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https://issues.apache.org/jira/browse/HADOOP-14295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer updated HADOOP-14295:
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Fix Version/s: (was: 3.0.0-alpha2)
> Authentication proxy filter may fail authorization because of getRemoteAddr
> ---------------------------------------------------------------------------
>
> Key: HADOOP-14295
> URL: https://issues.apache.org/jira/browse/HADOOP-14295
> Project: Hadoop Common
> Issue Type: Bug
> Components: common
> Affects Versions: 2.7.4, 3.0.0-alpha2, 2.8.1
> Reporter: Jeffrey E Rodriguez
> Assignee: Jeffrey E Rodriguez
> Priority: Critical
> Attachments: hadoop-14295.001.patch, HADOOP-14295.002.patch,
> HADOOP-14295.003.patch, HADOOP-14295.004.patch
>
>
> When we turn on Hadoop UI Kerberos and try to access Datanode /logs the proxy
> (Knox) would get an Authorization failure and it hosts would should as
> 127.0.0.1 even though Knox wasn't in local host to Datanode, error message:
> {quote}
> "2017-04-08 07:01:23,029 ERROR security.AuthenticationWithProxyUserFilter
> (AuthenticationWithProxyUserFilter.java:getRemoteUser(94)) - Unable to verify
> proxy user: Unauthorized connection for super-user: knox from IP 127.0.0.1"
> {quote}
> We were able to figure out that Datanode have Jetty listening on localhost
> and that Netty is used to server request to DataNode, this was a measure to
> improve performance because of Netty Async NIO design.
> I propose to add a check for x-forwarded-for header since proxys usually
> inject that header before we do a getRemoteAddr
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