Dawid Weiss created LUCENE-8221:
-----------------------------------
Summary: MoreLikeThis.setMaxDocFreqPct can easily int-overflow on
larger indexes
Key: LUCENE-8221
URL: https://issues.apache.org/jira/browse/LUCENE-8221
Project: Lucene - Core
Issue Type: Bug
Reporter: Dawid Weiss
Assignee: Dawid Weiss
{code}
public void setMaxDocFreqPct(int maxPercentage) {
this.maxDocFreq = maxPercentage * ir.numDocs() / 100;
}
{code}
The above overflows integer range into negative numbers on even fairly small
indexes (for maxPercentage = 75, it happens for just over 28 million documents.
We should make the computations on long range so that it doesn't overflow and
have a more strict argument validation.
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