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In each ExecutionJobVertex there is a speculative execution thread used for detect the long tail execution in this ExecutionJobVertex periodically based on above three rules.

todo..


Handle of the situation of failover 


Black list of node

Yarn


k8s


Mesos


Manage input and output of each ExecutionVertex

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Manage middle ResultPartition 


Metrics


Web UI

Limitations


Configuration


Compatibility, Deprecation, and Migration Plan

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