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Hi, I'm running into an error with flow.deploy(), ...
# ask-community
a
Hi, I'm running into an error with flow.deploy(), and trying to figure out how to troubleshoot. Any ideas? On one development machine, we get the expected result:
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\prefect\core\flow.py:1331: UserWarning: flow.deploy() will be deprecated in an upcoming release. Please use flow.register()
  UserWarning,
[2020-03-23 22:36:15,573] INFO - prefect.Docker | Building the flow's Docker storage...
On a second development machine, we get an error with not much context:
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/prefect/core/flow.py:1331: UserWarning: flow.deploy() will be deprecated in an upcoming release. Please use flow.register()
  UserWarning,
Expecting value: line 1 column 1 (char 0)
c
šŸ§ is there really no more traceback on the second machine?
(also FYI 
flow.deploy
will be removed in the next release so you should replace it with 
flow.register
ā€” same call signature just a different name)
a
yeah, no traceback
c
and the command returns after you see this printed? This will be a tough one to debug without being able to identify the line / command it originates from
a
Yes. Is there a flag or anything we can set to generate more verbose output?
That line is returned instead of the expected 
INFO - prefect.Docker | Building the flow's Docker storage...
2nd machine (the failing one) is a mac. 1st machine is windows
c
Because no error is raised, this issue is bubbling up from somewhere deeper than prefect I think, most likely with docker. Are you hardcoding a value of 
base_url
in your docker storage?
a
We are passing local_image. If I understand right that is in place of 
base_url
If I rewrite our deployment script to use 
flow.register
and to use the Dockerfile approach instead of a base docker image, is there a chance that is more stable than 
flow.deploy
and using a base image?
Are there any verbosity settings in Prefect--or in docker that you may be aware of--that might shed more light on the error?
c
none that come to mind ā€” @josh have you ever seen this particular error before?
j
Really weird, I have not seen this before. There is the Prefect config option for debug logging but Iā€™m not sure what else it would show you:
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[logging]
level = "DEBUG"
or
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export PREFECT__LOGGING__LEVEL="DEBUG"
a
The user does not have an account in Prefect Cloud yet -- that is my working hypothesis
Unfortunately I am getting an error trying to add the user
a
Randomly bumped into the same issue: 
simplejson.errors.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
. The error is indeed because I tried to 
flow.register(build=True)
without running 
prefect auth login
in CLI (or logging in inside the python script itself) beforehand. Maybe a better error would help others in future.
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