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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13155) Implement TokenRenewer to renew and cancel delegation tokens in KMS
Date Fri, 03 Jun 2016 23:47:59 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15315117#comment-15315117
] 

Andrew Wang commented on HADOOP-13155:
--------------------------------------

LGTM +1, will commit shortly. Thanks for working on this Xiao.

Could you also add a release note about the new config requirement for renewal?

Also, should we do anything about this for Hadoop 3? For instance, deprecate and remove the
"dfs._" key in favor of the "hadoop._" key?

> Implement TokenRenewer to renew and cancel delegation tokens in KMS
> -------------------------------------------------------------------
>
>                 Key: HADOOP-13155
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13155
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Xiao Chen
>            Assignee: Xiao Chen
>         Attachments: HADOOP-13155.01.patch, HADOOP-13155.02.patch, HADOOP-13155.03.patch,
HADOOP-13155.04.patch, HADOOP-13155.05.patch, HADOOP-13155.06.patch, HADOOP-13155.07.patch,
HADOOP-13155.pre.patch
>
>
> Service DelegationToken (DT) renewal is done in Yarn by {{org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer}},
where it calls {{Token#renew}} and uses ServiceLoader to find the renewer class ([code|https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/token/Token.java#L382]),
and invokes the renew method from it.
> We seem to miss the token renewer class in KMS / HttpFSFileSystem, and hence Yarn defaults
to {{TrivialRenewer}} for DT of such kinds, resulting in the token not being renewed.
> As a side note, {{HttpFSFileSystem}} does have a {{renewDelegationToken}} API, but I
don't see it invoked in hadoop code base. KMS does not have any renew hook.



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