rmetzger commented on a change in pull request #14390:
URL: https://github.com/apache/flink/pull/14390#discussion_r544231381
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File path: flink-core/src/main/java/org/apache/flink/util/CollectionUtil.java
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@@ -75,6 +75,7 @@ public static boolean isNullOrEmpty(Map<?, ?> map) {
for (T element : elements) {
int bucket = index % numBuckets;
buckets.computeIfAbsent(bucket, key -> new
ArrayList<>(initialCapacity)).add(element);
+ index++;
Review comment:
@sjwiesman Can you take care of adding a unit test?
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