[LUCENE-2783] Deadlock in IndexWriter

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.9.3
• Fix Version/s: 2.9.4
• Component/s: core/index

Environment

ALL

• Lucene Fields: New, Patch Available
• Assignee: Unassigned
• Reporter: Christoph Goller
• Created: 29/Nov/10 09:18
• Updated: 28/Aug/22 12:36
• Resolved: 29/Nov/10 10:37

Description

If autoCommit == true a merge usually triggers a commit. A commit (prepareCommit) can trigger a merge vi the flush method. There is a synchronization mechanism for commit (commitLock) and a separate synchronization mechanism for merging (ConcurrentMergeScheduler.wait). If one thread holds the commitLock monitor and another one holds the ConcurrentMergeScheduler monitor we have a deadlock.