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https://issues.apache.org/jira/browse/DERBY-4786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12907662#action_12907662
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Kathey Marsden commented on DERBY-4786:
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Hi Mamta, I will look at the patch today but to answer your question, I think
the behavior you have is fine with existing old versions but we should
backport the recognition of level 2 protocol to the early branches so users
running on the latest version on the branch, won't see the error. I think we
should be careful to document that moving forward, instead of changing existing
commands, new API's should create a new COMMAND_XXX command instead of bumping
the protocol version. Maybe a big code comment around PROTOCOL_VERSION would
be a good place to put this.
It would be good to have some sort of automated test for this. The comments in
DERBY-3644 seem to indicate that the compatibility tests exposed the problem.
Are those still run anywhere?
> Shutdown command without username and password should work with mixed client
> and network server releases.
> ---------------------------------------------------------------------------------------------------------
>
> Key: DERBY-4786
> URL: https://issues.apache.org/jira/browse/DERBY-4786
> Project: Derby
> Issue Type: Bug
> Components: Network Client, Network Server
> Affects Versions: 10.4.1.3, 10.4.2.0, 10.5.1.1, 10.6.1.0
> Reporter: Mamta A. Satoor
> Assignee: Mamta A. Satoor
> Attachments: DERBY4786_patch1_diff.txt, DERBY4786_patch2_diff.txt
>
>
> DERBY-2109 introduced optional parameters username and password to the
> shutdown command. But with this fix, the existing shutdown command which does
> not use username and password stopped working from client with DERBY-2109
> changes against a network server without DERBY-2109 changes.
> This jira is to ensure that existing shutdown command without user name and
> password still works fine between different releases of client and network
> server(with or without DERBY-2109). The new shutdown command introduced by
> DERBY-2109 will work obviosuly only on client and server with DERBY-2109
> changes. For client/server not with DERBY-2109 changes attempting to user use
> name and password will get an error.
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