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LUCENE-8221: MoreLikeThis.setMaxDocFreqPct can easily int-overflow on larger indexes.

This commit is contained in:
Dawid Weiss 2018-05-25 12:16:22 +02:00
parent 41ecad9897
commit 719fce8026
2 changed files with 8 additions and 3 deletions
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3
lucene/CHANGES.txt
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@ -202,6 +202,9 @@ New Features
Bug Fixes
* LUCENE-8221: MoreLikeThis.setMaxDocFreqPct can easily int-overflow on larger
indexes.
* LUCENE-8266: Detect bogus tiles when creating a standard polygon and
throw a TileException. (Ignacio Vera)

8
lucene/queries/src/java/org/apache/lucene/queries/mlt/MoreLikeThis.java
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@ -418,14 +418,16 @@ public final class MoreLikeThis {
* Set the maximum percentage in which words may still appear. Words that appear
* in more than this many percent of all docs will be ignored.
*
* This method calls {@link #setMaxDocFreq(int)} internally (both conditions cannot
* be used at the same time).
*
* @param maxPercentage the maximum percentage of documents (0-100) that a term may appear
* in to be still considered relevant
* in to be still considered relevant.
*/
public void setMaxDocFreqPct(int maxPercentage) {
this.maxDocFreq = maxPercentage * ir.numDocs() / 100;
setMaxDocFreq(Math.toIntExact((long) maxPercentage * ir.numDocs() / 100));
}
/**
* Returns whether to boost terms in query based on "score" or not. The default is
* {@link #DEFAULT_BOOST}.