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Posted to issues@flink.apache.org by "Xuannan Su (Jira)" <ji...@apache.org> on 2023/04/26 02:19:00 UTC

[jira] [Created] (FLINK-31943) Multiple t_env cause class loading problem

Xuannan Su created FLINK-31943:
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             Summary: Multiple t_env cause class loading problem
                 Key: FLINK-31943
                 URL: https://issues.apache.org/jira/browse/FLINK-31943
             Project: Flink
          Issue Type: Bug
          Components: API / Python
    Affects Versions: 1.17.0
            Reporter: Xuannan Su
         Attachments: flink-sql-connector-kafka-1.17.0.jar, pyflink_classloader.py

When a PyFlink process creates multiple StreamTableEnvironment with different EnvironmentSettings and sets the "pipeline.jars" at the first created t_env, it appears that the jar is not added to the classloader of the first created t_env.

 

After digging a little bit, the reason may be that when creating the second table environment with a new EnvironmentSettings, the context classloader overwrites by a new classloader, see `EnvironmentSettings.Builder.build` method.

 

I uploaded the script to reproduce the problem.



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