[AMBARI-6617] Hadoop Config shell script sets wrong environment if had previous hadoop path

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.6.0
• Component/s: ambari-server, ambari-web
• Labels: classnotfoundexception environment hadoop shellscript

Environment

RHEL6

• Assignee: Unassigned
• Reporter: Yixiao
• Created: 25/Jul/14 15:57
• Updated: 25/Jul/14 15:57

Description

I have previously installed Hadoop and had HADOOP_PREFIX, HADOOP_CONF_DIR in my environment.
The hadoop-layout.sh and hadoop-config.sh was unable to set the hadoop environment correctly. It will give error "class not found" error when trying to start the HDFS service.

To reproduce this error: ("/tmp" is some path other than the Hadoop path)
$ export HADOOP_PREFIX=/tmp
$ export HADOOP_CONF_DIR=/tmp
$ source /usr/lib/hadoop/libexec/hadoop-config.sh
$ hadoop version
It will fail with class not found error.

Fix: unset any HADOOP related variable at the beginning of "hadoop-config.sh"