[LUCENE-2812] IndexReader.indexExists sometimes returns true when an index isn't present

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.1, 4.0-ALPHA
• Component/s: core/index
• Lucene Fields: New
• Assignee: Michael McCandless
• Reporter: Michael McCandless
• Created: 13/Dec/10 15:38
• Updated: 28/Aug/22 12:37
• Resolved: 13/Dec/10 16:16

Description

If you open a writer on a new dir and prepareCommit but don't finish the commit, IndexReader.indexExists incorrectly returns true, because it just checks for whether a segments_N file is present and not whether it can be successfully read.