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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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)