xianjingfeng commented on code in PR #2690:
URL: https://github.com/apache/uniffle/pull/2690#discussion_r2575957683
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server/src/main/java/org/apache/uniffle/server/block/PartitionedShuffleBlockIdManager.java:
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@@ -110,6 +110,10 @@ public byte[] getFinishedBlockIds(
Map<Integer, Roaring64NavigableMap> partitionToBlockId =
shuffleIdToPartitions.get(shuffleId);
+ if (partitionToBlockId == null) {
+ return RssUtils.serializeBitMap(Roaring64NavigableMap.bitmapOf());
Review Comment:
In our production environment, I found that if a stage has not shuffle data,
`partitionToBlockId` is null.
https://github.com/apache/uniffle/blob/8cb662524f7e215391dfb77edfefb0ade8faa745/client/src/main/java/org/apache/uniffle/client/impl/ShuffleWriteClientImpl.java#L767-L769
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