[BEAM-7962] Drop support for Flink 1.5 and 1.6

• Type: Task
• Status: Triage Needed
• Priority: P2
• Resolution: Fixed
• Fix Version/s: 2.17.0
• Component/s: runner-flink
• Assignee: Maximilian Michels
• Reporter: Maximilian Michels
• Created: 13/Aug/19 09:40
• Updated: 13/Apr/23 10:57
• Resolved: 24/Sep/19 09:24

Description

With Flink 1.9 around the corner, we should consider dropping support for Flink 1.5 and 1.6.

This will get rid of Flink 1.5/1.6 specific workarounds, e.g. make use of Flink's preSnapshotBarrier in AbstractStreamOperator which removes the needs to buffer elements during a snapshot.

Dropping 1.5/1.6 will also decrease the build time.

Issue Links

• Dependency: BEAM-7730 Add Flink 1.9 build target and Make FlinkRunner compatible with Flink 1.9
• is related to: BEAM-8375 Correct the command for Start a Flink job server in `environments.md`
• is related to: BEAM-8377 Remove the flink-1.6 from the project-mappings
• relates to: BEAM-6733 Use Flink 1.6/1.7 prepareSnapshotPreBarrier to replace BufferedOutputManager
• links to: GitHub Pull Request #9632