Shen Yinjie created AMBARI-24190:
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Summary: HADOOP_CLASSPATH should always put HADOOP_CONFIG_DIR first
Key: AMBARI-24190
URL: https://issues.apache.org/jira/browse/AMBARI-24190
Project: Ambari
Issue Type: Bug
Reporter: Shen Yinjie
Currently,in hadoop-env.xml template,
{code}MAPREDUCE_LIBS=/usr/lib/hadoop-mapreduce/*
export HADOOP_CLASSPATH=${HADOOP_CLASSPATH}${JAVA_JDBC_LIBS}:${MAPREDUCE_LIBS}
if [ -d "/usr/lib/tez" ]; then
export
HADOOP_CLASSPATH=$HADOOP_CLASSPATH:/usr/lib/tez/*:/usr/lib/tez/lib/*:/etc/tez/conf
fi
{code}
In a scenario when a hadoop client uses hadoop shell and sets
HADOOP_USER_CLASSPATH_FIRST , since HADOOP_CLASSPATH contains
MAPREDUCE_LIBS,which has a core-site.xml in
hadoop-mapreduce-client-jobclient-xx-tests.jar. This could pollute job runtime
environment.
So, we should put HADOOP_CONFIG_DIR always in front of HADOOP_CLASSPATH.
I found that in Hadoop 3.0,this has already been done in hadoop-functions.sh.
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