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https://issues.apache.org/jira/browse/HADOOP-13526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15431543#comment-15431543
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Suraj Acharya commented on HADOOP-13526:
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@anu i tried to emulate the model present in {{AuthenticationFilter.java}}.
[Here|https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/server/AuthenticationFilter.java#L567-L571]
we can see that the debug level prints to Warn. I was not sure but I
maintained the consistency so that the user is not confused in the behaviour
pattern.
> Add detailed logging in KMS log for the authentication failure of proxy user
> ----------------------------------------------------------------------------
>
> Key: HADOOP-13526
> URL: https://issues.apache.org/jira/browse/HADOOP-13526
> Project: Hadoop Common
> Issue Type: Bug
> Components: kms
> Environment: RHEL
> Reporter: Suraj Acharya
> Assignee: Suraj Acharya
> Priority: Minor
> Attachments: HADOOP-13526.patch
>
>
> Problem :
> User A was not able to write a file to HDFS Encryption Zone. It was resolved
> by adding proxy user A in kms-site.xml
> However, the logs showed :
> {code}2016-08-10 19:32:08,954 DEBUG
> org.apache.hadoop.security.authentication.server.AuthenticationFilter:
> Request
> https://vm.example.com:16000/kms/v1/keyversion/aMxsSSKmMEzINTIrKURpFJgHnZxiOvsT9L1nMpbUoGu/_eek?eek_op=decrypt&doAs=userb&user.name=usera
> user [usera] authenticated{code}
> Possible Solution :
> So the message which says the user was successfully authenticated comes from
> {{AuthenticationFilter.java}}. However, when the filter on
> {{DelegationTokenAuthenticationFilter}} is called it hits an exception there
> and there is no log message there. This leads to the confusion that we have
> had a success while the exception happens in the next class.
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