Github user wangyum commented on the issue:
https://github.com/apache/spark/pull/21987
It seems that this change caused permission issue:
```
export HADOOP_PROXY_USER=user_a
spark-sql
```
It will create dir `/tmp/hive-$%7Buser.name%7D/user_a/`. then change to
other user:
```
export HADOOP_PROXY_USER=user_b
spark-sql
```
exception:
```scala
Exception in thread "main" java.lang.RuntimeException:
org.apache.hadoop.security.AccessControlException: Permission denied:
user=user_b, access=EXECUTE,
inode="/tmp/hive-$%7Buser.name%7D/user_b/6b446017-a880-4f23-a8d0-b62f37d3c413":user_a:hadoop:drwx------
at
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.check(FSPermissionChecker.java:319)
at
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkTraverse(FSPermissionChecker.java:259)
at
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:205)
at
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:190)
at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.checkPermission(FSDirectory.java:1780)
at
org.apache.hadoop.hdfs.server.namenode.FSDirStatAndListingOp.getFileInfo(FSDirStatAndListingOp.java:108)
```
I'll do verification later.
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