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From "Michael McCandless (JIRA)" <>
Subject [jira] Commented: (LUCENE-1651) Make always return MSR to simplify (re-)opens.
Date Thu, 21 May 2009 16:05:45 GMT


Michael McCandless commented on LUCENE-1651:

Excellent!  Thanks Earwin.

bq. 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?

Yes, please make mods to the tags/XXX checkout, and include those mods in the patch.

> 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
>            Assignee: Michael McCandless
>         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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