android - 亚马逊服务异常 : User is not authorized to perform: dynamodb:DescribeTable Status Code: 400; Error Code: AccessDeniedException

Question

我原本以为这个问题是由于区域不匹配造成的，但在更改区域后，我在尝试此处找到的 Amazon AWS 示例时仍然遇到以下错误:

DynamoDBMapper

 AmazonServiceException: User: arn:aws:sts::[My Account
 ARN]:assumed-role/Cognito_AndroidAppUnauth_DefaultRole/ProviderSession
 is not authorized to perform: dynamodb:DescribeTable on resource:
 arn:aws:dynamodb:us-east-1:[My Account ARN]:table/test_table (Service:
 AmazonDynamoDBv2; Status Code: 400; Error Code: AccessDeniedException;
 Request ID: BBFTS0Q8UHTMG120IORC2KSASVVV4KQNSO5AEMVJF66Q9ASUAAJG)

一切都差不多，我唯一改变的是将 DBclient 区域更改为 US_EAST_1，我的测试表托管在该区域并修改使用“Amazon Cognito 入门代码”页面中的信息的常量文件，该页面是通过遵循 Cognito 入门文档生成的。

sdkforandroid-cognito-auth

对于我的 Cognito_AndroidAppUnauth_DefaultRole 角色策略，我修改了默认的移动分析和同步服务权限，以还包括对所有表的所有操作的访问权限，无论是否存在:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "CognitoPolicy",
            "Action": [
                "mobileanalytics:PutEvents",
                "cognito-sync:*"
            ],
            "Effect": "Allow",
            "Resource": [
                "*"
            ]
        },
        {
            "Sid": "DynamoDBPolicy",
            "Effect": "Allow",
            "Action": [
                "dynamodb: *"
            ],
            "Resource": "*"
        }
    ]
}

那么，当使用正确的区域并且 Unauth 策略应该允许表访问时，为什么它声称它没有权限？

编辑:调用 DynamoDB 资源(创建表)上的方法时的堆栈跟踪，它是否有用

   com.amazonaws.AmazonServiceException: User: arn:aws:sts::[My Account ARN]:assumed-role/Cognito_AndroidAppUnauth_DefaultRole/ProviderSession is not authorized to perform: dynamodb:CreateTable on resource: arn:aws:dynamodb:us-east-1:[My Account ARN]:table/test_table (Service: AmazonDynamoDBv2; Status Code: 400; Error Code: AccessDeniedException; Request ID: SDELNSMLO10EV7CM2STC1R9RU3VV4KQNSO5AEMVJF66Q9ASUAAJG)
            at com.amazonaws.http.AmazonHttpClient.handleErrorResponse(Unknown Source)
            at com.amazonaws.http.AmazonHttpClient.executeHelper(Unknown Source)
            at com.amazonaws.http.AmazonHttpClient.execute(Unknown Source)
            at com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.invoke(Unknown Source)
            at com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.createTable(Unknown Source)
            at com.amazonaws.demo.userpreferencesom.DynamoDBManager.createTable(DynamoDBManager.java:72)
            at com.amazonaws.demo.userpreferencesom.UserPreferenceDemoActivity$DynamoDBManagerTask.doInBackground(UserPreferenceDemoActivity.java:99)
            at com.amazonaws.demo.userpreferencesom.UserPreferenceDemoActivity$DynamoDBManagerTask.doInBackground(UserPreferenceDemoActivity.java:85)
            at android.os.AsyncTask$2.call(AsyncTask.java:288)
            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)

Answer 1

与 Amazon 工程师合作，发现问题出在策略配置中:

"dynamodb: *"

应该是

"dynamodb:*"

空间的功能令人惊叹。