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https://issues.apache.org/jira/browse/LUCENE-1432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12643959#action_12643959
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Wouter Heijke commented on LUCENE-1432:
---------------------------------------
Yes, the application calls bits() somewhere. I had just changed bits() into
getDocIdSet() before your comment so this was the right thing to do, at least
to fix the problem for now. Thanks!
> 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
>
> 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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