Multipart upload using AWS Java SDK hangs at 99% - amazon-web-services

Question

We are trying to upload a file of size 46GB to AWS S3. However the file upload hangs once it reaches 99%. We are using AWS java SDK for the mulitpart upload.
Following is the code which is used for multipart upload:
void startMultipartUpload(ObjectStoreAccess creds, List<Path> files) {
List<File> filenames = files.stream().map(Path::toString).map(File::new).collect(Collectors.toList());
TransferManager transferManager = transferManagerFactory.createTransferManager(creds);
List<File> filesNotUploaded = new ArrayList<>();
boolean isFileUploadSuccessful;
Integer timeElapsed;
for (File file : filenames) {
isFileUploadSuccessful = false;
timeElapsed = 0;
try {
String keyName = creds.getAwsS3TemporaryUploadCredentials().getKeyPrefix() + file.getName();
PutObjectRequest request = new PutObjectRequest(creds.getAwsS3TemporaryUploadCredentials().getBucketName(), keyName, new File(file.getPath()));
Upload upload = transferManager.upload(request);
logger.info(String.format("Starting upload for : %s ", file.getName()));
while (!upload.getState().equals(Transfer.TransferState.Completed)) {
Thread.sleep(1000);
timeElapsed++;
progressLogger.writeProgress(timeElapsed, upload.getProgress().getPercentTransferred());
}
upload.waitForCompletion();
isFileUploadSuccessful = true;
progressLogger.writeProgressStatus("...upload complete!\n");
} catch (AmazonServiceException e) {
String message = "AmazonServiceException: " + e.getMessage();
logger.error(message);
} catch (SdkClientException e) {
String message = "SdkClientException: " + e.getMessage();
logger.error(message);
} catch (InterruptedException e) {
String message = "InterruptedException: " + e.getMessage();
logger.error(message);
Thread.currentThread().interrupt();
} finally {
if (!isFileUploadSuccessful) {
String message = this.appMessages.getMessageByKey("FAIL_TO_UPLOAD_FILE") + " " + file.getPath();
logger.error(message);
filesNotUploaded.add(file);
}
}
}
}

Answer 1

Try using the AWS SDK for Java V2 and following this example that shows how to upload an object in parts. See:
https://github.com/awsdocs/aws-doc-sdk-examples/blob/master/javav2/example_code/s3/src/main/java/com/example/s3/S3ObjectOperations.java