yarn APPLICATION_CLASSPATH needs to be overridable
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Key: MAPREDUCE-3505
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3505
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mrv2
Affects Versions: 0.23.0, 0.23.1
Reporter: Bruno Mahé
Right now MRApps sets the classpath to just being mrapp-generated-classpath,
its content and a hardcoded list of directories.
If I understand correctly mrapp-generated-classpath is only there for testing
and may change or disappear at any time
The list of hardcoded directories is defined in
hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/ApplicationConstants.java
at line 92.
For convenience, here is its current content:
{quote}
/**
* Classpath for typical applications.
*/
public static final String[] APPLICATION_CLASSPATH =
new String[] {
"$HADOOP_CONF_DIR",
"$HADOOP_COMMON_HOME/share/hadoop/common/*",
"$HADOOP_COMMON_HOME/share/hadoop/common/lib/*",
"$HADOOP_HDFS_HOME/share/hadoop/hdfs/*",
"$HADOOP_HDFS_HOME/share/hadoop/hdfs/lib/*",
"$YARN_HOME/modules/*",
"$YARN_HOME/lib/*"
};
{quote}
Not all deployment scenarii fit in this layout and therefore we need a
standardized way to customize this class path.
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