Hi,
When I am reading the code from flink-training-repo [1], I noticed the
following code:
```java
public static class EnrichmentFunction
extends RichCoFlatMapFunction<TaxiRide, TaxiFare, RideAndFare> {
private ValueState<TaxiRide>rideState; private
ValueState<TaxiFare>fareState; ... }
```
From my understanding, since ValueState variables here are scoped to
each instance, they should not be serialized for the performance sake.
Thus, we should always mark them with "transient". Similar discussion
can be found here [2].
Should we always mark ValueState as "transient", and why? Please help me
to figure it out.
[1]
https://github.com/apache/flink-training/blob/master/rides-and-fares/src/solution/java/org/apache/flink/training/solutions/ridesandfares/RidesAndFaresSolution.java
[2]
https://stackoverflow.com/questions/72556202/flink-managed-state-as-transient
