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From "Earwin Burrfoot (JIRA)" <>
Subject [jira] Updated: (LUCENE-1651) Make always return MSR to simplify (re-)opens.
Date Thu, 21 May 2009 15:59:45 GMT


Earwin Burrfoot updated LUCENE-1651:

    Attachment: LUCENE-1651.patch

Okay, here's the first patch, against latest trunk.
test-core, test-contrib pass. test-tag fails due to no-longer-correct test assumptions. Should
I checkout the branch and make a separate patch, or how is it done?

> Make always return MSR to simplify (re-)opens.
> -----------------------------------------------------------------
>                 Key: LUCENE-1651
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Task
>    Affects Versions: 2.9
>            Reporter: Earwin Burrfoot
>         Attachments: LUCENE-1651.patch
> As per discussion in mailing list, I'm making always return
MSR, even for single-segment indexes.
> While theoretically valid in the past (if you make sure to keep your index constantly
optimized) this feature is made practically obsolete by per-segment collection.
> The patch somewhat de-hairies (re-)open logic for MSR/SR.
> SR no longer needs an ability to pose as toplevel directory-owning IR.
> All related logic is moved from DIR to MSR.
> DIR becomes almost empty, and copying two or three remaining fields over to MSR/SR, I
remove it.
> Lots of tests fail, as they rely on SR returned from, I fix by introducing
SR.getOnlySegmentReader static package-private method.
> Some previous bugs are uncovered, one is fixed in LUCENE-1645, another (partially fixed
in LUCENE-1648) is fixed in this patch. 

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