[GitHub] [spark] dongjoon-hyun commented on a change in pull request #30110: [SPARK-33198][CORE] getMigrationBlocks should not fail at missing files

[GitBox <gi...@apache.org>]

dongjoon-hyun commented on a change in pull request #30110:
URL: https://github.com/apache/spark/pull/30110#discussion_r508817855



##########
File path: core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala
##########
@@ -241,14 +241,16 @@ private[spark] class IndexShuffleBlockResolver(
       val dataBlockData = new FileSegmentManagedBuffer(
         transportConf, dataFile, 0, dataFile.length())
 
-      // Make sure the files exist
-      assert(indexFile.exists() && dataFile.exists())
+      // Make sure the index exist.
+      if (!indexFile.exists()) {
+        throw new FileNotFoundException("Index file is deleted already.")
+      }
 
       List((indexBlockId, indexBlockData), (dataBlockId, dataBlockData))

Review comment:
       Sure!




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