[FLINK-36076] Hotfix: Set isSchemaChangeApplying as volatile for thread safe.

• Type: Technical Debt
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: cdc-3.1.1
• Fix Version/s: cdc-3.2.0
• Component/s: Flink CDC
• Labels: pull-request-available
• Assignee: Hongshun Wang
• Reporter: Hongshun Wang
• Created: 16/Aug/24 09:34
• Updated: 27/Aug/24 17:01
• Resolved: 27/Aug/24 17:01

Description

Current, we apply schema change asynchronous.  
SchemaChangeThreadPool will set isSchemaChangeApplying as true when apply schema change event. And the main thread which handle operater event will check isSchemaChangeApplying.
 
For thread safe, this should be volatile.

Issue Links

• links to: GitHub Pull Request #3556