A CoLocationConstraint manages the location of a set of tasks (Execution Vertices).
A Co-location group is a group of JobVertices, where the i-th subtask of one vertex has to be executed on the same TaskManager as the i-th subtask of all other JobVertices in the same group.
ScheduledUnit contains the information necessary to allocate a slot for the given task.
A slot sharing units defines which different task (from different job vertices) can be deployed together within a slot.
Defines the location preference constraint.
Indicates resource allocation failures.
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