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_r319495883
##########
File path:
common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalBlockHandler.java
##########
@@ -106,7 +106,7 @@ protected void handleMessage(
numBlockIds += ids.length;
}
streamId = streamManager.registerStream(client.getClientId(),
- new ManagedBufferIterator(msg, numBlockIds), client.getChannel());
+ new ShuffleManagedBufferIterator(msg), client.getChannel());
Review comment:
we can also remove
```
numBlockIds = 0;
for (int[] ids: msg.reduceIds) {
numBlockIds += ids.length;
}
```
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