Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/11870#discussion_r57205642
--- Diff:
core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java ---
@@ -555,6 +574,31 @@ private Location with(Object base, long offset, int
length) {
}
/**
+ * Find the next pair that has the same key as current one.
+ */
+ public boolean next() {
+ pos = (pos + step++) & mask;
+ // Remember the current key
+ Object keyBase = getKeyBase();
+ long keyOffset = getKeyOffset();
+ int keyLength = getKeyLength();
+ assert (longArray != null);
+ while (longArray.get(pos * 2) != 0) {
--- End diff --
The same as we insert new key.
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