Jackie-Jiang commented on issue #3885: Actively check cluster changes if there is no callback for a long time URL: https://github.com/apache/incubator-pinot/pull/3885#issuecomment-468087947 @kishoreg By doing deduplication on our side, we get more control on the interval between change checks (no interval for Helix batch-mode, so we might end up doing more fetches), and we can track the cluster change queue time (also, the logic is much simpler than the Helix batch-mode). In order to add proactive check for all type of changes (not only external view), the change handler must implement the same interface, thus making the change big.
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