429使用aws-sdk为s3对象生成预签名的URL时，请求过多

我有一个应用程序，它是一个数字资产管理系统。它显示缩略图。我将这些缩略图设置为可与AWS S3预签名URL一起使用：https ://docs.aws.amazon.com/AmazonS3/latest/dev/ShareObjectPreSignedURLJavaSDK.html 。这段代码一直有效，直到我更改了通过请求处理的项目数量。该应用程序具有25、50、100、200的选择。如果我选​​择100或200，则该过程将失败，并显示“错误：com.amazonaws.AmazonServiceException：请求过多（服务：null；状态代码：429；错误代码：null ;请求ID：null）“

现在的过程如下：执行搜索>通过返回该对象的预签名URL的方法运行每个对象键。

我们通过Elastic Container Service运行此应用程序，该服务允许我们通过ContainerCredentialsProvider提取凭据。

相关代码进行审查：

String s3SignedUrl(String objectKeyUrl) {
    // Environment variables for S3 client.
    String clientRegion = System.getenv("REGION");
    String bucketName = System.getenv("S3_BUCKET");

    try {
        // S3 credentials get pulled in from AWS via ContainerCredentialsProvider.
        AmazonS3 s3Client = AmazonS3ClientBuilder.standard()
                .withRegion(clientRegion)
                .withCredentials(new ContainerCredentialsProvider())
                .build();

        // Set the pre-signed URL to expire after one hour.
        java.util.Date expiration = new java.util.Date();
        long expTimeMillis = expiration.getTime();
        expTimeMillis += 1000 * 60 * 60;
        expiration.setTime(expTimeMillis);

        // Generate the presigned URL.
        GeneratePresignedUrlRequest generatePresignedUrlRequest =
                new GeneratePresignedUrlRequest(bucketName, objectKeyUrl)
                        .withMethod(HttpMethod.GET)
                        .withExpiration(expiration);

        return s3Client.generatePresignedUrl(generatePresignedUrlRequest).toString();

    } catch (AmazonServiceException e) {
        throw new AssetException(FAILED_TO_GET_METADATA, "The call was transmitted successfully, but Amazon " +
                "S3 couldn't process it, so it returned an error response. Error: " + e);
    } catch (SdkClientException e) {
        throw new AssetException(FAILED_TO_GET_METADATA, "Amazon S3 couldn't be contacted for a response, or " +
                "the client couldn't parse the response from Amazon S3. Error: " + e);
    }
}

这是我们处理项目的部分：

// Overwrite the url, it's nested deeply in maps of maps.
    for (Object anAssetList : assetList) {
        String assetId = ((Map) anAssetList).get("asset_id").toString();
        if (renditionAssetRecordMap.containsKey(assetId)) {
            String s3ObjectKey = renditionAssetRecordMap.get(assetId).getThumbObjectLocation();
            ((Map) ((Map) ((Map) anAssetList)
                    .getOrDefault("rendition_content", new HashMap<>()))
                    .getOrDefault("thumbnail_content", new HashMap<>()))
                    .put("url", s3SignedUrl(s3ObjectKey));
        }
    }

任何指导将不胜感激。希望能在AWS端实现简单且可配置的解决方案。否则，现在我正在考虑为此添加一个过程以批量生成网址。