Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/9214#discussion_r43960203
--- Diff:
core/src/main/java/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriter.java
---
@@ -155,10 +170,16 @@ public void write(Iterator<Product2<K, V>> records)
throws IOException {
writer.commitAndClose();
}
- partitionLengths =
- writePartitionedFile(shuffleBlockResolver.getDataFile(shuffleId,
mapId));
- shuffleBlockResolver.writeIndexFile(shuffleId, mapId,
partitionLengths);
+ final File tmpDataFile =
blockManager.diskBlockManager().createTempShuffleBlock()._2();
+
+ partitionLengths = writePartitionedFile(tmpDataFile);
--- End diff --
If compression is employed, then each region of the single "partitioned"
file is compressed separately. So the concatenation here should be correct.
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