Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/19222#discussion_r175868832
--- Diff:
common/unsafe/src/main/java/org/apache/spark/unsafe/array/LongArray.java ---
@@ -80,7 +76,7 @@ public void zeroOut() {
public void set(int index, long value) {
assert index >= 0 : "index (" + index + ") should >= 0";
assert index < length : "index (" + index + ") should < length (" +
length + ")";
- Platform.putLong(baseObj, baseOffset + index * WIDTH, value);
+ memory.putLong(memory.getBaseOffset() + index * WIDTH, value);
--- End diff --
the problem is that, the semantic of the offset argument is pretty
important to the `MemoryBlock` component. If we don't do it right at the first
version, we bring a bad history to `MemoryBlock`, which may confuse other
people.
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