Github user weiqingy commented on a diff in the pull request:
https://github.com/apache/spark/pull/17989#discussion_r116631706
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveWriterContainers.scala ---
@@ -70,8 +70,11 @@ private[hive] class SparkHiveWriterContainer(
@transient protected lazy val committer = conf.value.getOutputCommitter
@transient protected lazy val jobContext = newJobContext(conf.value,
jID.value)
@transient private lazy val taskContext =
newTaskAttemptContext(conf.value, taID.value)
- @transient private lazy val outputFormat =
- conf.value.getOutputFormat.asInstanceOf[HiveOutputFormat[AnyRef,
Writable]]
+ @transient private lazy val outputFormat = conf.value.getOutputFormat
match {
--- End diff --
outputFormat is only used in `[Utilities.getFileExtension(conf.value,
fileSinkConf.getCompressed,
outputFormat)](https://github.com/weiqingy/spark/blob/0fa2bb791d1fa9c37fe89c1942ce0ed950a9ee59/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveWriterContainers.scala#L96)`
to get the file extension. If `outputFormat` is "null", the extension will be
"".
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