@VisibleForTesting
  ContainerProcessManager createContainerProcessManager() {
    return new ContainerProcessManager(config, state, metrics, containerPlacementMetadataStore, localityManager,
        metadataChangedAcrossAttempts);
  }
Stops all components of the JobCoordinator.
samza-core/src/main/java/org/apache/samza/clustermanager/ClusterBasedJobCoordinator.java