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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