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  • In upcoming release, LocalityManager class will be changed into an interface. Any code which depends on LocalityManager class directly in open source should migrate to CoordinatorStreamBasedLocalityManager.
  • We are not altering changing the existing data storage format of the ContainerModel in coordinator stream for yarn deployment model.
  • ContainerId field in ContainerModel which is deprecated in samza 0.13 version will be removed in the future release. Open source users using containerId field from ContainerModel should migrate and use processorID field in ContainerModel.
  • All of the existing methods in TaskNameGrouper and BalancingTaskNameGrouper will be deprecated. 
  • It’s recommended that the users recompile their deployable after migrating to the samza version that has this feature.
  • Will add compatibility test to verify that deprecating/changing the TaskNameGrouper API changes does not alter the existing behaviors.

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