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https://issues.apache.org/jira/browse/HADOOP-13155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15291654#comment-15291654
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Arun Suresh commented on HADOOP-13155:
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Thanks for taking this up [~xiaochen]..
IIRC, the reason why we had not implemented the renewer for KMS was that we
were catering to {{FileSystem}} and {{DistributedFileSystem}} API which at that
point had only an {{addDelegationTokens()}}.
So, I guess it is a good idea to add a Renewer for KMS-DTs. Will go over you
patch in more detail over the weekend.
bq. Since looks like MiniKMS is setup with PseudoAuthenticationHandler by
default (didn't find a way to configure auth type before starting MiniKMS.
I remember testing KMS via {{TestKMS}} using the
{{KerberosDelegationTokenAuthenticationHandler}}. Take a look at
{{TestKMS::testStartStop}} method where we do a
{{conf.set("hadoop.kms.authentication.type", "kerberos")}} before running the
KMS server.
> Implement TokenRenewer in KMS and HttpFS
> ----------------------------------------
>
> 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.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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