Download PNG is totally blank using tensorboard 1.5.0

Issue description

Image generated on “Download PNG” is totally blank with tensorboard 1.5.0.

Image generated on “Download PNG” is fine after replaced tensorboard 1.5.0 with tensorboard 0.4.0.

Environment

• PC 1 (GPU version): Windows 10 + Python 3.6.3 + TensorFlow-GPU 1.5.0 + Tensorboard 1.5.0 + CUDA 9.0 + cuDNN 7.0.5
• PC 2 (CPU version): Windows 7 + Python 3.6.3 + TensorFlow 1.5.0 + Tensorboard 1.5.0
• PC 3 (CPU version): Windows 7 + Python 3.6.3 + TensorFlow 1.5.0 + Tensorboard 1.5.0

Not tested on Linux yet.

Issue Steps

1. Install python 3.6.3, tensorflow 1.5.0 (GPU version or CPU version).

Dependency package tensorboard 1.5.0 will be installed with tensorflow 1.5.0.

1. Generate a log, such as the code below:

import tensorflow as tf

sess = tf.InteractiveSession()

with tf.name_scope('a'):
  a = tf.Variable(4, dtype=tf.int32)
with tf.name_scope('b'):
  b = tf.Variable(3, dtype=tf.int32)
with tf.name_scope('c'):
  c = tf.multiply(a, b)
tf.summary.scalar('output', c)

merged = tf.summary.merge_all()
summary, c_val = sess.run([merged, c], feed_dict={a: 4, b: 5})
writer = tf.summary.FileWriter(r"C:\tmp", graph=sess.graph)
writer.add_summary(summary)
writer.close()

1. Run tensorboard --logdir=C:\tmp, then open tensorboard (port 6006) in Chrome browser.

2. Click Download PNG on the left sidebar of TensorBoard - GRAPHS.

• File name: graph_large_attrs_key=_too_large_attrs&limit_attr_size=1024&run=.png
• File size: 3.06 KB
• File pixel: 495 * 286

1. Open the image, but the image shows nothing invalid. The image is totally blank.

Recovery Steps

1. Download “tensorflow_tensorboard-0.4.0-py3-none-any.whl” on PYPI

2. pip3 install tensorflow_tensorboard-0.4.0-py3-none-any.whl. After installation tensorboard 0.4.0, the tensorflow version is still 1.5.0.

3. Use the same log in Issue Step 2. Run tensorboard --logdir=C:\tmp, then open tensorboard (port 6006) in Chrome browser.

4. Click Download PNG on the left sidebar of TensorBoard - GRAPHS.

• File name: graph_large_attrs_key=_too_large_attrs&limit_attr_size=1024&run=D%5C.png
• File size: 11.9 KB
• File pixel: 495 * 286

1. Open the image, the image shows graph successfully.

[MrChenFeng]

Everything is okay with my Tensorboard, but when I try to download PNG, the downloaded file seems to be broken?

[udithhaputhanthri]

I think I also have the same problem. In the tensorboard on collab, download PNG gives “Failed- Forbidden” message. Is there any way to download the .png image.