If you want to .await multiple futures that can return an error you can use tokio::try_join, futures_utils::try_join_all, etc. For example: let ( db

If you want to .await multiple futures that can return an error you can use tokio::try_join, futures_utils::try_join_all, etc. For example: let ( db_eid_cache, table_eid_cache, job_eid_cache, table_summaries_cache, job_summaries_cache, query_summaries_cache, ) = try_join!( create_db_eid_cache(aws_clients.clone(), config), create_table_eid_cache(aws_clients.clone(), config), create_job_eid_cache(aws_clients.clone(), config), create_table_summaries_cache(aws_clients.clone(), config), create_job_summaries_cache(aws_clients.clone(), config), create_query_summaries_cache(aws_clients.clone(), config), )?; The code dealing with your clients looks suspect. Why do you have a global with a .get method that is async and returns a reference? It should probably be sync. On top of that it probably shouldn't be a global variable. Pass it in as context to the handler. I'm also suspicious of having this `AwsClients` struct and a bunch of free functions that take it by owner. Why aren't you adding an `impl` block with those as methods? And why are they taking ownership requiring the .clone`?