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https://issues.apache.org/jira/browse/HDDS-12842?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17944902#comment-17944902
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Ivan Andika commented on HDDS-12842:
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For example, AWS Python SDK (boto3) will wait 1 second while waiting for the
expect header
[https://github.com/boto/botocore/blob/54daf67a1df4860e748601de434acf9f8b5c1cc8/botocore/awsrequest.py#L124]
!image-2025-04-16-10-39-33-154.png|width=368,height=265!
> Handle "Expect: 100-continue" header
> ------------------------------------
>
> Key: HDDS-12842
> URL: https://issues.apache.org/jira/browse/HDDS-12842
> Project: Apache Ozone
> Issue Type: Sub-task
> Reporter: Ivan Andika
> Assignee: Ivan Andika
> Priority: Major
> Attachments: image-2025-04-16-10-39-33-154.png
>
>
> AWS S3 SDK might send "Expect: 100-continue" header for PUT request
> (UploadObject / UploadPart) to check whether there are available space before
> sending the actual content data. For example AWS Go SDK will add the "Expect:
> 100-Continue" header when the request is larger than 2MB (or in some case if
> there is an unknown-size body).
> Currently Ozone does not handle this, we need to check whether we should
> support this. There might be some functionality or performance impact.
> We found a user that intermittently received this error
> {code:java}
> InternalError: Header expect not present in request but requested to be
> signed.\n\tstatus code: 500, request id:
> 28c2d896-d04c-4068-b854-9b036c03671f, host id: mQxBdH9Q8loGf {code}
> Links:
> *
> [https://docs.aws.amazon.com/AmazonS3/latest/API/RESTCommonRequestHeaders.html]
> * AWS Go SDK
> ** V1:
> [https://github.com/aws/aws-sdk-go/blob/main/service/s3/platform_handlers_go1.6.go]
>
> ** V2: [https://github.com/aws/aws-sdk-go-v2/pull/2051]
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