[SPARK-47327] Fix thread safety issue in ICU Collator

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.0
• Fix Version/s: 4.0.0
• Component/s: Spark Core, SQL
• Labels: pull-request-available
• Assignee: Stefan Kandic
• Reporter: Stefan Kandic
• Created: 08/Mar/24 13:34
• Updated: 16/Mar/24 04:24
• Resolved: 11/Mar/24 23:47

Description

ICU Collator is not thread-safe by default so we have to freeze it in order to produce correct results in multi-threaded environment

Issue Links

• links to: GitHub Pull Request #45436
• links to: GitHub Pull Request #45501