Github user jerryshao commented on a diff in the pull request:
https://github.com/apache/spark/pull/18329#discussion_r123417606
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/streaming/DataStreamWriter.scala
---
@@ -235,6 +237,21 @@ final class DataStreamWriter[T] private[sql](ds:
Dataset[T]) {
"write files of Hive data source directly.")
}
+ val hadoopConf = df.sparkSession.sessionState.newHadoopConf()
+ val defaultFS = FileSystem.getDefaultUri(hadoopConf).getScheme
+ val tmpFS = new URI(System.getProperty("java.io.tmpdir")).getScheme
+
+ val isTempCheckpointLocationAvailable = tmpFS match {
+ case null | "file" =>
+ if (defaultFS == null || defaultFS.equals("file")) {
+ true
+ } else {
+ false
+ }
+ case defaultFS => true
--- End diff --
@mgaido91 , if defaultFS is HDFS, in which scenario `tmpFS`
("java.io.tmpdir") be the same as `defaultFS`? From my understanding, unless we
change "java.io.tmpdir" property, then `tmpFs` will always be local FS.
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