cloud-fan commented on a change in pull request #24892: [SPARK-25341][Core]
Support rolling back a shuffle map stage and re-generate the shuffle files
URL: https://github.com/apache/spark/pull/24892#discussion_r295103463
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File path:
common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalShuffleBlockResolver.java
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@@ -295,19 +309,25 @@ private void deleteNonShuffleServiceServedFiles(String[]
dirs) {
* Sort-based shuffle data uses an index called
"shuffle_ShuffleId_MapId_0.index" into a data file
* called "shuffle_ShuffleId_MapId_0.data". This logic is from
IndexShuffleBlockResolver,
* and the block id format is from ShuffleDataBlockId and
ShuffleIndexBlockId.
+ * While the shuffle data and index file generated from the indeterminate
stage,
+ * the ShuffleDataBlockId and ShuffleIndexBlockId will be extended by the
stage attempt id.
*/
private ManagedBuffer getSortBasedShuffleBlockData(
- ExecutorShuffleInfo executor, int shuffleId, int mapId, int reduceId) {
+ ExecutorShuffleInfo executor, int shuffleId,
+ int mapId, int reduceId, int stageAttemptId) {
+ String baseFileName = "shuffle_" + shuffleId + "_" + mapId + "_0";
Review comment:
not related to your change, but do you know what `_0` means here?
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