George Rhoten created LUCENE-5112:
-------------------------------------
Summary: FilteringTokenFilter is double incrementing the position
increment in incrementToken
Key: LUCENE-5112
URL: https://issues.apache.org/jira/browse/LUCENE-5112
Project: Lucene - Core
Issue Type: Bug
Components: modules/analysis
Affects Versions: 4.0
Reporter: George Rhoten
The following code from FilteringTokenFilter#incrementToken() seems wrong.
{noformat}
if (enablePositionIncrements) {
int skippedPositions = 0;
while (input.incrementToken()) {
if (accept()) {
if (skippedPositions != 0) {
posIncrAtt.setPositionIncrement(posIncrAtt.getPositionIncrement() +
skippedPositions);
}
return true;
}
skippedPositions += posIncrAtt.getPositionIncrement();
}
} else {
{noformat}
The skippedPositions variable should probably be incremented by 1 instead of
posIncrAtt.getPositionIncrement(). As it is, it seems to be double
incrementing, which is a problem if your data is full of stop words and your
position increment integer overflows.
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