我尝试使用Amazon-SDK(Java)示例代码S3TransferProgressSample.java将大文件上传到Amazon-S3存储(also posted here on AWS docs)。
但是，当我尝试上传11 GB的文件时，由于错误消息，上传被卡在不同的位置:
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).
看起来在发生IOException之后，SDK无法重试该请求(请参见下文)。
有人遇到吗？解决此问题的最佳实践是什么？任何代码表示赞赏。
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>
最佳答案
尝试使用low level API。
当出现问题时，这将使您有更多的控制权，因为它们可能与11GB文件有关。
往返S3的请求有时会失败。使用低级API，如果上传失败，您将可以重试其中的一部分。
重构一下Amazon文档中的示例:
// 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开发人员，所以我可能会在语法上搞砸了，但是希望这可以使您朝正确的方向前进。另外，如果上传反复失败，您将需要添加“重试计数器”以防止无限循环。