tf-nightly-2.0-preview's tf.summary doesn't work with tensorboard

[janosh]

System information

• Have I written custom code: no
• OS: macOS 10.14.4
• TensorFlow installed from: binary
• TensorFlow version: 2.0.0-dev20190410 (latest nightly)
• Python version: 3.6.7 (miniconda)

Current behavior & code to reproduce the issue

The following code

import tensorflow as tf

summary_writer = tf.summary.create_file_writer("tmp")

with summary_writer.as_default():
    for i in range(100):
        tf.summary.scalar("index", i, step=i)
summary_writer.close()

outputs an events file to /tmp but trying to view it with tensorboard --logdir ./tmp throws

Exception in thread Reloader:
AttributeError: module 'tensorflow._api.v2.compat.v1' has no attribute 'pywrap_tensorflow'

followed by

W0410 17:26:13.712886 123145489154048 core_plugin.py:172] Unable to get first event timestamp for run .: No event timestamp could be found

and an empty TB dashboard. I'm running the latest tb-nightly. Any ideas what's causing this?

Perhaps related:

• Tensorboard file writer not working any more after nightly build tf-nightly 1.14.1.dev20190410 #27713

[nfelt]

Closing this in favor of the tensorboard issue, tensorflow/tensorboard#2106

[tensorflow-bot]

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