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https://issues.apache.org/jira/browse/KAFKA-12610?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Egerton resolved KAFKA-12610.
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Fix Version/s: 3.4.0
Resolution: Fixed
> Resources on classpath break PluginClassLoader isolation
> --------------------------------------------------------
>
> Key: KAFKA-12610
> URL: https://issues.apache.org/jira/browse/KAFKA-12610
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 2.3.1, 2.4.1, 2.5.1, 2.7.0, 2.6.1
> Reporter: Nigel Liang
> Assignee: Greg Harris
> Priority: Major
> Labels: connect
> Fix For: 3.4.0
>
>
> The `PluginClassLoader` does not override `getResource` method it inherits
> from `ClassLoader` . The default implementation searches for resources in
> parent loader before calling its own `findResource` method. The result of
> this is that connectors or dependencies of connectors attempting to read
> resources in jars that may exist on the classpath get the version of the
> resource from the jar on classpath instead of from the jar in pluginpath.
> I have put together a testcase to demonstrate this issue at
> https://github.com/ncliang/get-resource-example/blob/classpath-resource-leaks/src/test/java/com/nigelliang/PluginClassLoaderTest.java
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