Zhu Zhu created FLINK-28980:
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Summary: Release Testing: Verify FLIP-168 speculative execution
Key: FLINK-28980
URL: https://issues.apache.org/jira/browse/FLINK-28980
Project: Flink
Issue Type: Sub-task
Components: Runtime / Coordination
Reporter: Zhu Zhu
Fix For: 1.16.0
Speculative execution is introduced in Flink 1.16 to deal with temporary slow
tasks caused by slow nodes. More details about this feature can be found in
this documentation [PR|https://github.com/apache/flink/pull/20507].
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 to verify FLIP-168, along with FLIP-224 and FLIP-249.
To do the verification, the process can be:
- Write a Flink job which has a subtask running much slower than others (e.g.
sleep indefinitely if it runs on a certain host, the hostname can be retrieved
via InetAddress.getLocalHost().getHostName(), or if its (subtaskIndex +
attemptNumer) % 2 == 0)
- 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.
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