Truong Duc Kien created FLINK-11148:
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Summary: Rescaling operator regression in Flink 1.7
Key: FLINK-11148
URL: https://issues.apache.org/jira/browse/FLINK-11148
Project: Flink
Issue Type: Bug
Affects Versions: 1.7.0
Reporter: Truong Duc Kien
We have a job using 20 TaskManager with 3 slot each.
Using Flink 1.4, when we rescale a data stream from 60 to 20, each TaskManager
will only have one downstream slot, that receives the data from 3 upstream
slots in the same TaskManager.
Using Flink 1.7, this behaviour no longer hold true, multiple downstream slots
are being assigned to the same TaskManager. This change is causing imbalance in
our TaskManager load.
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