使用EC2 Java API创建新EC2实例时出现与标记创建相关的错误

我正在尝试创建一个新的 EC2 instance 使用 AWS JAVA API . 但我得到了以下异常消息

线程“main”中出现异常 通用域名格式。amazonaws。服务。ec2.model。AmazonEC2Exception:标记规范 资源类型必须有一个值(服务:AmazonEC2;状态代码:400; 错误代码:InvalidParameterValue;请求ID:XXXXXX)

public static void main(String[] args) {
    Ec2Utilities utils = new Ec2Utilities();
    Map<String, String> tagMap = new HashMap<String, String>();
    tagMap.put("name", "newinstance");
    tagMap.put("category", "cat1");
    utils.createInstanceFromAmi("t2.micro", "ami-sdfsds", 1, "sg-sdfsd", "nammme", tagMap);
}

public void createInstanceFromAmi(String instanceType, String amiId, int count, String securityGroup,
        String keyName, Map<String, String> tagMap) {
    AmazonEC2 ec2Client = Auth.getCredentails();
    TagSpecification tagSpecs = new TagSpecification();
    tagSpecs.setTags(buildTags(tagMap));
    RunInstancesRequest runInstancesRequest = new RunInstancesRequest().withTagSpecifications(tagSpecs)
                                                                       .withInstanceType(instanceType)
                                                                       .withImageId(amiId)
                                                                       .withMinCount(count)
                                                                       .withMaxCount(2)
                                                                       .withSecurityGroupIds(securityGroup)
                                                                       .withKeyName(keyName);

    RunInstancesResult runInstances = ec2Client.runInstances(runInstancesRequest);

}

private List<Tag> buildTags(Map<String, String> tagMap) {
    List<Tag> tagList = new ArrayList<Tag>();
    tagMap.forEach((k, v) -> {
        tagList.add(new Tag(k, v));
    });
    System.out.println(tagList);
    return tagList;
}