我试图上传一个CSV文件的约5 Mb大小到亚马逊S3使用low-level api使用java SDK。
我在下面提到的错误：.
com.amazonaws.services.s3.model.AmazonS3Exception:指定的上载不存在。上载ID可能无效，或者上载可能已中止或完成。（服务：Amazon S3;验证码：错误代码：NoSuchUpload;请求ID：）
你能告诉我哪里出了问题吗？我使用的是us-west-1区域。

List<PartETag> partETags = new ArrayList<PartETag>();
    InitiateMultipartUploadRequest initRequest = new 
    InitiateMultipartUploadRequest(tempVariableBucketName, tempVariableAccessKey);
    InitiateMultipartUploadResult initResponse = s3Client.initiateMultipartUpload(initRequest);

    long contentLength = is.available();
    long partSize = 1 * 1024 * 1024; // Set part size to 1 MB.

    try {
        long filePosition = 0;
        for (int i = 1; filePosition < contentLength; i++) {
            partSize = Math.min(partSize, (contentLength - filePosition));
            logger.info("Upload Id " + initResponse.getUploadId());
            UploadPartRequest uploadRequest = new UploadPartRequest()
                .withBucketName(tempVariableBucketName).withKey(fileName)
                .withUploadId(initResponse.getUploadId()).withPartNumber(i)
                .withFileOffset(filePosition)
                .withInputStream(is)
                .withPartSize(partSize);

            partETags.add(s3Client.uploadPart(uploadRequest).getPartETag());
            filePosition += partSize;
        }
        CompleteMultipartUploadRequest compRequest = new CompleteMultipartUploadRequest(tempVariableBucketName,tempVariableAccessKey,initResponse.getUploadId(),partETags);
        s3Client.completeMultipartUpload(compRequest);
    } catch (Exception e) {
        logger.error(e.getMessage());
        s3Client.abortMultipartUpload(new AbortMultipartUploadRequest(tempVariableBucketName, tempVariableAccessKey, initResponse.getUploadId()));
        throw e;
    }