Hi, If you have such data distribution, then most likely your collocation strategy is incorrect or at least not optimal. If your number of partitions is much bigger than number of nodes and number of unique affinity keys is much bigger than number of partitions, such skew will be minimized. "Much bigger" here generally means orders of magnitude. Having said that, I would recommend to revisit your data modes (in case this questions comes from a real use case). Otherwise, you can always implement your own AffinityFunction and customize data distribution, but this is not a trivial task.
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