[SPARK-38675] Race condition in BlockInfoManager during unlock

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 3.3.0
• Fix Version/s: 3.3.0
• Component/s: Spark Core
• Target Version/s: 3.3.0
• Assignee: Herman van Hövell
• Reporter: Herman van Hövell
• Created: 28/Mar/22 11:00
• Updated: 02/Jun/22 08:48
• Resolved: 02/Jun/22 08:48

Description

There is a race condition between unlock and releaseAllLocksForTask in the block manager. This can lead to negative reader counts (which trip an assertion).

Issue Links

• links to: [Github] Pull Request #35991 (hvanhovell)