[FLINK-28981] Release Testing: Verify FLIP-245 sources speculative execution

• Type: Sub-task
• Status: Closed
• Priority: Blocker
• Resolution: Done
• Fix Version/s: 1.16.0
• Component/s: Connectors / Common, Runtime / Coordination
• Labels: release-testing
• Assignee: Yunhong Zheng
• Reporter: Zhu Zhu
• Created: 16/Aug/22 03:53
• Updated: 02/Sep/22 13:42
• Resolved: 02/Sep/22 13:42

Description

Speculative execution is introduced in Flink 1.16 to deal with temporary slow tasks caused by slow nodes. This feature currently consists of 4 FLIPs:

• FLIP-168: Speculative Execution core part
• FLIP-224: Blocklist Mechanism
• FLIP-245: Source Supports Speculative Execution
• FLIP-249: Flink Web UI Enhancement for Speculative Execution

This ticket aims for verifying FLIP-245, along with FLIP-168, FLIP-224 and FLIP-249.

More details about this feature and how to use it can be found in this document.

To do the verification, the process can be:

• Write Flink jobs which has some source subtasks running much slower than others. 3 kinds of sources should be verified, including
  • Source functions
  • InputFormat sources
  • FLIP-27 new sources
• Modify Flink configuration file to enable speculative execution and tune the configuration as you like
• Submit the job. Checking the web UI, logs, metrics and produced result.