[FLINK-5887] Make CheckpointBarrier type immutable

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.3.0
• Fix Version/s: 1.3.0
• Component/s: Runtime / State Backends
• Assignee: Stephan Ewen
• Reporter: Stephan Ewen
• Created: 22/Feb/17 16:12
• Updated: 23/Feb/17 19:11
• Resolved: 23/Feb/17 19:11

Description

The title says it all. Such a critical type that is referenced and compared to should not be mutable.