[jira] [Created] (FLINK-14808) ClientUtils set thread ClassLoader that is different from the user cl of PackagedProgram

[Shang Yuanchun (Jira)]

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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