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https://issues.apache.org/jira/browse/HADOOP-12698?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15090307#comment-15090307
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Kai Sasaki commented on HADOOP-12698:
-------------------------------------
The error was caused by Javadoc error. Use of '_' induced only warning.
https://issues.apache.org/jira/browse/HADOOP-11875?focusedCommentId=15089497&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15089497
So currently building with javadoc option causes error. My build command was
this.
{code}
$ mvn package -Pdist,native,docs,src -DskipTests -Dtar
{code}
> Set default Docker build uses JDK7
> ----------------------------------
>
> Key: HADOOP-12698
> URL: https://issues.apache.org/jira/browse/HADOOP-12698
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Kai Sasaki
> Assignee: Kai Sasaki
> Priority: Minor
> Labels: build, docker
> Attachments: HADOOP-12698.01.patch
>
>
> The default JDK of build environment made by {{start-build-env.sh}} is JDK8
> from HADOOP-12562. Since current Hadoop trunk cannot be build by JDK8
> (HADOOP-11875), it is better to set the default JDK to JDK7 for now.
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