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https://issues.apache.org/jira/browse/PROTON-915?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14591650#comment-14591650
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Rafael H. Schloming commented on PROTON-915:
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FWIW, the intent of the spec was to allow both the client *and* the server to
send things after the header. Obviously for the server this is only feasible if
it only speaks one version, but it is allowed by the spec and should be handled
by clients.
> Incompatible protocol header handled incorrectly
> ------------------------------------------------
>
> Key: PROTON-915
> URL: https://issues.apache.org/jira/browse/PROTON-915
> Project: Qpid Proton
> Issue Type: Bug
> Components: proton-c
> Affects Versions: 0.9, 0.9.1
> Reporter: Gordon Sim
> Assignee: Rafael H. Schloming
> Priority: Blocker
> Fix For: 0.10
>
> Attachments:
> 0001-PROTON-915-Send-correct-AMQP-header-upon-protocol-mi.patch
>
>
> The correct response is to send back a supported header[1] before closing the
> socket. This worked for 0.8 but is broker from 0.9 onwards, I believe by this
> commit:
> https://git-wip-us.apache.org/repos/asf?p=qpid-proton.git;a=commit;h=1b2be03c748ef5a57cf181f8373b9b6e8f8cfd22
> It means anything relying on proton-c for protocol header handling is not
> compliant with the spec.
> [1] section 2.2 of spec: "If the requested protocol version is not
> supported, the server MUST send a protocol header with a supported protocol
> version and then close the socket."
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