Mitch Wyle created HADOOP-9450:
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Summary: HADOOP_USER_CLASSPATH_FIRST is not honored; CLASSPATH is
PREpended instead of APpended
Key: HADOOP-9450
URL: https://issues.apache.org/jira/browse/HADOOP-9450
Project: Hadoop Common
Issue Type: Bug
Reporter: Mitch Wyle
On line 133 of the hadoop shell wrapper, CLASSPATH is set as:
CLASSPATH=${CLASSPATH}:${HADOOP_CLASSPATH}
Notice that the built-up CLASSPATH, along with all the libs and unwanted JARS
are pre-pended BEFORE the user's HADOOP_CLASSPATH. Therefore there is no way
to put your own JARs in front of those that the hadoop wrapper script sets.
We propose a patch that reverses this order. Failing that, we would like to
add a command line option to override this behavior and enable a user's JARs to
be found before the wrong ones in the Hadoop library paths.
We always welcome your opinions.
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