ankurdave commented on a change in pull request #29744:
URL: https://github.com/apache/spark/pull/29744#discussion_r487580646
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File path: core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
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@@ -816,6 +816,10 @@ public boolean append(Object kbase, long koff, int klen,
Object vbase, long voff
} catch (SparkOutOfMemoryError oom) {
canGrowArray = false;
}
+ } else if (numKeys >= growthThreshold && longArray.size() / 2 >=
MAX_CAPACITY) {
+ // The map needs to grow, but this would cause it to exceed
MAX_CAPACITY. Prevent the map
+ // from accepting any more new elements.
+ canGrowArray = false;
Review comment:
Hmm, perhaps the comment's wording is confusing. I intended to convey
that, if the map were to grow, then its capacity would exceed MAX_CAPACITY.
Therefore it cannot grow and we must prevent it from accepting any more new
elements.
I reworded the comment to clarify this.
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