schongloo commented on PR #969:
URL: 
https://github.com/apache/flink-kubernetes-operator/pull/969#issuecomment-3092468887

   > Added some logging related comments.
   > 
   > We should also handle the `stateless` case a bit more gracefully. A simple 
stateless example fails with errors like:
   > 
   > ```
   > ... 
org.apache.flink.kubernetes.operator.exception.UpgradeFailureException: Latest 
checkpoint not externally addressable, manual recovery required.
   > ```
   > 
   > during upgrades.
   > 
   > In general if an upgrade would go through successfully for a regular 
FlinkDeployment it should also go through for a BlueGreenDeployment.
   
   While not necessarily related to the `stateless` case. In this situation 
it's an error I throw when checkpoints are not externally accessible (which is 
mandatory), the confusing part I throw it during the upgrade only. I should 
also validate this type of restriction(s) before the initial deployment.
   
   I've addressed all the simple refactoring/logging comments, remaining to be 
done asap:


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