將大文件上傳到 Amazon S3 時的問題

Question

我嘗試使用 Amazon-SDK(Java) 示例代碼S3TransferProgressSample.java將大文件上傳到 Amazon-S3 存儲（ 也在此處發布在 AWS 文檔上）。

但是當我嘗試上傳 11 GB 文件時，上傳在不同的點卡住並顯示錯誤消息：

Unable to upload file to Amazon S3: Unable to upload part: Unable toexecute HTTP request: Unbuffered entity enclosing request can not be repeated " (attached screenshot). 

看起來 IOException 發生后 SDK 無法重試請求（見下文）。

有沒有人遇到這個？ 解決此問題的最佳做法是什么？ 任何代碼表示贊賞。

 INFO: Received successful response: 200, AWS Request ID:
 2B66E7669E24DA75<br> Jan 15, 2011 6:44:46 AM
 com.amazonaws.http.HttpClient execute<br> INFO: Sending Request: PUT
 s3.amazonaws.com /test_file_upload/autogenerated.txt Parameters:
 (uploadId:
     m9MqxzD484Ys1nifnX._IzJBGbCFIoT_zBg0xdd6kkZ4TAtmcG0lXQOE.LeiSEuqn6NjcosIQLXJeKzSnKllmw--, partNumber: 1494, )<br> Jan 15, 2011 6:45:10 AM
     org.apache.commons.httpclient.HttpMethodDirector executeWithRetry<br>
     **INFO: I/O exception (java.net.SocketException) caught when processing request: Connection reset by peer: socket write error**<br>
     Jan 15, 2011 6:45:10 AM
     org.apache.commons.httpclient.HttpMethodDirector executeWithRetry<br>
     INFO: Retrying request<br> Jan 15, 2011 6:45:12 AM
     com.amazonaws.http.HttpClient execute<br> WARNING: Unable to execute
     HTTP request: Unbuffered entity enclosing request can not be
     repeated.<br> Jan 15, 2011 6:45:12 AM
     org.apache.commons.httpclient.HttpMethodDirector executeWithRetry<br>
     **INFO: I/O exception (java.net.SocketException) caught when processing request: Connection reset by peer: socket write error**<br>
     Jan 15, 2011 6:45:12 AM
     org.apache.commons.httpclient.HttpMethodDirector executeWithRetry<br>
     INFO: Retrying request<br> Jan 15, 2011 6:45:13 AM
     org.apache.commons.httpclient.HttpMethodDirector executeWithRetry<br>
     **INFO: I/O exception (java.net.SocketException) caught when processing request: Connection reset by peer: socket write error**<br>
     Jan 15, 2011 6:45:13 AM
     org.apache.commons.httpclient.HttpMethodDirector executeWithRetry<br>
     INFO: Retrying request<br> Jan 15, 2011 6:45:13 AM
     com.amazonaws.http.HttpClient execute<br>
     **WARNING: Unable to execute HTTP request: Unbuffered entity enclosing request can not be repeated.**<br> Jan 15, 2011 6:45:14 AM
     com.amazonaws.http.HttpClient execute<br> WARNING: Unable to execute
     HTTP request: Unbuffered entity enclosing request can not be
     repeated.<br> Jan 15, 2011 6:45:14 AM com.amazonaws.http.HttpClient
     execute<br> WARNING: Unable to execute HTTP request: Unbuffered entity
     enclosing request can not be repeated.<br> Jan 15, 2011 6:45:14 AM
     com.amazonaws.http.HttpClient execute<br> WARNING: Unable to execute
     HTTP request: Unbuffered entity enclosing request can not be
     repeated.<br> Jan 15, 2011 6:45:15 AM com.amazonaws.http.HttpClient
     execute<br> WARNING: Unable to execute HTTP request: Unbuffered entity
     enclosing request can not be repeated.<br> Jan 15, 2011 6:45:16 AM
     com.amazonaws.http.HttpClient execute<br> WARNING: Unable to execute
     HTTP request: Unbuffered entity enclosing request can not be
     repeated.<br> Jan 15, 2011 6:45:16 AM

