Github user MaxGekk commented on a diff in the pull request:
https://github.com/apache/spark/pull/22233#discussion_r213252905
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/ddl.scala ---
@@ -671,7 +674,7 @@ case class AlterTableRecoverPartitionsCommand(
val value = ExternalCatalogUtils.unescapePathName(ps(1))
if (resolver(columnName, partitionNames.head)) {
scanPartitions(spark, fs, filter, st.getPath, spec ++
Map(partitionNames.head -> value),
- partitionNames.drop(1), threshold, resolver)
+ partitionNames.drop(1), threshold, resolver,
listFilesInParallel = false)
--- End diff --
@kiszk Right, all `Future`s do the same - trying to execute another
`Future` on the same fixed thread pool.
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