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https://issues.apache.org/jira/browse/FLINK-28193?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhu Zhu closed FLINK-28193.
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Resolution: Done
Done via cef491eab34f904cf67f8a0392d48c03def249ff
> 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
> Assignee: Zhu Zhu
> Priority: Major
> Labels: pull-request-available
> 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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