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https://issues.apache.org/jira/browse/LUCENE-5526?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand closed LUCENE-5526.
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Resolution: Not a Problem
Agreed, I guess this is not needed anymore since the merge policy can be
changed on a live index.
> Forced merges
> -------------
>
> Key: LUCENE-5526
> URL: https://issues.apache.org/jira/browse/LUCENE-5526
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Priority: Minor
>
> {{IndexWriter.forceMerge}} allows to force merges if the number of segments
> is higher than a configured limit. I would like to have the ability to also
> force a merge if there is a single segment in the directory. This is possible
> today by closing the IndexWriter, reopening with a custom merge policy such
> as {{UpgradeIndexMergePolicy}}, running a {{forceMerge}} and finally
> reopening again with the original merge policy but this is a bit impractical
> and if possible I would like to be able to do it without reopening the writer
> twice.
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