ulysses-you commented on code in PR #38747:
URL: https://github.com/apache/spark/pull/38747#discussion_r1028738643
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sql/core/src/main/scala/org/apache/spark/sql/execution/SQLExecution.scala:
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@@ -121,7 +121,11 @@ object SQLExecution {
SparkThrowableHelper.getMessage(e)
}
val event = SparkListenerSQLExecutionEnd(
- executionId, System.currentTimeMillis(), errorMessage)
+ executionId,
+ System.currentTimeMillis(),
+ // Use empty string to indicate no error, as None may mean events
generated by old
+ // versions of Spark.
+ errorMessage.orElse(Some("")))
Review Comment:
Better to add docs at `SparkListenerSQLExecutionEnd`, `Some("")` is not an
error. Otherwise developers may confuse.
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