[jira] [Commented] (HADOOP-12510) Need improved WARN or ERROR when token based auth fails for kmsclient request

["Todd Grayson (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-12510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14986104#comment-14986104 ] 

Todd Grayson commented on HADOOP-12510:
---------------------------------------

Herein lies the rub; the kerberos authentication was the fallback from the token auth failing, the token auth failing was "invisible" from a scanning the logs perspective? 

The comment being, we should not be seeing kerberos auth at that moment, as its an indication of a complete failure of the token authentication... so I guess the ask is that token auth go out with a bang in the logs before things fail back to kerberos authentication which will always fail in that context. 

> Need improved WARN or ERROR when token based auth fails for kmsclient request
> -----------------------------------------------------------------------------
>
>                 Key: HADOOP-12510
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12510
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: security
>            Reporter: Todd Grayson
>
> When token based authentication fails, it would be helpful to have a WARN event of the failure, as well as a WARN event that alternative forms of authentication are being attempted.
> For example if token based authentication has failed; it appears that there is a fallback to attempting kerberos authentication.   At that point the most prominent logging is a kerberos GSS error, when the actual issue was a failure at the token evaluation of a client access request to an HDFS encrypted zone. 
> In the example below we are presented with a kerberos error, but the actual error was a failure of token authorization in an unexpected way.
> {code}
> 15/08/27 07:35:35 INFO mapreduce.Job: Task Id : attempt_1440594773177_0021_m_000009_0, Status : FAILED 
> org.apache.hadoop.security.authentication.client.AuthenticationException: GSSException: No valid credentials provided (Mechanism level: Failed to find any Kerberos tgt) 
> java.io.IOException: org.apache.hadoop.security.authentication.client.AuthenticationException: GSSException: No valid credentials provided (Mechanism level: Failed to find any Kerberos tgt) 
> at 
> {code}



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