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https://issues.apache.org/jira/browse/CALCITE-4935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17457780#comment-17457780
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Jacques Nadeau commented on CALCITE-4935:
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Hey [~zabetak],
You probably need to enable several resource transformers. For maven's shade
plugin they are here:
https://maven.apache.org/plugins/maven-shade-plugin/examples/resource-transformers.html.
For example, the meta-inf example needs ServicesResourceTransformer.
For gradle shadowjar, I'm not sure the similar item. It looks like maybe
"mergeServiceFiles()" per https://github.com/johnrengelman/shadow/issues/105
> Avatica standalone-server shades log4j without relocation
> ---------------------------------------------------------
>
> Key: CALCITE-4935
> URL: https://issues.apache.org/jira/browse/CALCITE-4935
> Project: Calcite
> Issue Type: Bug
> Components: avatica
> Reporter: Stamatis Zampetakis
> Assignee: Stamatis Zampetakis
> Priority: Major
> Fix For: avatica-1.20.0
>
> Attachments: screenshot-1.png
>
>
> The issue has been found during the vote for avatica-1.20.0 RC0.
> The standalone-server jar in the [staged maven
> repository|https://repository.apache.org/content/repositories/orgapachecalcite-1122/org/apache/calcite/avatica/avatica-standalone-server/1.20.0/avatica-standalone-server-1.20.0.jar]
> contains log4j2 classes but they are not relocated.
> In previous, Avatica versions (e.g., avatica-1.19.0), log4j classes were all
> relocated to avoid classpath problems with other libraries/apps potentially
> using another log4j2 version.
> It seems that relocation was dropped in possibly unintenionally in
> CALCITE-4152.
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