Github user steveloughran commented on a diff in the pull request:
https://github.com/apache/spark/pull/19404#discussion_r183480609
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/HDFSMetadataLog.scala
---
@@ -123,6 +123,7 @@ class HDFSMetadataLog[T <: AnyRef :
ClassTag](sparkSession: SparkSession, path:
serialize(metadata, output)
return Some(tempPath)
} finally {
+ output.hflush()
--- End diff --
not needed, close will do it.
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