`cfn init` shows warning: Could not find specified format 'date-time' for type 'string'. Defaulting to 'String'

通过为 Java 资源运行 cfn init 并选择 codegen model 1，使用 cfn 0.2.1 重现该警告。先从生成的 ResourceModel.java 路径和报告中显示的 RPDK 日志条目开始，然后追踪哪个生成步骤处理日期时间格式。当 cfn init 在没有报告中的警告的情况下完成，并且生成的模型按预期生成时，即表示完成。

MacBook@ ~/workspace/test-r-p $ cfn --version
cfn 0.2.1
MacBook@ ~/workspace/test-r-p $ cfn init
Initializing new project
Do you want to develop a new resource(r) or a module(m)?.
>> r
What's the name of your resource type?
(Organization::Service::Resource)
>> mparnisa::test::rp
Select a language for code generation:
[1] go
[2] java
[3] python36
[4] python37
(enter an integer):
>> 2
Enter a package name (empty for default 'com.mparnisa.test.rp'):
>>
Choose codegen model - 1 (default) or 2 (guided-aws):
>> 1
Could not find specified format 'date-time' for type 'string'. Defaulting to 'String'
Could not find specified format 'date-time' for type 'string'. Defaulting to 'String'
Initialized a new project in /Users/mparnisa/workspace/test-r-p

In the RPDK log:

[2021-01-11T22:30:50Z] DEBUG    - ResourceModel POJO: /Users/mparnisa/workspace-sync/test-r-p/target/generated-sources/rpdk/com/mparnisa/test/rp/ResourceModel.java
[2021-01-11T22:30:50Z] ERROR    - Could not find specified format 'date-time' for type 'string'. Defaulting to 'String'
[2021-01-11T22:30:50Z] ERROR    - Could not find specified format 'date-time' for type 'string'. Defaulting to 'String'
[2021-01-11T22:30:50Z] DEBUG    - Overwriting '/Users/mparnisa/workspace-sync/test-r-p/target/generated-sources/rpdk/com/mparnisa/test/rp/ResourceModel.java'