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https://issues.apache.org/jira/browse/FLINK-31398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17706261#comment-17706261
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Weijie Guo commented on FLINK-31398:
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[~luoyuxia] I'd like to fix this to address the problem of FLINK-31629.
> Don't wrap with TemporaryClassLoaderContext in OperationExecutor
> ----------------------------------------------------------------
>
> Key: FLINK-31398
> URL: https://issues.apache.org/jira/browse/FLINK-31398
> Project: Flink
> Issue Type: Improvement
> Components: Connectors / Hive, Table SQL / Client
> Reporter: luoyuxia
> Priority: Major
>
> Currently, method OperationExecutor#executeStatement in sql client will wrap
> currently with `
> sessionContext.getSessionState().resourceManager.getUserClassLoader()`.
> Actually, it's not necessary. What' worse,
> it'll will cause the exception 'Trying to access closed classloader. Please
> check if you store xxx' after quiting sql client.
> The reason is in `ShutdownHookManager`, it will register a hook after jvm
> shutdown. In `ShutdownHookManager`, it will
> create `Configuration`. It will then access
> `Thread.currentThread().getContextClassLoader()` which is
> FlinkUserClassLoader, the FlinkUserClassLoader has been closed before. So,
> it'll then cause `'Trying to access closed classloader` exception.
>
>
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