Github user lw-lin commented on a diff in the pull request:
https://github.com/apache/spark/pull/17120#discussion_r105097597
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/FileStreamSource.scala
---
@@ -79,9 +81,16 @@ class FileStreamSource(
sourceOptions.maxFileAgeMs
}
+ private val fileNameOnly = sourceOptions.fileNameOnly
+ if (fileNameOnly) {
+ logWarning("'fileNameOnly' is enabled. Make sure your file names are
unique (e.g. using " +
+ "UUID), otherwise, files using the same name will be considered as
the same file and causes" +
+ " data lost")
--- End diff --
fixed -- thank you!
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