When calling `flow register` I m seeing the following strang Prefect Community #ask-community

When calling `flow.register` I'm seeing the follow...

Joseph Finlayson

11/27/2020, 12:51 PM

When calling

flow.register

I'm seeing the following strange stack:

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flow.register(project_name="default")
  File "/home/joe/.local/share/virtualenvs/flows/lib/python3.8/site-packages/prefect/core/flow.py", line 1655, in register
    registered_flow = client.register(
  File "/home/joe/.local/share/virtualenvs/flows/lib/python3.8/site-packages/prefect/client/client.py", line 771, in register
    serialized_flow = flow.serialize(build=build)  # type: Any
  File "/home/joe/.local/share/virtualenvs/flows/lib/python3.8/site-packages/prefect/core/flow.py", line 1462, in serialize
    storage = self.storage.build()  # type: Optional[Storage]
  File "/home/joe/.local/share/virtualenvs/flows/lib/python3.8/site-packages/prefect/environments/storage/docker.py", line 359, in build
    self._build_image(push=push)
  File "/home/joe/.local/share/virtualenvs/flows/lib/python3.8/site-packages/prefect/environments/storage/docker.py", line 423, in _build_image
    self._parse_generator_output(output)
  File "/home/joe/.local/share/virtualenvs/flows/lib/python3.8/site-packages/prefect/environments/storage/docker.py", line 658, in _parse_generator_output
    output = (
AttributeError: 'NoneType' object has no attribute 'strip'
  `

🤷‍♂️ 1

👍 1

Joseph Finlayson

11/27/2020, 12:59 PM

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output = (
                    parsed.get("stream")
                    or parsed.get("message")
                    or parsed.get("errorDetail", {}).get("message")
                ).strip("\n")
                if output:
                    print(output)

This is the culprit, if you need to assert the output you can't blindly strip it

Joseph Finlayson

11/27/2020, 1:16 PM

The guilty field is

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{'stream': 'Removing intermediate container e92479882653\n'}
Removing intermediate container e92479882653
{'stream': ' ---> 91c2b194ac0a\n'}
 ---> 91c2b194ac0a
{'aux': {'ID': 'sha256:91c2b194ac0a59b440144e8ab680aee2152fc2dba0b86c112c1116eca256aed4'}}

This docker edge case should be accounted for

felipe

11/27/2020, 2:46 PM

I saw that error yesterday on version 0.13.17. 0.13.16 working perfectly.

👍 1

Steven Hamblin

11/27/2020, 3:15 PM

We’re seeing that today too, though I was having it on 0.13.14.

Robin

11/27/2020, 6:47 PM

same

Joseph Finlayson

11/27/2020, 8:43 PM

who do we ping to patch this @Zanie

Joseph Finlayson

11/27/2020, 8:44 PM

@Michael Adkins

Zanie

11/27/2020, 10:04 PM

Hi. Prefect is closed today, but this fix is in master already https://github.com/PrefectHQ/prefect/pull/3717

Zanie

11/27/2020, 10:05 PM

We’ve also added coverage for this case. Unfortunately, integration tests with docker isn’t setup in CI yet and this was missed in the manual testing.

Zanie

11/27/2020, 10:11 PM

Also thanks for providing the offending field! I was quite curious if it was something we should be logging.

😀 2

Sagun Garg

12/28/2020, 9:01 AM

@Zanie I am still getting this error with new version of Prefect 14.0 When I am following these module path names in files param of docker storage

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