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Posted to dev@flink.apache.org by "Gunnar Morling (Jira)" <ji...@apache.org> on 2022/12/19 15:26:00 UTC

[jira] [Created] (FLINK-30455) Avoid "cleaning" of java.lang.String in ClosureCleaner

Gunnar Morling created FLINK-30455:
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             Summary: Avoid "cleaning" of java.lang.String in ClosureCleaner
                 Key: FLINK-30455
                 URL: https://issues.apache.org/jira/browse/FLINK-30455
             Project: Flink
          Issue Type: Sub-task
            Reporter: Gunnar Morling


When running a simple "hello world" example on JDK 17, I noticed the closure cleaner tries to reflectively access the {{java.lang.String}} class, which fails due to the strong encapsulation enabled by default in JDK 17 and beyond. I don't think the closure cleaner needs to act on {{String}} at all, as it doesn't contain any inner classes. Unless there are objections, I'll provide a fix along those lines. With this change in place, I can run that example on JDK 17.



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