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From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-10173) Remove UGI from DIGEST-MD5 SASL server creation
Date Thu, 19 Dec 2013 18:39:07 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-10173?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Daryn Sharp updated HADOOP-10173:
---------------------------------

    Attachment: HADOOP-10173.patch

Only use {{UGI.doAs}} for kerberos, not tokens.  No tests because {{TestSaslRPC}} already
proves the changes are sound.

> Remove UGI from DIGEST-MD5 SASL server creation
> -----------------------------------------------
>
>                 Key: HADOOP-10173
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10173
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: ipc
>    Affects Versions: 0.23.0, 3.0.0, 2.4.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>            Priority: Critical
>         Attachments: HADOOP-10173.patch
>
>
> Instantiation of SASL server instances within the readers threads is performed within
a {{UGI.getCurrentUser().doAs}}.  {{getCurrentUser}} is synchronized, and doAs also degrades
performance.  GSSAPI (kerberos) requires instantiation within a doAs, but DIGEST-MD5 (token)
does not.



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