aws-sdk-ruby: Aws::Errors::MissingCredentialsError: unable to sign request without credentials set

I use IAM-role to assign policy to my EC2 instance, but sometimes it raise missing credential error.

Aws::Errors::MissingCredentialsError: unable to sign request without credentials set

Does anyone have same problem?

About this issue

Original URL
State: closed
Created 8 years ago
Reactions: 19
Comments: 15 (7 by maintainers)

Commits related to this issue

Added configurable IMDS retries. See #1301 — committed to aws/aws-sdk-ruby by trevorrowe 8 years ago
Retry if AWS KMS credentials can't be found **Why**: The same AWS error has happened 22 times over the past 7 days in production. According to this issue: https://github.com/aws/aws-sdk-ruby/issues/1... — committed to 18F/identity-idp by monfresh 7 years ago

Most upvoted comments

@rayway30419 Are you still experiencing the intermittent missing credential errors? Commonly this is caused by the aggressive defaults in attempting to load credentials from the instance metadata service. Once credentials expire, they must be refreshed, but if the metadata service fails to respond, a missing credentials error is raised. I’ve just push a small change that will go out with the next release where you can configure expanded retries and timeouts:

client = Aws::DynamoDB::Client.new(
  region: Aws.config[:region],
  instance_profile_credentials_timeout: 5, # defaults to 1 second
  instance_profile_credentials_retries: 5, # defaults to 0 retries
)

This change will be available in the next release.

+10

trevorrowe on Nov 17, 2016

For what it’s worth, we’re working on an overhaul of the SDK which should reduce or eliminate these autoload issues - message definitely received that they cause problems when threading.

awood45 on Oct 17, 2016

@trevorrowe I’m still seeing this issue on (actually coming from fluentd which uses the SDK):

Ruby 2.3.4 AWS SDK 2.7.0 Linux Kernel 4.9.41

Is this expected? Could this be eventual consistency, instead of code?

jammerful on Sep 5, 2017