[jira] [Commented] (HADOOP-13127) Correctly cache delegation tokens in KMSClientProvider

["Xiao Chen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-13127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15279166#comment-15279166 ] 

Xiao Chen commented on HADOOP-13127:
------------------------------------

[~asuresh], could you take a look? I attached patch 1 which I think fixes this.
Thanks in advance.

> Correctly cache delegation tokens in KMSClientProvider
> ------------------------------------------------------
>
>                 Key: HADOOP-13127
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13127
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 2.6.1
>            Reporter: Xiao Chen
>            Assignee: Xiao Chen
>         Attachments: HADOOP-13127.01.patch
>
>
> In the initial implementation of HADOOP-10770, the authToken is updated with delegation tokens during {{KMSClientProvider#addDelegationTokens }} in the following line:
> {code}
> Token<?> token = authUrl.getDelegationToken(url, authToken, renewer);
> {code}
> HADOOP-11482 is a good fix to handle UGI issue, but has a side effect in the following code:
> {code}
> public Token<?> run() throws Exception {
>   // Not using the cached token here.. Creating a new token here
>   // everytime.
>   return authUrl.getDelegationToken(url,
>     new DelegationTokenAuthenticatedURL.Token(), renewer, doAsUser);
> }
> {code}
> IIUC, we should do {{setDelegationToken}} on the authToken here to cache it.



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