[cdc] Unaware bucket cdc sink should not chain#4203
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JingsongLi
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May 7, 2026
) Bucket unaware append table [1] is a great choice for streaming events into Paimon format for batch consumers. These types of streams can be very high throughput like clickstream data. Currently there is shuffle in the writer #4203 and in my production use cases (Kafka --> Paimon) this shuffles a _lot_ of data. rebalance was added to avoid chaining, instead we can use [startNewChain](https://nightlies.apache.org/flink/flink-docs-stable/docs/dev/datastream/operators/overview/#task-chaining-and-resource-groups). This can avoid the deadlock issue described in that PR without shuffle.
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Purpose
rebalance it to make sure schema change work to avoid infinite loop.
Tests
No test, it is hard to reproduce in the unit test.
API and Format
Documentation