Github user vanzin commented on the issue:
https://github.com/apache/spark/pull/14492
@yhuai can you explain the use case you're trying to cover here with an
example?
`LAUNCH_CLASSPATH` is the classpath of the launcher process (the process
that creates the command line to then run the `SparkSubmit` class). The
launcher itself already adds `SPARK_DIST_CLASSPATH` to Spark's classpath:
https://github.com/apache/spark/blob/d6dc12ef0146ae409834c78737c116050961f350/launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java#L204
```
addToClassPath(cp, getenv("HADOOP_CONF_DIR"));
addToClassPath(cp, getenv("YARN_CONF_DIR"));
addToClassPath(cp, getenv("SPARK_DIST_CLASSPATH"));
```
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