[JENA-1866] SPARQLQueryProcessor: Need volatile to make method thread-safe

• Type: Task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Jena 3.14.0
• Fix Version/s: Jena 3.15.0
• Component/s: Fuseki
• Assignee: Andy Seaborne
• Reporter: Andy Seaborne
• Created: 19/Mar/20 09:35
• Updated: 19/May/20 10:26
• Resolved: 19/Mar/20 10:41

Description

This ticket tracks https://github.com/apache/jena/pull/709 ("intrigus-lgtm" on GitHub).

There needs to be a "happens before" barrier so that any Set and the objects it contains created by generateAcceptedParams() is completed and available to other threads.

Making acceptedParams_ volatile achieves this.

Issue Links

• links to: GitHub Pull Request #709