Caused by: java.net.UnknownHostException: sts.us-east-1.amazonaws.com

[rcbandit111]

I have a Java app with the following dependencies after migration from V1 to V2:

implementation "software.amazon.awssdk:s3:2.35.7"
implementation "software.amazon.awssdk:sts:2.35.7"

Java code:

import software.amazon.awssdk.services.sts.StsClient;
import software.amazon.awssdk.services.sts.model.AssumeRoleRequest;
import software.amazon.awssdk.services.sts.model.AssumeRoleResponse;
import software.amazon.awssdk.services.sts.model.Credentials;

StsClient stsClient = StsClient.builder()
              .credentialsProvider(StaticCredentialsProvider.create(credentials))
              .region(Region.of("us-east-1"))
              .build();

    AssumeRoleRequest assumeRequest = AssumeRoleRequest.builder()
              .roleArn(awsArn)
              .durationSeconds(3600)
              .roleSessionName("test")
              .build();

    AssumeRoleResponse assumeResult = stsClient.assumeRole(assumeRequest);
    Credentials credentials2 = assumeResult.credentials();

    AwsSessionCredentials basicSessionCredentials = AwsSessionCredentials.builder()
              .accessKeyId("accessKeyId")
              .secretAccessKey("secretAccessKey")
              .sessionToken(credentials2.sessionToken())
              .build();

I get this error when I try to connect:

        Suppressed: software.amazon.awssdk.core.exception.SdkClientException: Request attempt 1 failure: Unable to execute HTTP request: sts.us-east-1.amazonaws.com: Name has no usable address
        Suppressed: software.amazon.awssdk.core.exception.SdkClientException: Request attempt 2 failure: Unable to execute HTTP request: sts.us-east-1.amazonaws.com
        Suppressed: software.amazon.awssdk.core.exception.SdkClientException: Request attempt 3 failure: Unable to execute HTTP request: sts.us-east-1.amazonaws.com
Caused by: java.net.UnknownHostException: sts.us-east-1.amazonaws.com

DNS is working fine. Is this link no longer used? I use this code deployed in Kubernetes as a pod.