[COUCHDB-3028] Should hold db opened for compact/recompact switch

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Assignee: Unassigned
• Reporter: Ilya Khlopotov
• Created: 02/Jun/16 17:19
• Updated: 09/Jun/16 18:19
• Resolved: 09/Jun/16 18:19

Description

couch_index_compactor doesn't hold the underlying DB shard open (e.g., via couch_db:open/2) during the switch from the compaction phase to the recompaction phase. This opens up a window during which the DB can be LRU-closed between the two, causing the compaction job to fail and all compaction progress to be lost, potentially losing hours' worth of work.