[GitHub] wangyum opened a new pull request #23922: [SPARK-25689][FOLLOW-UP][CORE] Get proxy user's delegation tokens

[GitBox <gi...@apache.org>]

wangyum opened a new pull request #23922: [SPARK-25689][FOLLOW-UP][CORE] Get proxy user's delegation tokens
URL: https://github.com/apache/spark/pull/23922
 
 
   ## What changes were proposed in this pull request?
   
   This pr makes it get proxy user's delegation token, otherwise throws `AccessControlException`:
   ```java
   org.apache.hadoop.security.AccessControlException: Client cannot authenticate via:[TOKEN, KERBEROS]
   ...
   at org.apache.spark.scheduler.cluster.YarnClientSchedulerBackend.waitForApplication(YarnClientSchedulerBackend.scala:95)
   at org.apache.spark.scheduler.cluster.YarnClientSchedulerBackend.start(YarnClientSchedulerBackend.scala:62)
   at org.apache.spark.scheduler.TaskSchedulerImpl.start(TaskSchedulerImpl.scala:185)
   ```
   How to reproduce this issue:
   ```shell
   $ ssh user_adm@spark-getaway-host1
   $ export HADOOP_PROXY_USER=user_a
   $ spark-sql --master yarn
   ```
   
   
   ## How was this patch tested?
   
   Test on our production environment.
   

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