[LUCENE-7581] IndexWriter#updateDocValues can break index sorting

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 6.4, 7.0
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: Jim Ferenczi
• Created: 05/Dec/16 13:49
• Updated: 28/Aug/22 15:07
• Resolved: 09/Dec/16 23:11

Description

IndexWriter#updateDocValues can break index sorting if it is called on a field that is used in the index sorting specification.
TestIndexSorting has a test for this case: #testConcurrentDVUpdates
but only L1 merge are checked. Any LN merge would fail the test because the inner sort of the segment is not re-compute during/after DV updates.