[FLINK-18906] Support checkpointing with multiple input operator chained with sources

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.12.0
• Component/s: Runtime / Checkpointing, Runtime / Task
• Labels: pull-request-available
• Assignee: Piotr Nowojski
• Reporter: Piotr Nowojski
• Created: 12/Aug/20 15:29
• Updated: 19/Feb/21 07:27
• Resolved: 25/Sep/20 08:26

Description

Generalize `CheckpointBarrierHandlers` plus hook in sources to `CheckpointBarrierHandlers`.

Issue Links

• links to: GitHub Pull Request #13465