121, in _run_fn
status, run_metadata)
File "/home/sycmss/tc/anaconda3/envs/tensorflow/lib/python3.4/contextlib.py", line 66, in exit
next(self.gen)
File "/home/sycmss/tc/anaconda3/envs/tensorflow/lib/python3.4/site-packages/tensorflow/python/framework/errors_impl.py", line 466, in raise_exception_on_not_ok_status
pywrap_tensorflow.TF_GetCode(status))
tensorflow.python.framework.errors_impl.InvalidArgumentError: indices[27,4,0] = -1 is not in [0, 31488)
[[Node: symbol_modality_31488_512/parallel_0/symbol_modality_31488_512/shared/Gather = Gather[Tindices=DT_INT32, Tparams=DT_FLOAT, validate_indices=true, _device="/job:localhost/replica:0/task:0/cpu:0"](symbol_modality_31488_512/parallel_0/symbol_modality_31488_512/shared/ConvertGradientToTensor_cc661786, symbol_modality_31488_512/parallel_0/symbol_modality_31488_512/shared/Squeeze)]]

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在处理上述异常时，发生了另一个异常：

^{pr2}$

我该如何解决这个问题？ 谢谢你