Custom `applicationId` not propagated to nested STS client

[jackrein]

Describe the bug

When using role chaining, the custom user agent on the outer client is not propagated to the nested STS client. This is similar to this issue in the JavaScript SDK

Regression Issue

• Select this option if this issue appears to be a regression.

Expected behavior

The applicationId is propagated to the nested sts client used in role chaining:

1. AssumeRole: user-agent: aws-sdk-kotlin/1.5.65 ua/2.1 api/s3#1.5.65 os/macos#15.7.1 lang/kotlin#2.2.20 md/javaVersion#21.0.8 md/jvmName#OpenJDK_64-Bit_Server_VM md/jvmVersion#21.0.8+9-LTS app/MyCustomApp1.0.0 m/b,E,w,o,v,i,T
2. ListBuckets: user-agent: aws-sdk-kotlin/1.5.65 ua/2.1 api/s3#1.5.65 os/macos#15.7.1 lang/kotlin#2.2.20 md/javaVersion#21.0.8 md/jvmName#OpenJDK_64-Bit_Server_VM md/jvmVersion#21.0.8+9-LTS app/MyCustomApp1.0.0 m/b,E,w,o,v,i,T

Current behavior

The applicationId is not present in the userAgent header of the STS AssumeRole request.

1. AssumeRole: user-agent: aws-sdk-kotlin/1.5.65 ua/2.1 api/sts#1.5.65 os/macos#15.7.1 lang/kotlin#2.2.20 md/javaVersion#21.0.8 md/jvmName#OpenJDK_64-Bit_Server_VM md/jvmVersion#21.0.8+9-LTS m/e,E,w
2. ListBuckets: user-agent: aws-sdk-kotlin/1.5.65 ua/2.1 api/s3#1.5.65 os/macos#15.7.1 lang/kotlin#2.2.20 md/javaVersion#21.0.8 md/jvmName#OpenJDK_64-Bit_Server_VM md/jvmVersion#21.0.8+9-LTS app/MyCustomApp1.0.0 m/b,E,w,o,v,i,T

Steps to Reproduce

I created a minimal reproduction repo here

1. Create the following content in ~/.aws/config file:

   [profile second]
   credential_process=/usr/bin/get-credentials
   region=us-west-2
   
   [profile first]
   source_profile=second
   role_arn=arn:aws:iam::123456789012:role/Role

2. Use the SDK with the first role: AWS_PROFILE=first gradle run

   suspend fun main() {
     S3Client {
       logMode = LogMode.LogRequestWithBody + LogMode.LogResponse
       applicationId = "MyCustomApp#1.0.0"
     }.use { s3 ->
       val response = s3.listBuckets()
       println("S3 Buckets:")
       response.buckets?.forEach { bucket ->
           println("- ${bucket.name}")
       }
     }
   }

Possible Solution

No response

Context

Additionally, the # is omitted. What is the correct way to specify the version of the custom application?

AWS SDK for Kotlin version

1.5.65

Platform (JVM/JS/Native)

JVM

Operating system and version

macOS

[lauzadis]

Additionally, the # is omitted. What is the correct way to specify the version of the custom application?

The public documentation on application IDs does not list # as a valid character. I'm not sure if there's a standard character used to specify the application version.

I found the issue with applicationId not being propagated and am working on a fix

[github-actions]

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[lauzadis]

Hello, a fix has been merged and should be available in tomorrow's release, v1.5.68.

[jackrein]

Thank you!