[LUCENE-9722] Aborted merge can leak readers if the output is empty

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 9.0, 8.8
• Fix Version/s: 9.0, 8.9, 8.8.1
• Component/s: core/index
• Lucene Fields: New
• Assignee: Nhat Nguyen
• Reporter: Nhat Nguyen
• Created: 02/Feb/21 01:17
• Updated: 28/Aug/22 16:14
• Resolved: 02/Feb/21 17:49

Description

We fail to close the merged readers of an aborted merge if its output segment contains no document.

This bug was discovered by a test in Elasticsearch (elastic/elasticsearch#67884).

Issue Links

• links to: GitHub Pull Request #2288