cloud-fan commented on a change in pull request #25620: [SPARK-25341][Core]
Support rolling back a shuffle map stage and re-generate the shuffle files
URL: https://github.com/apache/spark/pull/25620#discussion_r384922916
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File path:
common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalShuffleBlockResolver.java
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@@ -172,7 +172,7 @@ public ManagedBuffer getBlockData(
String appId,
String execId,
int shuffleId,
- int mapId,
+ long mapId,
Review comment:
previous the map id is the index of the mapper, and can get conflicts when
we re-run the task. Now the map id is the task id, which is unique. task id
needs to be long.
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