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Posted to dev@lucene.apache.org by "Adrien Grand (JIRA)" <ji...@apache.org> on 2014/02/28 13:45:19 UTC

[jira] [Created] (LUCENE-5481) IndexWriter.forceMerge may run unneeded merges

Adrien Grand created LUCENE-5481:
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             Summary: IndexWriter.forceMerge may run unneeded merges
                 Key: LUCENE-5481
                 URL: https://issues.apache.org/jira/browse/LUCENE-5481
             Project: Lucene - Core
          Issue Type: Bug
            Reporter: Adrien Grand
            Assignee: Adrien Grand
            Priority: Minor
             Fix For: 4.8


I was running some tests and was surprised that {{IndexWriter.forceMerge}} caused the index to be merged even when the index contains a single segment with no deletions.

This is due to {{MergePolicy.isMerged}} which always returns false with the default configuration although merge policies rely on it to know whether a single-segment index should be merged.



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