[MAPREDUCE-3432] Yarn doesn't work if JAVA_HOME isn't set

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Not A Problem
• Affects Version/s: 0.23.0
• Component/s: mrv2

Environment

OS/X, JAVA_HOME unset

• Assignee: Unassigned
• Reporter: Steve Loughran
• Created: 18/Nov/11 15:23
• Updated: 08/Feb/15 18:18
• Resolved: 08/Feb/15 18:18

Description

libexec/hadoop-config.sh does reliably work out JAVA_HOME for many platforms. unfortunately, the yarn scripts don't use it. As such you get told off when you try to run yarn

$ bin/yarn resourcemanager
Error: JAVA_HOME is not set.

To make things more interesting, if you set the value in the shell, it still doesn't propagate down to the scripts

$ echo $JAVA_HOME

$ source libexec/hadoop-config.sh 
$ echo $JAVA_HOME
/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
$ bin/yarn resourcemanager
Error: JAVA_HOME is not set.
$echo $JAVA_HOME
/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home

Issue Links

• Is contained by: HADOOP-9902 Shell script rewrite
• is related to: HADOOP-7894 bin and sbin commands don't use JAVA_HOME when run from the tarball