RestoreObject met MalformedXML error

[dongxiao1198]

Describe the bug

AWS SDK AWSXmlClient HTTP response code: 400
Resolved remote host IP address: 52.82.188.163
Request ID: WNC6R7167JNS40BV
Exception name: MalformedXML
Error message: Unable to parse ExceptionName: MalformedXML Message: The XML you provided was not well-formed or did not validate against our published schema
7 response headers:
connection : close
content-type : application/xml
date : Thu, 15 Jan 2026 01:51:16 GMT
server : AmazonS3
transfer-encoding : chunked
x-amz-id-2 : v2oFepqyh65PxFvrFRLJ96ddNV5eW9Nka4aTlC25B2rLWtL8KAANd0Rr8o44Ct6AVafTZkDp10k=
x-amz-request-id : WNC6R7167JNS40BV

Regression Issue

• Select this option if this issue appears to be a regression.

Expected Behavior

Restore an object from GLACIER

Current Behavior

Met error as described.

Reproduction Steps

1 archive an object to GLACIER
2 call restore for it.

Code like this:
`
Aws::S3::Model::RestoreObjectRequest request;
Aws::S3::Model::RestoreRequest restoreRequest;
restoreRequest.SetDays(1);
restoreRequest.SetTier(Aws::S3::Model::Tier::Expedited);
Aws::S3::Model::GlacierJobParameters glacierJobParameters;
// TODO why this Tier set twice?
glacierJobParameters.WithTier(Aws::S3::Model::Tier::Expedited);
restoreRequest.SetGlacierJobParameters(glacierJobParameters);

request.SetRestoreRequest(restoreRequest);
request.WithBucket(bucket()).WithKey(path);

auto outcome = client_->RestoreObject(request);

`

Possible Solution

I can not found demo or example for RestoreObject. I don't know if I'm using in a wrong way of this request.

Additional Information/Context

None

AWS CPP SDK version used

aws-sdk-cpp/1.11.352

Compiler and Version used

clang18

Operating System and version

macos

[dongxiao1198]

This error not happened after removed this line:
restoreRequest.SetTier(Aws::S3::Model::Tier::Expedited);

[sbaluja]

The code example you've provided does not compile.

Here is a minimal example/usage of the RestoreRequest operation:

int main() {
    Aws::SDKOptions opts;
    opts.loggingOptions.logLevel = Aws::Utils::Logging::LogLevel::Trace;
    Aws::InitAPI(opts);

    S3Client s3Client;

    Aws::S3::Model::RestoreRequest restoreRequest;
    restoreRequest.SetDays(1);
    restoreRequest.SetTier(Aws::S3::Model::Tier::Expedited);

    Aws::S3::Model::GlacierJobParameters glacierJobParameters;
    glacierJobParameters.WithTier(Aws::S3::Model::Tier::Expedited);
    restoreRequest.SetGlacierJobParameters(glacierJobParameters);

    Aws::S3::Model::RestoreObjectRequest request;
    request.WithBucket("test-bucket").WithKey("test-key");
    request.SetRestoreRequest(restoreRequest);

    auto outcome = s3Client.RestoreObject(request);
    if (!outcome.IsSuccess()) {
        std::cout << "Restore failed: " << outcome.GetError().GetMessage() << std::endl;
    }

    Aws::ShutdownAPI(opts);
    return 0;
}

I have tested this on SDK version 1.11.352, and do not see the error you've provided. Try the code above, or provide a working code example that compiles so I can reproduce your issue.

Also, just for reference here is the docs on this API, to answer why the tier is set on RestoreRequest and GlacierJobParameters