Long retry in azure datafactory

We have a requirement of retry the particular slice after 1 hour if validation failed.
I gone through the Azure ADF docs here and got option of longRetry but its not working as expected.

Policy validation in input dataset:-

 "policy": {
            "validation": {
                "minimumSizeMB": 0.000005
            }
        }

Long retry in pipeline:-

 "policy": {
                    "concurrency": 1,
                    "retry": 3,
                    "longRetry": 2,
                    "longRetryInterval": "01:00:00"
                }

Summary:- We want to check validation of particular dataset every hour with pipeline having frequency daily once.

Please let me know if am doing anything wrong here.

Thanks

Long retry in azure datafactory