maropu commented on a change in pull request #27690:
URL: https://github.com/apache/spark/pull/27690#discussion_r455782283
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File path:
sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/SaveAsHiveFile.scala
##########
@@ -97,12 +99,46 @@ private[hive] trait SaveAsHiveFile extends
DataWritingCommand {
options = Map.empty)
}
- protected def getExternalTmpPath(
+ // Mostly copied from Context.java#getMRTmpPath of Hive 2.3.
+ // Visible for testing.
+ private[execution] def getNonBlobTmpPath(
+ hadoopConf: Configuration,
+ sessionScratchDir: String,
+ scratchDir: String): Path = {
+
+ // Hive's getMRTmpPath uses nonLocalScratchPath + '-mr-10000',
+ // which is ruled by 'hive.exec.scratchdir' including file system.
+ // This is the same as Spark's #oldVersionExternalTempPath.
+ // Only difference between #oldVersionExternalTempPath and Hive 2.3.0's is
HIVE-7090.
+ // HIVE-7090 added user_name/session_id on top of 'hive.exec.scratchdir'
+ // Here it uses session_path unless it's emtpy, otherwise uses scratchDir.
+ val sessionPath = if (!sessionScratchDir.isEmpty) sessionScratchDir else
scratchDir
+ val mrScratchDir = oldVersionExternalTempPath(new Path(sessionPath),
hadoopConf, sessionPath)
+ logDebug(s"MR scratch dir '$mrScratchDir/-mr-10000' is used")
+ val path = new Path(mrScratchDir, "-mr-10000")
+ val scheme = Option(path.toUri.getScheme).getOrElse("")
+ if (scheme.equals("file")) {
+ logWarning(s"Temporary data will be written into a local file system " +
+ s"(scheme: '$scheme', path: '$mrScratchDir'). If your Spark is not in
local mode, " +
+ s"you might need to configure 'hive.exec.scratchdir' " +
+ s"to use accessible file system (e.g. HDFS path) from any executors in
the cluster.")
Review comment:
nit: please remove the unnecessary `s` in the head?
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