@Marvin Prefect.yaml:

pull:
  - prefect.deployments.steps.set_working_directory:
      directory: /opt/prefect/src

deployments:
  - name: iceberg-sanity
    tags:
      - maintenance
      - de
    entrypoint: flows/iceberg_sanity.py:iceberg_sanity
    parameters:
      conf:
        p1: mountain
        p2: true
        p3:
          p4: 1
          p5: 2
    schedules:
      - cron: "0 * * * *"
        active: true
    work_pool:
      name: default-kubernetes-pool

Command:

prefect  --no-prompt deploy --all --prefect-file /prefect.yaml

Error:

Expecting value: line 1 column 1 (char 0)

What is the meaning of the error? HOw can I solve that?

The error message you are encountering,

Expecting value: line 1 column 1 (char 0)

, typically indicates a JSON parsing error. This suggests that the Prefect CLI is attempting to parse an empty string, an unexpected token, or malformed JSON as JSON data, which leads to a

JSONDecodeError

. Looking at the Prefect documentation links provided and the GitHub issue discussions related to similar error messages, I didn't find an exact match for your scenario. However, the error itself suggests a JSON-related problem that may occur due to the following reasons: 1. The file being read is not formatted correctly as valid YAML or has encoding issues. 2. The Prefect CLI expects a JSON response from an API call and encounters an empty response or HTML instead of JSON data. To solve the issue, you can try the following steps: - Check YAML Formatting: Ensure that your

prefect.yaml

file is correctly formatted and encodings are appropriate. YAML is sensitive to indentation, so any misplacement of spaces or tabs could result in an error. - Check File Encoding: Make sure the file encoding is UTF-8 without a Byte Order Mark (BOM). Some editors or systems may add a BOM or use different encodings that could cause parsing issues. - Validate YAML: You could use a YAML validation tool to check if the file content is valid YAML syntax. If these steps don't work or you need further assistance, it may be helpful to create an issue in the Prefect GitHub repository with the details of the error, the CLI command you ran, and the contents of your

prefect.yaml

file (appropriately redacted for sensitive information). This way, the Prefect maintainers or community can help diagnose the problem more effectively. Here are some relevant links: - Prefect Deployments with YAML - GitHub issue discussing JSONDecodeError If none of these suggestions resolve your issue, a more detailed investigation with access to your environment and the specifics of your Prefect setup might be necessary.