Github user jerryshao commented on a diff in the pull request:
https://github.com/apache/spark/pull/18616#discussion_r127317541
--- Diff:
core/src/main/scala/org/apache/spark/deploy/security/HadoopDelegationTokenManager.scala
---
@@ -42,7 +42,7 @@ import org.apache.spark.internal.Logging
private[spark] class HadoopDelegationTokenManager(
sparkConf: SparkConf,
hadoopConf: Configuration,
- fileSystems: Set[FileSystem])
+ fileSystems: () => Set[FileSystem])
--- End diff --
I think this issue is only happened when getting delegation tokens, which
requires kerberos logged UGI, not token auth-ed UGI. For normal HDFS
operations, token auth-ed UGI should be enough. That's why the issue is only
happened when getting new tokens from HDFS.
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