[LUCENE-8049] IndexWriter.getMergingSegments should return a Set, not Collection

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 7.2
• Component/s: core/index
• Lucene Fields: New
• Assignee: David Smiley
• Reporter: David Smiley
• Created: 13/Nov/17 19:03
• Updated: 22/Dec/17 08:31
• Resolved: 27/Nov/17 04:33

Description

IndexWriter.getMergingSegments is called by the MergePolicy so that it can filter out segments to merge using mergingSegments.contains(seg). The implementation is a HashSet, thankfully but the declared type of this method ought to be defined as a Set as well.