“tensorflow.python.framework.errors_impl.FailedPreconditionError”同时运行“model_main_tf2.py”以在tensorflow中训练对象检测模型

Question

很多人也遇到过这个问题，但似乎总是因为命令行参数中的一些错误而发生

这是我正在运行的命令

!python "/content/drive/My Drive/Tensorflow/models/research/object_detection/model_main_tf2.py" --model_dir="/content/drive/My Drive/Tensorflow/ssd_mobilenet_v2_fpnlite_320x320_coco17_tpu-8" --pipeline_config_path="/content/drive/My Drive/Tensorflow/ssd_mobilenet_v2_fpnlite_320x320_coco17_tpu-8/pipeline.config"

里面似乎没有任何错误。

这是堆栈跟踪

    Traceback (most recent call last):
  File "/content/drive/My Drive/Tensorflow/models/research/object_detection/model_main_tf2.py", line 113, in <module>
    tf.compat.v1.app.run()
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/platform/app.py", line 40, in run
    _run(main=main, argv=argv, flags_parser=_parse_flags_tolerate_undef)
  File "/usr/local/lib/python3.6/dist-packages/absl/app.py", line 300, in run
    _run_main(main, args)
  File "/usr/local/lib/python3.6/dist-packages/absl/app.py", line 251, in _run_main
    sys.exit(main(argv))
  File "/content/drive/My Drive/Tensorflow/models/research/object_detection/model_main_tf2.py", line 110, in main
    record_summaries=FLAGS.record_summaries)
  File "/usr/local/lib/python3.6/dist-packages/object_detection/model_lib_v2.py", line 630, in train_loop
    manager.save()
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/training/checkpoint_management.py", line 819, in save
    self._record_state()
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/training/checkpoint_management.py", line 728, in _record_state
    save_relative_paths=True)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/training/checkpoint_management.py", line 248, in update_checkpoint_state_internal
    text_format.MessageToString(ckpt))
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/lib/io/file_io.py", line 570, in atomic_write_string_to_file
    rename(temp_pathname, filename, overwrite)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/lib/io/file_io.py", line 529, in rename
    rename_v2(oldname, newname, overwrite)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/lib/io/file_io.py", line 546, in rename_v2
    compat.as_bytes(src), compat.as_bytes(dst), overwrite)

错误信息：

tensorflow.python.framework.errors_impl.FailedPreconditionError: /content/drive/My Drive/Tensorflow/ssd_mobilenet_v2_fpnlite_320x320_coco17_tpu-8/checkpoint.tmp91048f3bf67645619be6603094546de1; Is a directory

错误来自_pywrap_file_io.RenameFile()，从哪里_pywrap_file_io导入tensorflow.python。我试图查看源代码以查找问题，但在任何地方都找不到。

问题是否会因为我在colab上运行而引起？

Tensorflow 版本：2.3 Python 版本：3.6

有人可以帮我解决这个问题。

Answer 1

问题是程序试图创建一个名为“checkpoint”的文件，但在下载的模型中有一个同名的文件夹。有两种方法可以解决这个问题，

1. 创建一个新文件夹并将其路径设置为--model_dir的参数
2. 检查是否有名为“ checkpoint ”的文件夹，如果有，则更改文件夹名称。就我而言，我将其更改为“ checkpoint0 ”。