NoSuchMethodError - Troubleshooting Practice

The Problem
I am using DynamoDB in our project, and we add prefix before table names in different Environment such as: dev_, or product.

So I modified the code to add prefix which reads from property file based on environment.

@Configuration
@PropertySource("classpath:default/application.properties", "classpath:${env}/application.properties")
public class AppConfig {
    @Value("aws.product.line:")
    private String tableNamePrefix;

    @Bean
    public DynamoDBMapper dynamoDBMapper() {
        final TableNameOverride tableNameOverride = TableNameOverride.withTableNamePrefix(tableNamePrefix);
        final DynamoDBMapperConfig mapperConfig = new DynamoDBMapperConfig(tableNameOverride);
        final DynamoDBMapper mapper = new DynamoDBMapper(amazonDynamoDB(), mapperConfig);
        return mapper;
    }
    @Bean
    public AmazonDynamoDB amazonDynamoDB()...
}

It compiles but it failed with the following exception when I ran it:
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMapper]: Factory method 'dynamoDBMapper' threw exception; nested exception is java.lang.NoSuchMethodError: com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMapperConfig$TableNameOverride.withTableNamePrefix(Ljava/lang/String;)Lcom/amazonaws/services/dynamodbv2/datamodeling/DynamoDBMapperConfig$TableNameOverride;
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189)
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588)
    ... 60 more
Caused by: java.lang.NoSuchMethodError: com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMapperConfig$TableNameOverride.withTableNamePrefix(Ljava/lang/String;)Lcom/amazonaws/services/dynamodbv2/datamodeling/DynamoDBMapperConfig$TableNameOverride; 

Troubleshooting
Next, I checked the built war, found there are 2 aws-java-sdk:
aws-java-sdk-1.4.2.1.jar
aws-java-sdk-core-1.10.10.jar

In 1.4.2, there is no TableNameOverride.withTableNamePrefix method.

Next, I ran mvn dependency:tree to figure out which library imports and depends on aws-java-sdk, then exclude from it.

<dependency>
    <groupId>xx</groupId>
    <artifactId>xxx</artifactId>
    <exclusions>
        <exclusion>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk-dynamodb</artifactId>
        </exclusion>
        <exclusion>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk</artifactId>
        </exclusion>                    
    </exclusions>
</dependency>

ran mvn dependency:tree again to make sure aws-java-sdk-1.4.2 is gone, ran test, all works now.

Misc:
Check http://docs.oracle.com/javase/8/docs/technotes/guides/jni/spec/types.html#type_signatures:
to know about the type signature meaning:
L fully-qualified-class ;   fully-qualified-class
long f (int n, String s, int[] arr);
has the following type signature:
(ILjava/lang/String;[I)J