I’m trying to understand how Flink works - I created a

KeyedCoProcessFunction

and based on these docs, it recommends setting the logger to

static

. if the parallelism of the operator for the coproessfunction is > 1, the operator might exist on multiple nodes, so how would a static variable work in this case?

This is only to avoid create multiple Logger instance in a single taskmanger. It does not means operators in different taskmanager can share the same instance.