Mailing List Archive: ArrayIndexOutOfBoundsException in QueryParser

I don't know if this has occurred on this mailing list before; but to
be sure, here it is.

I dont know what the query was, but someone managed to trick the
parser into the following exeception :

java.lang.ArrayIndexOutOfBoundsException: -1 < 0
at java.util.Vector.elementAt(Vector.java:427)
at org.apache.lucene.queryParser.QueryParser.addClause(Unknown Source)
at org.apache.lucene.queryParser.QueryParser.Query(Unknown Source)
at org.apache.lucene.queryParser.QueryParser.parse(Unknown Source)
at org.apache.lucene.queryParser.QueryParser.parse(Unknown Source)
at
com.polopoly.search.lucene.LuceneIndexSearcher.search(LuceneIndexSearcher.java:294)

As far as I can see, it has to be here:

if (conj == CONJ_AND) {
BooleanClause c = (BooleanClause) clauses.elementAt(clauses.size()-1);
if (!c.prohibited)
c.required = true;
}

So, obviously, addClause() is called with an empty "clauses" Vector
and "conj" set to CONJ_AND.

Should not be possible, should it?

/Stefan B

--
---------------------------
Stefan Bergstrand
Polopoly - Cultivating the information garden
Ph: +46 8 506 782 67
Cell: +46 704 47 82 67
Fax: +46 8 506 782 51
stefan.bergstrand@polopoly.com, http://www.polopoly.com

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I think this is already listed as a bug. It occurs when one of the
terms is a stop word or some such, I think.

Otis

--- Stefan Bergstrand <stefan.bergstrand@polopoly.com> wrote:
>
> I don't know if this has occurred on this mailing list before; but to
> be sure, here it is.
>
>
> I dont know what the query was, but someone managed to trick the
> parser into the following exeception :
>
>
> java.lang.ArrayIndexOutOfBoundsException: -1 < 0
> at java.util.Vector.elementAt(Vector.java:427)
> at
> org.apache.lucene.queryParser.QueryParser.addClause(Unknown Source)
> at org.apache.lucene.queryParser.QueryParser.Query(Unknown
> Source)
> at org.apache.lucene.queryParser.QueryParser.parse(Unknown
> Source)
> at org.apache.lucene.queryParser.QueryParser.parse(Unknown
> Source)
> at
>
com.polopoly.search.lucene.LuceneIndexSearcher.search(LuceneIndexSearcher.java:294)
>
>
> As far as I can see, it has to be here:
>
> if (conj == CONJ_AND) {
> BooleanClause c = (BooleanClause)
> clauses.elementAt(clauses.size()-1);
> if (!c.prohibited)
> c.required = true;
> }
>
>
> So, obviously, addClause() is called with an empty "clauses" Vector
> and "conj" set to CONJ_AND.
>
>
> Should not be possible, should it?
>
> /Stefan B
>
>
> --
> ---------------------------
> Stefan Bergstrand
> Polopoly - Cultivating the information garden
> Ph: +46 8 506 782 67
> Cell: +46 704 47 82 67
> Fax: +46 8 506 782 51
> stefan.bergstrand@polopoly.com, http://www.polopoly.com
>
> --
> To unsubscribe, e-mail:
> <mailto:lucene-dev-unsubscribe@jakarta.apache.org>
> For additional commands, e-mail:
> <mailto:lucene-dev-help@jakarta.apache.org>
>

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