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https://issues.apache.org/jira/browse/MAPREDUCE-7142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16621773#comment-16621773
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Akira Ajisaka commented on MAPREDUCE-7142:
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Applying this patch and HADOOP-15775, TestMRJobs passed.
> [JDK9] Add "--add-modules java.activation" to java option if the Java version
> is 9 or upper.
> --------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-7142
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7142
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Akira Ajisaka
> Assignee: Akira Ajisaka
> Priority: Critical
> Attachments: MAPREDUCE-7142.01.patch
>
>
> In Java 9, MapReduce job fails due to missing java.activation module, so we
> need to configure mapred-site.xml as follows to run MapReduce job:
> {code}
> <property name="yarn.app.mapreduce.am.admin-command-opts"
> value="--add-modules java.activation"/>
> <property name="mapreduce.map.java.opts" value="--add-modules
> java.activation"/>
> <property name="mapreduce.reduce.java.opts" value="--add-modules
> java.activation"/>
> {code}
> I'm thinking it's better to add "--add-modules java.activation" automatically.
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