hadoop-config.sh shouldn't add tools.jar to the classpath
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Key: HADOOP-7374
URL: https://issues.apache.org/jira/browse/HADOOP-7374
Project: Hadoop Common
Issue Type: Improvement
Components: scripts
Reporter: Eli Collins
Assignee: Eli Collins
bin/hadoop-config.sh (and bin/rcc) add lib/tools.jar from JAVA_HOME to the
classpath. This has been there since the initial commit of bin/hadoop, but I
don't think it's needed. *Executing* Hadoop does not depend on tools.jar (or
other libraries only available in the JDK, not the JRE) so let's not
automatically add it. Marking this as an incompatible change since a job could
potentially have relied on Hadoop adding tools.jar to the CLASSPATH
automatically (though such a job would not have run on a system that did not
have JAVA_HOME point to a jdk). The build of course still requires a JDK.
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