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https://issues.apache.org/jira/browse/HADOOP-17049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17110851#comment-17110851
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Wei-Chiu Chuang commented on HADOOP-17049:
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IIRC jakarta.activation-api was introduced after jackson-databind 2.10 update,
and according to the commit log in jackson-databind, it was required to support
JDK11. No idea whether that's true or not.
> javax.activation-api and jakarta.activation-api define overlapping classes
> --------------------------------------------------------------------------
>
> Key: HADOOP-17049
> URL: https://issues.apache.org/jira/browse/HADOOP-17049
> Project: Hadoop Common
> Issue Type: Bug
> Components: build
> Reporter: Akira Ajisaka
> Priority: Major
>
> There are some warnings in hadoop-client-runtime module.
> {noformat}
> [WARNING] javax.activation-api-1.2.0.jar, jakarta.activation-api-1.2.1.jar
> define 31 overlapping classes:
> [WARNING] - javax.activation.CommandInfo$Beans$1
> [WARNING] - javax.activation.ObjectDataContentHandler
> [WARNING] - javax.activation.DataContentHandlerFactory
> [WARNING] - javax.activation.DataContentHandler
> [WARNING] - javax.activation.CommandObject
> [WARNING] - javax.activation.SecuritySupport$2
> [WARNING] - javax.activation.FileTypeMap
> [WARNING] - javax.activation.CommandInfo
> [WARNING] - javax.activation.MailcapCommandMap
> [WARNING] - javax.activation.DataHandler$1
> [WARNING] - 21 more...
> {noformat}
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