[jira] [Created] (FLINK-38867) FlinkBlueGreenDeployment: savepointRedeployNonce does not respect user-provided initialSavepointPath

["James Kan (Jira)" <ji...@apache.org>]

James Kan created FLINK-38867:
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             Summary: FlinkBlueGreenDeployment: savepointRedeployNonce does not respect user-provided initialSavepointPath
                 Key: FLINK-38867
                 URL: https://issues.apache.org/jira/browse/FLINK-38867
             Project: Flink
          Issue Type: Bug
          Components: Kubernetes Operator
            Reporter: James Kan


h4. Description

The FlinkBlueGreenDeployment controller does not properly honor the [`savepointRedeployNonce`|https://nightlies.apache.org/flink/flink-kubernetes-operator-docs-main/docs/custom-resource/job-management/#redeploy-using-the-savepointredeploynonce] parameter during subsequent deployments. When the nonce is incremented, the controller ignores the user-specified `initialSavepointPath` and instead uses the savepoint from the previous deployment (blue or green) being terminated.
h4. Expected Behavior

When `savepointRedeployNonce` is incremented in the FlinkBlueGreenDeployment spec, the controller should respect the user-specified `initialSavepointPath` and ensure the new active deployment (blue or green being transitioned to) starts from the specified savepoint location.
h4. Current Behavior

- Initial deployments: `initialSavepointPath` is correctly applied ✓

- Subsequent deployments for FlinkBlueGreenDeployments: `initialSavepointPath` is ignored when `savepointRedeployNonce` is updated ✗. 
h4. Impact

This prevents manual savepoint selection functionality required for manual recoveries and creates inconsistencies with the expected behaviour of savepointRedeployNonce described in the Flink documentation.



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