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https://issues.apache.org/jira/browse/FLINK-22517?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Flink Jira Bot updated FLINK-22517:
-----------------------------------
Labels: stale-assigned (was: )
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> Fix pickle compatibility problem in different Python versions
> -------------------------------------------------------------
>
> Key: FLINK-22517
> URL: https://issues.apache.org/jira/browse/FLINK-22517
> Project: Flink
> Issue Type: Bug
> Components: API / Python
> Affects Versions: 1.13.0, 1.12.3
> Reporter: Huang Xingbo
> Assignee: Huang Xingbo
> Priority: Major
> Labels: stale-assigned
>
> Since release-1.12, PyFlink has supported Python3 8. Starting from Python
> 3.8, the default protocol version used by pickle is
> pickle5(https://www.python.org/dev/peps/pep-0574/), which will raising the
> following exception if the client uses python 3.8 to compile program and the
> cluster node uses python 3.7 or python 3.6 to run python udf:
> {code:python}
> ValueError: unsupported pickle protocol: 5
> {code}
> The workaround is to first let the python version used by the client be 3.6
> or 3.7. For how to specify the client-side python execution environment,
> please refer to the
> doc(https://ci.apache.org/projects/flink/flink-docs-release-1.12/dev/python/python_config.html#python-client-executable).
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