Metadata will be lost when using s3TransferManager to copy large file

[SinnoSong]

Describe the bug

I have a large file(2.5GB), I use S3TransferManager copy the object to another key.

Expected Behavior

A new file will be created, and the new file contains original metadata.

Current Behavior

The new file be created, but it does not have the original metadata.

Reproduction Steps

Here is my code:

CopyObjectRequest request = CopyObjectRequest.builder().sourceBucket(bucket).sourceKey(key)
                .destinationBucket(destinationBucket).destinationKey(newKey).metadataDirective(MetadataDirective.COPY).build();
        var copyRequest = CopyRequest.builder().copyObjectRequest(request).build();
        s3TransferManager.copy(copyRequest).completionFuture().join();

Possible Solution

No response

Additional Information/Context

No response

AWS Java SDK version used

2.25.16
aws-crt used version 0.29.13

JDK version used

jdk17

Operating System and version

aws lambda java17

[zoewangg]

Hi @SinnoSong, this is the expected behavior.

Note that for multipart copy request, existing metadata stored in the source object is NOT copied to the destination object; if required, you can retrieve the metadata from the source object and set it explicitly in the @link CopyObjectRequest.Builder#metadata(Map)}.

https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/transfer/s3/S3TransferManager.html#copy(software.amazon.awssdk.transfer.s3.model.CopyRequest)

[SinnoSong]

@zoewangg Thank you.

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