jackye1995 commented on pull request #2807:
URL: https://github.com/apache/iceberg/pull/2807#issuecomment-931548031
Had some offline discussion with @danielcweeks, and we are exploring why SDK
V2 could not achieve the goal. It seems that we can still set header through:
```
s3.putObject(PutObjectRequest.builder()
.bucket(bucketName)
.key(objectKey)
.overrideConfiguration(AwsRequestOverrideConfiguration.builder()
.putHeader("If-None-Match", "*")
.build())
.build());
```
The SDK V1 just has that as a util method in `ObjectMetadata`, all the user
metadata are just headers that has prefix `x-amz-meta-` based on
https://docs.aws.amazon.com/AmazonS3/latest/userguide/UsingMetadata.html.
Could you validate if that is the case? If we can set headers like this, can
we move to implement this through the V2 SDK? @mechgouki
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