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https://issues.apache.org/jira/browse/HADOOP-8092?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer resolved HADOOP-8092.
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Resolution: Won't Fix
start-all is deprecated in recent releases. Closing this as won't fix.
> Hadoop DataNode cannot start up in Pseudo-Distributed mode using start-all.sh
> if it is run as root
> --------------------------------------------------------------------------------------------------
>
> Key: HADOOP-8092
> URL: https://issues.apache.org/jira/browse/HADOOP-8092
> Project: Hadoop Common
> Issue Type: Bug
> Components: scripts
> Affects Versions: 0.20.203.0
> Environment: Centos 5.6, Java 1.6 (Sun JDK)
> # java -version
> java version "1.6.0_31"
> Java(TM) SE Runtime Environment (build 1.6.0_31-b04)
> Java HotSpot(TM) 64-Bit Server VM (build 20.6-b01, mixed mode)
> # uname -a
> Linux server-56164 2.6.18-238.19.1.el5 #1 SMP Fri Jul 15 07:31:24 EDT 2011
> x86_64 x86_64 x86_64 GNU/Linux
> Pseudo-Distributed mode
> Reporter: Istvan Szegedi
>
> Hadoop DataNode cannot start-up if you run start-all.sh (or start-dfs.sh) as
> root.
> There is a HADOOP_OPTS setting in bin/hadoop file in case EUID equals 0 :
> ...
> elif [ "$COMMAND" = "datanode" ] ; then
> CLASS='org.apache.hadoop.hdfs.server.datanode.DataNode'
> if [[ $EUID -eq 0 ]]; then
> HADOOP_OPTS="$HADOOP_OPTS -jvm server $HADOOP_DATANODE_OPTS"
> else
> HADOOP_OPTS="$HADOOP_OPTS -server $HADOOP_DATANODE_OPTS"
> fi
> elif ...
> Since -jvm is not a recognized option by Sun HotSpot Java JVM (64-bit), an
> error message is generated:
> Unrecognized option: -jvm
> Could not create the Java virtual machine.
> If you replace -jvm server option with -server, DataNode will start up.
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