[jira] [Created] (AMBARI-24190) HADOOP_CLASSPATH should always put HADOOP_CONFIG_DIR first

["Shen Yinjie (JIRA)" <ji...@apache.org>]

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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