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https://issues.apache.org/jira/browse/TOREE-504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16933543#comment-16933543
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Kevin Bates commented on TOREE-504:
-----------------------------------

[~lresende] - that's probably a good idea.  I had added code in jupyter to 
still tolerate the missing version since IRKernel had the same issue (as others 
might as well), but yes, it would help with Toree's "compliance".

> Version missing from shutdown_reply header
> ------------------------------------------
>
>                 Key: TOREE-504
>                 URL: https://issues.apache.org/jira/browse/TOREE-504
>             Project: TOREE
>          Issue Type: Bug
>          Components: Kernel
>    Affects Versions: 0.3.0
>            Reporter: Kevin Bates
>            Assignee: Kevin Bates
>            Priority: Major
>             Fix For: 0.4.0
>
>
> The 5.0 Jupyter message protocol adds a {{version}} field to [message 
> headers|https://jupyter-client.readthedocs.io/en/latest/messaging.html#general-message-format].
>   However, shutdown_reply headers are not setting the protocol version.  As a 
> result, clients that adhere to the protocol can have issues when {{version}} 
> is present in the response header as an empty string, leading to noise and 
> possible incorrect behaviors following Toree's shutdown.



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