 com.amazonaws.http.HttpClient
     execute<br> WARNING: Unable to execute HTTP request: Unbuffered entity
     enclosing request can not be repeated.<br> Jan 15, 2011 6:45:17 AM
     com.amazonaws.http.HttpClient execute<br> WARNING: Unable to execute
     HTTP request: Unbuffered entity enclosing request can not be
     repeated.<br> Jan 15, 2011 6:45:19 AM com.amazonaws.http.HttpClient
     execute<br> WARNING: Unable to execute HTTP request: Unbuffered entity
     enclosing request can not be repeated.<br> Jan 15, 2011 6:45:19 AM
     com.amazonaws.http.HttpClient execute<br> ....<br> Jan 15, 2011
     6:45:21 AM com.amazonaws.http.HttpClient handleResponse<br>
     **INFO: Received successful response: 204, AWS Request ID: E794B8FCA4C3D007**<br> Jan 15, 2011 6:45:21 AM
     com.amazonaws.http.HttpClient execute<br> ...<br> Jan 15, 2011 6:45:19
     AM com.amazonaws.http.HttpClient execute<br> INFO: Sending Request:
     DELETE s3.amazonaws.com /test_file_upload/autogenerated.txt
     Parameters:<br> ...<br> Jan 15, 2011 6:47:01 AM
     com.amazonaws.http.HttpClient handleErrorResponse<br> INFO: Received
     error response: Status Code: 404, AWS Request ID: 0CE25DFE767CC595,
     AWS Error Code: NoSuchUpload, AWS Error Message: The specified upload
     does not exist. The upload ID may be invalid, or the upload may have
     been aborted or completed.<br>

Answer 1

嘗試使用低級 API 。

當出現問題時，這將使您有更多的控制權，因為它們可能與 11GB 的文件有關。

進出 S3 的請求有時會失敗。 使用低級 API，如果上傳失敗，您將能夠重試上傳的一部分。

稍微重構 Amazon 文檔中的示例：

// Step 2: Upload parts.
long filePosition = 0;
for (int i = 1; filePosition < contentLength; i++) {
    // Last part can be less than 5 MB. Adjust part size.
    partSize = Math.min(partSize, (contentLength - filePosition));

    // Create request to upload a part.
    UploadPartRequest uploadRequest = new UploadPartRequest()
                .withBucketName(existingBucketName).withKey(keyName)
                .withUploadId(initResponse.getUploadId()).withPartNumber(i)
                .withFileOffset(filePosition)
                .withFile(file)
                .withPartSize(partSize);

    // repeat the upload until it succeeds.
    boolean anotherPass;  
        do {
              anotherPass = false;  // assume everythings ok
              try {
                  // Upload part and add response to our list.
                  partETags.add(s3Client.uploadPart(uploadRequest).getPartETag());
              } catch (Exception e) {
                    anotherPass = true; // repeat
              }
        } while (anotherPass);

     filePosition += partSize;
}

   // Step 3: complete.
   CompleteMultipartUploadRequest compRequest = new 
                     CompleteMultipartUploadRequest(
                                existingBucketName, 
                                keyName, 
                                initResponse.getUploadId(), 
                                partETags);

   s3Client.completeMultipartUpload(compRequest);

注意：我不是 Java 開發人員，所以我可能會在語法上搞砸，但希望這能讓你朝着正確的方向前進。 此外，如果上傳反復失敗，您將需要添加一個“重試計數器”以防止無限循環。

Answer 2

附帶說明一下，如果您嘗試對已在分段上傳下的密鑰進行分段上傳，則可能會引發 404 錯誤。

Answer 3

我認為您應該嘗試 AWS 支持的 Multipart API。

看看這個： http : //docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/s3/transfer/TransferManager.html

Answer 4

我想對 Geoff Appleford 的回答添加評論，但 SO 不允許我這樣做。 一般來說，他使用低級 API 的答案工作正常，但即使我們現在有一個 do-while 循環，for 循環的設計方式也有內置的重試邏輯。 在他的代碼片段中，文件位置僅在成功時才會增加，否則您將再次上傳同一部分。

Answer 5

Geoff Appleford 的回答對我有用。 但是，我會在 while 循環控制語句中添加 && retryCount < MAX_RETRIES，並在 while 中捕獲的每個異常上增加 retryCount。

阿維亞德