Github user StephanEwen commented on the pull request:
https://github.com/apache/flink/pull/1067#issuecomment-135983916
Ah, that makes perfect sense. The last memory segment is not fully used
(only until the hash index has initialized enough buckets). The bloom filter
initialization loops should also skip those last buckets.
Since the memory for these buckets is not initialized, their contents (like
count) is undefined.
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