Jingsong Lee created FLINK-14808:
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Summary: ClientUtils set thread ClassLoader that is different from
the user cl of PackagedProgram
Key: FLINK-14808
URL: https://issues.apache.org/jira/browse/FLINK-14808
Project: Flink
Issue Type: Bug
Components: Client / Job Submission
Reporter: Jingsong Lee
Fix For: 1.10.0
In ClientUtils.executeProgram, it create a new userCodeClassLoader and set it
to thread context. (Name it cl1).
But in PackagedProgram, it use a different class loader to create user Class.
(Name it cl2).
So in user's code, if user use thread loader to create a class, this class is
come from cl1, if user want to work this class with their own class, there
should be a failure, because them come from different class loader.
Root cause: https://issues.apache.org/jira/browse/FLINK-14745
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