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https://issues.apache.org/jira/browse/FLINK-15635?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jark Wu closed FLINK-15635.
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Release Note: TableEnvironment introduces a user class loader to have a
consistent class loading behavior in table programs, SQL Client and SQL
Gateway. The user classloader manages all user jars such as jar added by `ADD
JAR` or `CREATE FUNCTION .. USING JAR ..` statements. User-defined
functions/connectors/catalogs should replace
`Thread.currentThread().getContextClassLoader()` with the user class loader to
load classes. Otherwise, ClassNotFoundException maybe thrown. The user class
loader can be accessed via `FunctionContext#getUserCodeClassLoader`,
`DynamicTableFactory.Context#getClassLoader` and
`CatalogFactory.Context#getClassLoader`.
Resolution: Fixed
> Allow passing a ClassLoader to EnvironmentSettings
> --------------------------------------------------
>
> Key: FLINK-15635
> URL: https://issues.apache.org/jira/browse/FLINK-15635
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / API
> Reporter: Timo Walther
> Assignee: Francesco Guardiani
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.16.0
>
>
> We had a couple of class loading issues in the past because people forgot to
> use the right classloader in {{flink-table}}. The SQL Client executor code
> hacks a classloader into the planner process by using {{wrapClassLoader}}
> that sets the threads context classloader.
> Instead we should allow passing a class loader to environment settings. This
> class loader can be passed to the planner and can be stored in table
> environment, table config, etc. to have a consistent class loading behavior.
> Having this in place should replace the need for
> {{Thread.currentThread().getContextClassLoader()}} in the entire
> {{flink-table}} module.
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