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Date: Thu, 30 Oct 2008 13:56:44 -0700 (PDT)
From: "Paul Elschot (JIRA)" <jira@apache.org>
To: java-dev@lucene.apache.org
Subject: [jira] Issue Comment Edited: (LUCENE-1432) BitSet cannot be cast to
 DocIdSet
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    [ https://issues.apache.org/jira/browse/LUCENE-1432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12644102#action_12644102 ] 

paul.elschot@xs4all.nl edited comment on LUCENE-1432 at 10/30/08 1:55 PM:
----------------------------------------------------------------

This patch should fix the problem.

However, the implementation of the bits() method is so inefficient that it might actually motivate users to avoid it.

The patch also contains a docIdSetToCache() method with the DocIdSet and the IndexReader as arguments, as discussed at LUCENE-1296.

      was (Author: paul.elschot@xs4all.nl):
    This patch should fix the problem.

However, the implementation of the bits() method is so inefficient that it might actually motivate users to avoid it.

The patch also contains a docIdSetToCache() method with the Filter and the IndexReader as arguments, as discussed at LUCENE-1296.
  
> BitSet cannot be cast to DocIdSet
> ---------------------------------
>
>                 Key: LUCENE-1432
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1432
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Search
>    Affects Versions: 2.4
>            Reporter: Wouter Heijke
>         Attachments: LUCENE-1432.patch
>
>
> We recently upgraded from Lucene 2.3.1 to 2.4.0.
> We left the code as-is apart from the needed changes to the package name for snowball, everything seems to run as before... Until yesterday when we started noticing the following stacktrace:
> java.lang.ClassCastException: java.util.BitSet cannot be cast to org.apache.lucene.search.DocIdSet
>         org.apache.lucene.search.CachingWrapperFilter.getDocIdSet(CachingWrapperFilter.java:76)
>         org.apache.lucene.misc.ChainedFilter.getDocIdSet(ChainedFilter.java:200)
>         org.apache.lucene.misc.ChainedFilter.getDocIdSet(ChainedFilter.java:145)
>         org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:140)
>         org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:112)
>         org.apache.lucene.search.Searcher.search(Searcher.java:136)
> Our index is 15gb in size and was made with Lucene 2.4.0.
> The index holds around 36 million (Lucene) documents and 268 million terms.

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