Tensorboard: Error launching TensorBoard on Windows due to `%s` strftime specifier

[Origamichen]

TensorBoard version: 1.13.0
Tensorflow version: tensorflow-gpu 1.13.0rc2
OS Platform and version: Windows10 1803
Python version: 3.7

Hi,
Here's a minor error occurs when I run tensorboard 1.13.0. It is fixed by changing line 50 in tensorboard/manager.py
serialize=lambda dt: int(dt.strftime("%s")), to serialize=lambda dt: int(dt.strftime("%S")),
The "%s" is changed to "%S".

Traceback (most recent call last):
File "d:\programme\anaconda\Lib\runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "d:\programme\anaconda\Lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "D:\Workspace\Python\TensorflowVenv\TfEnv\Scriptstensorboard.exe__main__.py", line 9, in
File "d:\workspace\python\tensorflowvenv\tfenv\lib\site-packagestensorboard\main.py", line 57, in run_main
app.run(tensorboard.main, flags_parser=tensorboard.configure)
File "d:\workspace\python\tensorflowvenv\tfenv\lib\site-packages\absl\app.py", line 300, in run
_run_main(main, args)
File "d:\workspace\python\tensorflowvenv\tfenv\lib\site-packages\absl\app.py", line 251, in _run_main
sys.exit(main(argv))
File "d:\workspace\python\tensorflowvenv\tfenv\lib\site-packagestensorboard\program.py", line 228, in main
self._register_info(server)
File "d:\workspace\python\tensorflowvenv\tfenv\lib\site-packagestensorboard\program.py", line 274, in _register_info
manager.write_info_file(info)
File "d:\workspace\python\tensorflowvenv\tfenv\lib\site-packagestensorboard\manager.py", line 268, in write_info_file
payload = "%s\n" % _info_to_string(tensorboard_info)
File "d:\workspace\python\tensorflowvenv\tfenv\lib\site-packagestensorboard\manager.py", line 128, in _info_to_string
for k in _TENSORBOARD_INFO_FIELDS
File "d:\workspace\python\tensorflowvenv\tfenv\lib\site-packagestensorboard\manager.py", line 128, in
for k in _TENSORBOARD_INFO_FIELDS
File "d:\workspace\python\tensorflowvenv\tfenv\lib\site-packagestensorboard\manager.py", line 50, in
serialize=lambda dt: int(dt.strftime("%s")),
ValueError: Invalid format string

[xieyonglu]

Find the manger.py file in directory ..\Lib\site-packagestensorboard，and modify dt.strftime("%s") to dt.strftime("%S")

[stephanwlee]

@wchargin can you please TAL? It seems like something we should be able to fix.

[nfelt]

Hm, it looks like %s isn't actually cross-platform :( https://stackoverflow.com/a/11743262/1179226

The recommended workarounds are truly sad, but I guess we should change it to one of those.

FWIW, changing to %S (number of seconds, 0-59) is not a working replacement. @Origamichen @xieyonglu If you want a temporary workaround it's better to replace it with dt.strftime("0") which at least will consistently be the start of the unix Epoch instead of somewhere between 0-60 seconds after it.

[israfila3]

you can change the ("strftime("%s") to strftime("%S") ==> %s to %S") on line 50 in (site-packagestensorboard\manager.py )

[wchargin]

@israfila3: As noted above, that is not a sound replacement. Please see
@nickfelt’s comment if you want an immediate workaround. We plan to
release a TensorBoard 1.13.1 patch shortly (probably today) that will
contain the fix for this.