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https://issues.apache.org/jira/browse/HADOOP-13816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15695791#comment-15695791
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Akira Ajisaka commented on HADOOP-13816:
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LGTM, +1. The test failure is not related.
> Ambiguous plugin version warning from maven build.
> --------------------------------------------------
>
> Key: HADOOP-13816
> URL: https://issues.apache.org/jira/browse/HADOOP-13816
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 3.0.0-alpha2
> Reporter: Kai Sasaki
> Assignee: Kai Sasaki
> Priority: Minor
> Attachments: HADOOP-13816.01.patch
>
>
> When we try to build Hadoop with maven, the below warning is shown.
> {code}
> [WARNING]
> [WARNING] Some problems were encountered while building the effective model
> for org.apache.hadoop:hadoop-rumen:jar:3.0.0-alpha2-SNAPSHOT
> [WARNING] 'dependencies.dependency.(groupId:artifactId:type:classifier)' must
> be unique: com.fasterxml.jackson.core:jackson-databind:jar -> duplicate
> declaration of version (?) @ line 102, column 17
> [WARNING]
> [WARNING] Some problems were encountered while building the effective model
> for org.apache.hadoop:hadoop-build-tools:jar:3.0.0-alpha2-SNAPSHOT
> [WARNING] 'build.plugins.plugin.version' for
> org.apache.maven.plugins:maven-remote-resources-plugin is missing. @
> org.apache.hadoop:hadoop-build-tools:[unknown-version],
> /Users/sasakikai/dev/hadoop/hadoop-build-tools/pom.xml, line 80, column 15
> [WARNING] 'build.plugins.plugin.version' for
> org.apache.maven.plugins:maven-resources-plugin is missing. @
> org.apache.hadoop:hadoop-build-tools:[unknown-version],
> /Users/sasakikai/dev/hadoop/hadoop-build-tools/pom.xml, line 54, column 15
> {code}
> It is required to
> - remove duplicated definition {{jackson-databind}}
> - specify the version {{maven-resource-plugin}} and
> {{maven-remote-resources-plugin}}.
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