dongjoon-hyun commented on a change in pull request #25197: [SPARK-21067][SQL]
Initialize the HdfsEncryptionShim and the underlying FileSystem(FS) e…
URL: https://github.com/apache/spark/pull/25197#discussion_r305454216
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File path:
sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveClientImpl.scala
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@@ -190,6 +190,13 @@ private[hive] class HiveClientImpl(
Hive.set(clientLoader.cachedHive.asInstanceOf[Hive])
}
SessionState.start(state)
+ // SPARK-21067: Initialize the HdfsEncryptionShim and the underlying
FileSystem(FS) eagerly.
+ // The underlying FS is cached and shared among sessions if the sessions
request for FS with
+ // the same schema, authority and ugi. If we don't do this, the
initialization of the FS will
+ // be delayed to when one session call `getHdfsEncryptionShim` explicitly.
However the FS is
+ // auto-closable, which would be closed when the session is closed. The
subsequent sessions use
+ // the same FS will throw "Filesystem closed Exception".
+ state.getHdfsEncryptionShim
Review comment:
Is this the right place for this? HDFS can be used without `hive` module.
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