Lambda AWS Rekognition到DynamoDB-错误

Question

我正在使用本教程将Rekognition结果链接到DynamoDB表。 它给了我这个错误：

{
"errorMessage": "Unable to get object metadata from S3. Check object key, region and/or access permissions.",
"errorType": "InvalidS3ObjectException",
"stackTrace": [
    "Request.extractError (/var/runtime/node_modules/aws-sdk/lib/protocol/json.js:48:27)",
    "Request.callListeners (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:105:20)",
    "Request.emit (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:77:10)",
    "Request.emit (/var/runtime/node_modules/aws-sdk/lib/request.js:683:14)",
    "Request.transition (/var/runtime/node_modules/aws-sdk/lib/request.js:22:10)",
    "AcceptorStateMachine.runTo (/var/runtime/node_modules/aws-sdk/lib/state_machine.js:14:12)",
    "/var/runtime/node_modules/aws-sdk/lib/state_machine.js:26:10",
    "Request.<anonymous> (/var/runtime/node_modules/aws-sdk/lib/request.js:38:9)",
    "Request.<anonymous> (/var/runtime/node_modules/aws-sdk/lib/request.js:685:12)",
    "Request.callListeners (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:115:18)"
]
}

GitHub使用的代码是this 。

我确保lambda-bucket和表的region-name是相同的。

我是一个入门者，因此将不胜感激！

谢谢！

编辑：我做了一些修改，现在它给了我：

{
"errorMessage": "Requested resource not found",
"errorType": "ResourceNotFoundException",
"stackTrace": [
    "Request.extractError (/var/runtime/node_modules/aws-sdk/lib/protocol/json.js:48:27)",
    "Request.callListeners (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:105:20)",
    "Request.emit (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:77:10)",
    "Request.emit (/var/runtime/node_modules/aws-sdk/lib/request.js:683:14)",
    "Request.transition (/var/runtime/node_modules/aws-sdk/lib/request.js:22:10)",
    "AcceptorStateMachine.runTo (/var/runtime/node_modules/aws-sdk/lib/state_machine.js:14:12)",
    "/var/runtime/node_modules/aws-sdk/lib/state_machine.js:26:10",
    "Request.<anonymous> (/var/runtime/node_modules/aws-sdk/lib/request.js:38:9)",
    "Request.<anonymous> (/var/runtime/node_modules/aws-sdk/lib/request.js:685:12)",
    "Request.callListeners (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:115:18)"
]

}

Answer 1

发生这种情况的原因有两个：

1）资源绝对不存在。 三重检查存储桶名称，DynamoDB表名称，区域等。

2）您的函数很可能缺少权限。 检查您的Lambda函数正在使用的IAM角色，并为其添加正确的策略。 在这种情况下，您的函数需要访问S3，DynamoDB和Rekognition。 确保所有这些策略都已附加到IAM角色。

Answer 2

您看到ResourceNotFoundException的事实提示了两个潜在原因：

• Lambda函数找不到DynamoDB表：通过设置config.dynamo.tableName = '<your table>' ，确保已修改config.js以正确包含DynamoDB表的名称
• 重新识别无法从S3中读取图像：确保图像文件名采用faces.jpg而不是test faces.jpg的形式（转义为test+faces.jpg ）