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https://issues.apache.org/jira/browse/LUCENE-8394?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16538174#comment-16538174
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ASF subversion and git services commented on LUCENE-8394:
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Commit a864ef823167380eb1e2724b453c7730b93f5bbe in lucene-solr's branch
refs/heads/master from [~jpountz]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=a864ef8 ]
LUCENE-8394: Explicitly handle the case when segments are smaller than the
floor size.
> TieredMergePolicy's handling of the case that all segments are less than the
> floor segment size is fragile
> ----------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-8394
> URL: https://issues.apache.org/jira/browse/LUCENE-8394
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Priority: Minor
> Attachments: LUCENE-8394.patch
>
>
> In the case that the index size is less than the floor segment size, the
> allowed number of segments is always computed as 1. In practice, it doesn't
> keep merging indefinitely only because {{doFindMerges}} has some logic that
> skips merging if the number of candidates is less than maxMergeAtOnce. This
> looks a bit fragile to me.
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