gatorsmile commented on a change in pull request #28904:
URL: https://github.com/apache/spark/pull/28904#discussion_r468305223
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/CompactibleFileStreamLog.scala
##########
@@ -173,37 +177,64 @@ abstract class CompactibleFileStreamLog[T <: AnyRef :
ClassTag](
override def purge(thresholdBatchId: Long): Unit = throw new
UnsupportedOperationException(
s"Cannot purge as it might break internal state.")
+ /**
+ * Apply function on all entries in the specific batch. The method will throw
+ * FileNotFoundException if the metadata log file doesn't exist.
+ *
+ * NOTE: This doesn't fail early on corruption. The caller should handle the
exception
+ * properly and make sure the logic is not affected by failing in the middle.
Review comment:
How to ensure all the callers handle it properly? Do we need to
introduce a test to cover it?
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