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https://issues.apache.org/jira/browse/LUCENE-2891?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12987058#action_12987058
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Michael McCandless commented on LUCENE-2891:
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-1 means "don't load terms index because I will never, ever seek-by-Term". As
far as I know, it's only segment merging that does this...
Maybe we shouldn't allow it for IR.open? Though, eg if you want to pass the
reader to addIndexes (say), opening with -1 should work...
> IndexWriterConfig does not allow termInfosDivisor to be -1, while the latest
> indicates TermInfos should not be loaded
> ---------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-2891
> URL: https://issues.apache.org/jira/browse/LUCENE-2891
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index
> Reporter: Shai Erera
> Assignee: Shai Erera
> Fix For: 3.1, 4.0
>
> Attachments: LUCENE-2891.patch
>
>
> While you can pass -1 to IR.open(), and it's documented, you cannot do the
> same for IndexWriter's readers (b/c IWC blocks it). Need to allow this
> setting as well as add support for it in our tests, e.g. we should randomly
> set it to -1. Robert also suggested RandomIW use -1 randomly when it opens
> readers.
> I'll work on a patch
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