Sharded exchanges can be enabled by using the a plugin with rabbitmq. It is useful for distributing load across multiple queue for the same routing keys.
Using sharded exchanges, you can shard messages across the cluster so that a single node doesn’t become overwhelmed.
Sometimes we run into weird bugs or buggish situations that are frustrating but are actually fun to solve. I ran into a similar problem recently. A good old NumberFormatException in the open-source analytics dashboard service: Metabase.
We use Metabase to create product metric dashboards. Recently, they allowed caching long running queries and it allows you to set the max entry size as a MAX CACHE ENTRY SIZE setting in kilobytes. This is where the fun starts!