GitHub user dongjoon-hyun opened a pull request: https://github.com/apache/spark/pull/19477
[SPARK-22258][SQL] Writing empty dataset fails with ORC format ## What changes were proposed in this pull request? Since [SPARK-8501](https://issues.apache.org/jira/browse/SPARK-8501), Spark doesn't create an ORC file for empty data sets. However, [SPARK-21669](https://issues.apache.org/jira/browse/SPARK-21669) is trying to get the length of the written file at the end of writing tasks and fails with `FileNotFoundException`. This is a regression at 2.3.0 only. We had better fix this and have a test case to prevent future regression. ```scala scala> Seq("str").toDS.limit(0).write.format("orc").save("/tmp/a") 17/10/11 19:28:59 ERROR Utils: Aborting task java.io.FileNotFoundException: File file:/tmp/a/_temporary/0/_temporary/attempt_20171011192859_0000_m_000000_0/part-00000-aa56c3cf-ec35-48f1-bb73-23ad1480e917-c000.snappy.orc does not exist at org.apache.hadoop.fs.RawLocalFileSystem.deprecatedGetFileStatus(RawLocalFileSystem.java:611) at org.apache.hadoop.fs.RawLocalFileSystem.getFileLinkStatusInternal(RawLocalFileSystem.java:824) at org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:601) at org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:421) at org.apache.spark.sql.execution.datasources.BasicWriteTaskStatsTracker.getFileSize(BasicWriteStatsTracker.scala:60) ``` ## How was this patch tested? Pass the newly added test cases. You can merge this pull request into a Git repository by running: $ git pull https://github.com/dongjoon-hyun/spark SPARK-22258 Alternatively you can review and apply these changes as the patch at: https://github.com/apache/spark/pull/19477.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #19477 ---- commit b545f281b19120cc2c9e4197cae4b1315969247d Author: Dongjoon Hyun <dongj...@apache.org> Date: 2017-10-12T02:38:51Z [SPARK-22258][SQL] Writing empty dataset fails with ORC format ---- --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org