Timeout in load_from_env in AWS lambda

[rlbrillband]

I have a lambda that uses credentials stored in SSM. To fetch this, I have the following code. I added some extra logging to pin down the issue.

tracing::debug!("Loading config");
let config = aws_config::load_from_env().await;
tracing::debug!("Creating SSM client");
client = aws_sdk_ssm::Client::new(&config);
debug!("Fetching SSM parameter");
// Fetch the credentials

I run it on my local machine (using the AWS command line SSO and cargo lambda watch/invoke) then it works. However when I deploy the lambda into AWS and invoke it there, it times out on the load_from_env function. Even when allowing a much more generous timeout (120s) it still does not resolve. Logs:

DEBUG Loading config
DEBUG load_config_file: config file not found path=~/.aws/config file=Default(Config)
DEBUG load_config_file: config file loaded path=Some("~/.aws/config") size=0 file=Default(Config)
EXTENSION	Name: collector	State: Ready	Events: [INVOKE, SHUTDOWN]
INIT_REPORT Init Duration: 10009.12 ms	Phase: init	Status: timeout

From my Cargo.toml:
aws-config = { version = "1.5.11", features = ["behavior-version-latest"] }

Is perhaps something wrong with my deployment? It's very unclear what is causing the config to not load. It would be useful if it could log some known causes of timeouts.

[landonxjames]

Could you please enable a tracing subscriber so we could see the SDK's internal logs? Instructions for that can be found here: https://docs.aws.amazon.com/sdk-for-rust/latest/dg/logging.html

[rlbrillband]

Thanks for the reply. I think I did actually have the subscriber, but the log level was only debug. Here are the trace logs:

DEBUG Loading config
DEBUG load_config_file: config file not found path=~/.aws/config file=Default(Config)
DEBUG load_config_file: config file loaded path=Some("~/.aws/config") size=0 file=Default(Config)
TRACE sending request to buffer worker
TRACE worker polling for next message
TRACE processing new request
TRACE resumed=false worker received request; waiting for service readiness
TRACE poll_ready; idle
TRACE poll_ready; connecting
TRACE Http::connect; scheme=Some("http"), host=Some("localhost"), port=Some(Port(4317))
TRACE poll_ready; not ready
TRACE service.ready=false delay
EXTENSION Name: collector State: Ready Events: [INVOKE, SHUTDOWN]
INIT_REPORT Init Duration: 10008.97 ms Phase: init Status: timeout