Unable to use Spring cloud to connect with AWS SES : <p>I have made a very simple maven project using Spring Boot. I am trying to connect with AWS SES using Spring cloud. While running the project, I am getting following error: </p>

<p><strong>No valid instance id defined</strong></p>

<pre><code>Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.cloud.aws.core.env.ResourceIdResolver.BEAN_NAME': Invocation of init method failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'stackResourceRegistryFactoryBean' defined in class path resource [org/springframework/cloud/aws/autoconfigure/context/ContextStackAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cloud.aws.core.env.stack.config.StackResourceRegistryFactoryBean]: Factory method 'stackResourceRegistryFactoryBean' threw exception; nested exception is java.lang.IllegalArgumentException: No valid instance id defined
</code></pre>

<p>I am showing snippets of files in use:</p>

<p>pom.xml</p>

<pre><code>&lt;parent&gt;
    &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
    &lt;artifactId&gt;spring-boot-starter-parent&lt;/artifactId&gt;
    &lt;version&gt;2.1.3.RELEASE&lt;/version&gt;
&lt;/parent&gt;

&lt;dependencies&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
        &lt;artifactId&gt;spring-boot-starter-web&lt;/artifactId&gt;
        &lt;exclusions&gt;
            &lt;exclusion&gt;
                &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
                &lt;artifactId&gt;spring-boot-starter-tomcat&lt;/artifactId&gt;
            &lt;/exclusion&gt;
        &lt;/exclusions&gt;
    &lt;/dependency&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
        &lt;artifactId&gt;spring-boot-starter-mail&lt;/artifactId&gt;
    &lt;/dependency&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
        &lt;artifactId&gt;spring-boot-starter-thymeleaf&lt;/artifactId&gt;
    &lt;/dependency&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
        &lt;artifactId&gt;spring-boot-starter-actuator&lt;/artifactId&gt;
    &lt;/dependency&gt;


    &lt;dependency&gt;
        &lt;groupId&gt;org.springframework.cloud&lt;/groupId&gt;
        &lt;artifactId&gt;spring-cloud-starter-aws&lt;/artifactId&gt;
        &lt;version&gt;2.1.0.RELEASE&lt;/version&gt;
    &lt;/dependency&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;com.amazonaws&lt;/groupId&gt;
        &lt;artifactId&gt;aws-java-sdk-ses&lt;/artifactId&gt;
        &lt;version&gt;1.11.505&lt;/version&gt;
    &lt;/dependency&gt;

    &lt;dependency&gt;
        &lt;groupId&gt;javax&lt;/groupId&gt;
        &lt;artifactId&gt;javaee-web-api&lt;/artifactId&gt;
        &lt;version&gt;7.0&lt;/version&gt;
        &lt;scope&gt;provided&lt;/scope&gt;
    &lt;/dependency&gt;
&lt;/dependencies&gt;
</code></pre>

<p>SimpleMailAutoConfig.java</p>

<pre><code>@Configuration
public class SimpleMailAutoConfig {

    @Bean
    public AmazonSimpleEmailService amazonSimpleEmailService(AWSCredentialsProvider credentialsProvider) {
         return AmazonSimpleEmailServiceClientBuilder.standard()
            .withCredentials(credentialsProvider)
            .withRegion(Regions.US_EAST_1).build();
    }

    @Bean
    public MailSender mailSender(AmazonSimpleEmailService ses) {
        return new SimpleEmailServiceMailSender(ses);
    }
}
</code></pre>

<p>MailSendingService.java</p>

<pre><code>@Service
public class MailSendingService {

    @Autowired
    private MailSender mailSender;

    public void sendMailMessage() {
        SimpleMailMessage simpleMailMessage = new SimpleMailMessage();
        simpleMailMessage.setFrom("foo@bar.com");
        simpleMailMessage.setTo("example@test.com");
        simpleMailMessage.setSubject("test subject");
        simpleMailMessage.setText("test content");
        this.mailSender.send(simpleMailMessage);
    }
}
</code></pre>

<p>Application.java</p>

<pre><code>@SpringBootApplication
@ComponentScan("com.example")
public class Application extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder  application) {
        return application.sources(Application.class);
    }

    public static void main(String[] args) throws Exception {
        SpringApplication.run(Application.class, args);
    }
}
</code></pre>

<p>application.properties</p>

<pre><code>cloud.aws.credentials.accessKey=${MyAccessKey}
cloud.aws.credentials.secretKey=${MySecretKey}
cloud.aws.region.static=us-east-1
</code></pre>

<p>I am not trying to connect to any EC2 instance. Not able to find any proper documentation for using spring cloud for SES</p>
