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https://issues.apache.org/jira/browse/HADOOP-2184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12543727
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Doug Cutting commented on HADOOP-2184:
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> We need to invoke a RPC (to send ticket) inside normal RPC.
I still don't get it, but, looking closer, I'm beginning to think that there's
a more fundamental problem. We shouldn't require server implementations to
call Server.setTicket(), but rather they should just be able to call
Server.getTicket() within server method implementations, with the ticket
automatically set by the framework.
Maybe we should just add a Ticket field to Invocation. Then the Client can
pass the proxy's ticket with the call, as an invisible parameter. When a
call's ticket is non-null, this will perform a setTicket on the connection,
making it visible to the server. The client could then be optimized to only
send the ticket for the first call on a connection, and leave it null
thereafter. Would that work?
We might also add a Proxy.setTicket(Ticket) method that sets or resets the
ticket for all future requests on that proxy.
> RPC Support for user permissions and authentication.
> ----------------------------------------------------
>
> Key: HADOOP-2184
> URL: https://issues.apache.org/jira/browse/HADOOP-2184
> Project: Hadoop
> Issue Type: New Feature
> Components: ipc
> Affects Versions: 0.15.0
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Raghu Angadi
> Fix For: 0.16.0
>
> Attachments: HADOOP-2184-demo.patch
>
>
> Update 11/13/2007: What is proposed for 0.16.0 :
> The client can set a user ticket (as defined in HADOOP-1701) for each
> connection and that ticket is made available to RPC calls at the server. The
> client can replace the ticket at any time. The main advantage is that rest of
> the the client RPCs don't need to be aware of the user tickets.
> What RPC would ideally support in future :
> In the current version of RPC, there is no authentication or data protection.
> We propose to change the RPC framework, so that secure communication is
> possible.
> The new RPC should:
> - Compatible with current RPC
> - Allow a pluggable security implementations (see HADOOP-1701)
> - Support both secure and non-secure modes.
> Here is a rough idea:
> - Store security information (e.g. username, keys) in a ticket
> - Use the ticket to establish a RPC connection
> - Create secure sockets by the (subclass of) SocketFactory corresponding to
> the selected security implementations
> - Send the data and RPC parameters with the secure sockets
> When authentication is supported, the RPC callee should also initialize
> caller information during RPC setup and execute the RPC on the caller's
> behalf.
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