Major org.springframework.integration.channel.AbstractMessageChannel registers io.micrometer.core.instrument.Meter instances, but never de-registers them (nor do I see any way to do that in Micrometer, though).
This, combined with dynamic flows and enough channels being created, leads to a memory leak rather quickly.
I've noticed this one after having turned on micrometer metrics and leaving the application running for a few days - the application creates a few hundred of dynamic flows, with around 20k channels, every day. Given enough messages passing through these channels, the amount of memory occupied by com.codahale.metrics.WeightedSnapshot.WeightedSample et al. quickly blows the roof off the top of the app's heap.
