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https://issues.apache.org/jira/browse/LUCENE-1657?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless resolved LUCENE-1657.
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Resolution: Fixed
> Make "boolean readOnly" a required arg to IndexReader.open
> ----------------------------------------------------------
>
> Key: LUCENE-1657
> URL: https://issues.apache.org/jira/browse/LUCENE-1657
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Priority: Minor
> Fix For: 2.9
>
> Attachments: LUCENE-1657.patch
>
>
> Most apps don't need read/write IndexReader, and, a readOnly
> IndexReader has better concurrent performance.
> I'd love to simply default readOnly to true, and you'd have to specify
> "false" if you want a read/write reader (I think that's the natural
> default), but I think that'd break too many back-compat cases.
> So the workaround is to make the parameter explicit, in 2.9.
> I think even for IndexSearcher's methods that open an IndexReader
> under the hood, we should also make the parameter explicit.
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