HDFS and S3 support of `tf.io.gfile` with `tensorflow-io`

[y-tag]

Since TensorFlow 2.6, the HDFS and S3 support of tf.io.gfile have moved to tensorflow-io package (tensorflow/tensorflow#51583).
Therefore, TensorBoard with TensorFlow 2.6 can not read files in the HDFS or S3 as it is.

Explicitly importing tensorflow_io module before running TensorBoard is helpful for me.

python -c 'import tensorflow_io,tensorboard.main; tensorboard.main.run_main()' --port 6066 --logdir hdfs://path/to/dir

However, it might be better to import tensorflow_io automatically in TensorBoard if the package is installed.

[japie1235813]

Thanks for the feedback. We will look into this and conditionally import tensorflow_io in TB

[spolloni]

@y-tag why was this closed?

[y-tag]

Oh, it's just mistake... 😓