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From "Doron Cohen (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-504) FuzzyQuery produces a "java.lang.NegativeArraySizeException" in PriorityQueue.initialize if I use Integer.MAX_VALUE as BooleanQuery.MaxClauseCount
Date Mon, 12 Jun 2006 02:08:30 GMT
    [ http://issues.apache.org/jira/browse/LUCENE-504?page=comments#action_12415800 ] 

Doron Cohen commented on LUCENE-504:
------------------------------------

LuceneFAQ item    "Why am I getting a TooManyClauses exception?"   
suggests:    "use BooleanQuery.setMaxClauseCount(Integer.MAX_VALUE)". 

This would cause PriorityQueue to create an array of size maxint:
  - SUN JRE throws an out-of-memory error.
  - IBM JRE throws a "too large allocation" runtime error.

Seems that at least two fixes are required:
  + BooleanQuery - hard limit on value of maxClauseCount
  + PriorityQueue - hard limit on size of queue, since it is stored in memory.

The attached would set 1,000,000 hard limit - defined in PriorityQueu  - I think the most
intensive use of
priority queue is for docs/hits during search, and 1M docs seems sufficient, unless there
are uses that I am not aware of.


> FuzzyQuery produces a "java.lang.NegativeArraySizeException" in PriorityQueue.initialize
if I use Integer.MAX_VALUE as BooleanQuery.MaxClauseCount
> --------------------------------------------------------------------------------------------------------------------------------------------------
>
>          Key: LUCENE-504
>          URL: http://issues.apache.org/jira/browse/LUCENE-504
>      Project: Lucene - Java
>         Type: Bug

>   Components: Search
>     Versions: 1.9
>     Reporter: Joerg Henss
>     Priority: Minor
>  Attachments: TestFuzzyQueryError.java
>
> PriorityQueue creates an "java.lang.NegativeArraySizeException" when initialized with
Integer.MAX_VALUE, because Integer overflows. I think this could be a general problem with
PriorityQueue. The Error occured when I set BooleanQuery.MaxClauseCount to Integer.MAX_VALUE
and user a FuzzyQuery for searching.

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