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https://issues.apache.org/jira/browse/HADOOP-17326?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17643931#comment-17643931
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Akira Ajisaka commented on HADOOP-17326:
----------------------------------------
Is this issue still valid? It's set to blocker but there's no progress for more
than 2 years.
> mvn verify fails due to duplicate entry in the shaded jar
> ---------------------------------------------------------
>
> Key: HADOOP-17326
> URL: https://issues.apache.org/jira/browse/HADOOP-17326
> Project: Hadoop Common
> Issue Type: Bug
> Components: build
> Affects Versions: 3.2.2, 3.3.1, 3.4.0
> Reporter: Wei-Chiu Chuang
> Priority: Blocker
>
> Found this when I was chasing a separate shading error with [~smeng].
> In trunk:
> run mvn verify under hadoop-client-module/
> {noformat}
> [INFO]
> ------------------------------------------------------------------------
> [INFO] Reactor Summary for Apache Hadoop Client Modules 3.4.0-SNAPSHOT:
> [INFO]
> [INFO] Apache Hadoop Client Aggregator .................... SUCCESS [ 2.607
> s]
> [INFO] Apache Hadoop Client API ........................... SUCCESS [03:16
> min]
> [INFO] Apache Hadoop Client Runtime ....................... SUCCESS [01:30
> min]
> [INFO] Apache Hadoop Client Test Minicluster .............. FAILURE [04:44
> min]
> [INFO] Apache Hadoop Client Packaging Invariants .......... SKIPPED
> [INFO] Apache Hadoop Client Packaging Invariants for Test . SKIPPED
> [INFO] Apache Hadoop Client Packaging Integration Tests ... SKIPPED
> [INFO] Apache Hadoop Client Modules ....................... SKIPPED
> [INFO]
> ------------------------------------------------------------------------
> [INFO] BUILD FAILURE
> [INFO]
> ------------------------------------------------------------------------
> [INFO] Total time: 09:34 min
> [INFO] Finished at: 2020-10-23T16:38:53-07:00
> [INFO]
> ------------------------------------------------------------------------
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-shade-plugin:3.2.1:shade (default) on project
> hadoop-client-minicluster: Error creating shaded jar: duplicate entry:
> META-INF/services/org.apache.hadoop.shaded.com.fasterxml.jackson.core.JsonFactory
> -> [Help 1]
> [ERROR]
> [ERROR] To see the full stack trace of the errors, re-run Maven with the -e
> swit
> {noformat}
> This is reproducible in trunk and branch-3.3. However, not reproducible in
> branch-3.1.
> (branch-3.3 has a different error:
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-shade-plugin:3.2.1:shade (default) on project
> hadoop-client-minicluster: Error creating shaded jar: duplicate entry:
> META-INF/services/org.apache.hadoop.shaded.javax.ws.rs.ext.MessageBodyReader
> -> [Help 1])
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