Github user EronWright commented on the issue: https://github.com/apache/flink/pull/3692 @StephanEwen in this case, the [MesosTaskManagerParameters](https://github.com/vijikarthi/flink/blob/aeb432dc7fe8bcdd5faa49b8ad5dfb5630ea0747/flink-mesos/src/main/java/org/apache/flink/mesos/runtime/clusterframework/MesosTaskManagerParameters.java#L39) is acting as the configuration class and the various `ConfigOption`'s are defined within. Placing constants also into `ConfigConstants` is now unnecessary and discouraged, and I feel that's the (minor) issue here.
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