Github user yaooqinn commented on the issue:
https://github.com/apache/spark/pull/18666
@gatorsmile would you plz take a look at this.
this pr mainly want to close HiveSessionState explicitly to delete
`hive.downloaded.resources.dir` which points to `"${system:java.io.tmpdir}" +
File.separator + "${hive.session.id}_resources"` by default
`hive.exec.local.scratchdir` which points to `"${system:java.io.tmpdir}" +
File.separator + "${system:user.name}"` by default and some other dirs which
used only for hive but without deleting hook on shutdown.
the below code is how HiveSessionState create
`hive.downloaded.resources.dir`, `isCleanUp` is set to `false`.
```scala
// 3. Download resources dir
path = new Path(HiveConf.getVar(conf,
HiveConf.ConfVars.DOWNLOADED_RESOURCES_DIR));
createPath(conf, path, scratchDirPermission, true, **isCleanUp** = false);
````
Plenty of unused dirs left after submit a lot of Hive supported spark
applications.
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