dongjoon-hyun commented on a change in pull request #30141:
URL: https://github.com/apache/spark/pull/30141#discussion_r510985437
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FileFormatWriter.scala
##########
@@ -164,6 +164,10 @@ object FileFormatWriter extends Logging {
SQLExecution.checkSQLExecutionId(sparkSession)
+ // propagate the decription UUID into the jobs, so that committers
+ // get an ID guaranteed to be unique.
+ job.getConfiguration.set("spark.sql.sources.writeJobUUID",
description.uuid)
Review comment:
Do you mean Apache Hadoop S3A committer use this?
`spark.sql.sources.writeJobUUID` is not used inside Spark 3.x/2.x code base.
In Spark 1.6, it was a part of file name.
```scala
val uniqueWriteJobId = conf.get("spark.sql.sources.writeJobUUID")
...
val filename = f"part-r-$partition%05d-$uniqueWriteJobId.orc"
```
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