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https://issues.apache.org/jira/browse/HADOOP-6419?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12828308#action_12828308
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Kan Zhang commented on HADOOP-6419:
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bq. Hmm. Are we worried this is short-sighted?
Allen, I think there might be some terminology mismatch here. I take Philip's
"protocol" to mean "authentication method". For a particular method, there is
usually only one mechanism that implements that method. However, we do support
multiple authentication methods on the same Hadoop protocol. Did I answer your
question?
> Change RPC layer to support SASL based mutual authentication
> ------------------------------------------------------------
>
> Key: HADOOP-6419
> URL: https://issues.apache.org/jira/browse/HADOOP-6419
> Project: Hadoop Common
> Issue Type: New Feature
> Components: security
> Reporter: Kan Zhang
> Assignee: Kan Zhang
> Attachments: c6419-26.patch, c6419-39.patch, c6419-45.patch,
> c6419-66.patch, c6419-67.patch, c6419-69.patch, c6419-70.patch, c6419-72.patch
>
>
> The authentication mechanism to use will be SASL DIGEST-MD5 (see RFC-2222 and
> RFC-2831) or SASL GSSAPI/Kerberos. Since J2SE 5, Sun provides a SASL
> implementation by default. Both our delegation token and job token can be
> used as credentials for SASL DIGEST-MD5 authentication.
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