Hi, The current rescale API appears to be a work in progress. A couple years ago, we disabled access to the API [1].
I'm looking into this problem as part of working on autoscaling [2] where we currently require a full restart of the job to apply the parallelism overrides. This adds additional delay and comes with the caveat that we don't know whether sufficient resources are available prior to executing the scaling decision. We obviously do not want to get stuck due to a lack of resources. So a rescale API would have to ensure enough resources are available prior to restarting the job. I've created an issue here: https://issues.apache.org/jira/browse/FLINK-30773 Any comments or interest in working on this? -Max [1] https://issues.apache.org/jira/browse/FLINK-12312 [2] https://cwiki.apache.org/confluence/display/FLINK/FLIP-271%3A+Autoscaling
