aws cdk入门-`cdk synth`命令的“空”输出

Question

我正在尝试遵循官方教程:https://docs.aws.amazon.com/cdk/latest/guide/gett_started.html

cd hello-cdk-java

cdk init app --language java

mvn compile

cdk ls

# modify the stack java code
...

# this for some reason only outputs Metadata for me
# even `mvn clean package` doesn't help
cdk synth
Resources:
  CDKMetadata:
    Type: AWS::CDK::Metadata
    Properties:
      Modules: aws-cdk=1.61.1,@aws-cdk/cloud-assembly-schema=1.61.1,@aws-cdk/core=1.61.1,@aws-cdk/cx-api=1.61.1,jsii-runtime=Java/14.0.1
    Condition: CDKMetadataAvailable
Conditions:
  CDKMetadataAvailable:
    Fn::Or:
      - Fn::Or:
          - Fn::Equals:
              - Ref: AWS::Region
              - ap-east-1
          - Fn::Equals:
              - Ref: AWS::Region
              - ap-northeast-1
          - Fn::Equals:
              - Ref: AWS::Region
              - ap-northeast-2
          - Fn::Equals:
              - Ref: AWS::Region
              - ap-south-1
          - Fn::Equals:
              - Ref: AWS::Region
              - ap-southeast-1
          - Fn::Equals:
              - Ref: AWS::Region
              - ap-southeast-2
          - Fn::Equals:
              - Ref: AWS::Region
              - ca-central-1
          - Fn::Equals:
              - Ref: AWS::Region
              - cn-north-1
          - Fn::Equals:
              - Ref: AWS::Region
              - cn-northwest-1
          - Fn::Equals:
              - Ref: AWS::Region
              - eu-central-1
      - Fn::Or:
          - Fn::Equals:
              - Ref: AWS::Region
              - eu-north-1
          - Fn::Equals:
              - Ref: AWS::Region
              - eu-west-1
          - Fn::Equals:
              - Ref: AWS::Region
              - eu-west-2
          - Fn::Equals:
              - Ref: AWS::Region
              - eu-west-3
          - Fn::Equals:
              - Ref: AWS::Region
              - me-south-1
          - Fn::Equals:
              - Ref: AWS::Region
              - sa-east-1
          - Fn::Equals:
              - Ref: AWS::Region
              - us-east-1
          - Fn::Equals:
              - Ref: AWS::Region
              - us-east-2
          - Fn::Equals:
              - Ref: AWS::Region
              - us-west-1
          - Fn::Equals:
              - Ref: AWS::Region
              - us-west-2

关于发生了什么或者如何调试这个问题有什么线索吗？

我使用的是带有以下CLI版本的Mac OS X 10.15.6：

$ aws --version
aws-cli/2.0.10 Python/3.8.2 Darwin/19.6.0 botocore/2.0.0dev14

$ cdk --version
1.61.1 (build 347918f)

Answer 1

我从模板生成了一个新项目，它突然开始工作。我不确定是什么改变了--我也尝试使用不同的--profile，但一开始也不起作用。

问题现在解决了--如果出了问题，值得从头开始！