Zhu Zhu created FLINK-28193:
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Summary: Enable to identify whether a job vertex contains
source/sink operators
Key: FLINK-28193
URL: https://issues.apache.org/jira/browse/FLINK-28193
Project: Flink
Issue Type: Sub-task
Components: Runtime / Coordination
Reporter: Zhu Zhu
Fix For: 1.16.0
Speculative execution does not support sources/sinks in the first version.
Therefore, it will not create speculation instances for vertices which contains
source/sink operators.
Note that a job vertex with no input/output does not mean it is a source/sink
vertex. Multi-input sources can have input. And it's possible that the vertex
with no output edge does not contain any sink operator. Besides that, a new
sink with topology can spread the sink logic into multiple job vertices
connected with job edges.
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