java - 在 EC2 实例上运行时，Amazon S3 不返回响应或抛出错误

Question

我正在尝试使用访问 key 和 key 凭据连接到 S3 存储桶。这在我的本地机器上可以正常工作。但是，当我尝试在 EC2 实例上运行它时，执行似乎停止在 result = s3Client.listObjectsV2(request); 行。没有异常(exception)。根本没有任何反应。我真的很感激任何帮助。

Java代码

    AmazonS3 s3Client = AmazonS3ClientBuilder.standard().withCredentials(new AWSStaticCredentialsProvider(new BasicAWSCredentials(accesskey, secretkey)))
        .withRegion(region).build();

    ListObjectsV2Result result = null;
    List<S3ObjectSummary> objects = null;
    String continuationToken = null;

    System.out.println("Starting loop to request information");

    int count = 1;
    do {
         ListObjectsV2Request request = new ListObjectsV2Request();
         request.setBucketName(bucket);
         request.setContinuationToken(continuationToken);

         System.out.println("Placing request information #" + count);
         result = s3Client.listObjectsV2(request);
         System.out.println("Got response for request #" + count++);

         continuationToken = result.getNextContinuationToken();
         objects = result.getObjectSummaries();

         for (S3ObjectSummary os : objects) {
             System.out.println(os.getKey());
         }
    } while (continuationToken != null);

pom.xml

    <!-- https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk -->
    <dependency>
        <groupId>com.amazonaws</groupId>
        <artifactId>aws-java-sdk</artifactId>
        <version>1.11.466</version>
    </dependency>

S3 存储桶策略

{
    "Version": "2012-10-17",
    "Id": "Policy1563965234895",
    "Statement": [
        {
            "Sid": "Stmt1563965231235",
            "Effect": "Allow",
            "Principal": {
                "AWS": [
                    "arn:aws:iam::xxxxxxxxxxxx:user/xyz_dev",
                ]
            },
            "Action": "s3:*",
            "Resource": [
                "arn:aws:s3:::xxxx-yyy-bucket",
                "arn:aws:s3:::xxxx-yyy-bucket/*"
            ]
        }
    ]
}

Answer 1

感谢您的回复。我的代码存在多个问题(这不是 Amazon S3 的问题)

1. 这是臭名昭著的错误 java.lang.NoSuchFieldError: SIGNING_REGION，但仅发生在 EC2 上。它没有被代码周围的 try-catch block 捕获，而是在 HTTP 响应中。
2. 我的项目基于 Spring Boot，它错误地导入了不同版本的 aws-sdk 模块
3. 我有另一个 POM 条目 hadoop-aws，它有自己的 aws-sdk 版本

修复:

1. 添加了单独的 aws-sdk 模块条目，而不是完整的 aws-java-sdk 亚马逊网站 aws-java-sdk-cognitoidp

   <!-- https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk-core -->
   <dependency>
       <groupId>com.amazonaws</groupId>
       <artifactId>aws-java-sdk-core</artifactId>
   </dependency>
   
   <!-- https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk-cognitoidentity -->
   <dependency>
       <groupId>com.amazonaws</groupId>
       <artifactId>aws-java-sdk-cognitoidentity</artifactId>
   </dependency>
   
   <!-- https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk-cognitoidp -->
   <dependency>
       <groupId>com.amazonaws</groupId>
       <artifactId>aws-java-sdk-cognitoidp</artifactId>
   </dependency>
   
   <!-- https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk-kms -->
   <dependency>
       <groupId>com.amazonaws</groupId>
       <artifactId>aws-java-sdk-kms</artifactId>
   </dependency>
   
   <!-- https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk-s3 -->
   <dependency>
       <groupId>com.amazonaws</groupId>
       <artifactId>aws-java-sdk-s3</artifactId>
   </dependency>
   

2. 向 hadoop-aws 添加了排除项

   <dependency>
       <groupId>org.apache.hadoop</groupId>
       <artifactId>hadoop-aws</artifactId>
       <version>3.1.1</version>
       <exclusions>
           <exclusion>
               <groupId>com.amazonaws</groupId>
               <artifactId>aws-java-sdk-bundle</artifactId>
           </exclusion>
       </exclusions>
   </dependency>