Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/4610#discussion_r26726099
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/json/JSONRelation.scala ---
@@ -66,9 +66,21 @@ private[sql] class DefaultSource
mode match {
case SaveMode.Append =>
sys.error(s"Append mode is not supported by
${this.getClass.getCanonicalName}")
- case SaveMode.Overwrite =>
- fs.delete(filesystemPath, true)
+ case SaveMode.Overwrite => {
+ try {
+ if (!fs.delete(filesystemPath, true)) {
+ throw new IOException(
+ s"Unable to clear output directory
${filesystemPath.toString} prior"
+ + s" to INSERT OVERWRITE a JSON table:\n")
+ }
+ } catch {
+ case e: IOException =>
+ throw new IOException(
+ s"Unable to clear output directory
${filesystemPath.toString} prior"
+ + s" to INSERT OVERWRITE a JSON table:\n${e.toString}")
--- End diff --
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