[jira] [Commented] (FLINK-15561) Improve Kerberos delegation token login

["Rong Rong (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-15561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17015545#comment-17015545 ] 

Rong Rong commented on FLINK-15561:
-----------------------------------

made a simple change on issue #2 and it looks good, maybe we can verify whether this fix works:
https://github.com/walterddr/flink/commit/60240028bebc09e1d65328eb680a3a24108beb94

> Improve Kerberos delegation token login 
> ----------------------------------------
>
>                 Key: FLINK-15561
>                 URL: https://issues.apache.org/jira/browse/FLINK-15561
>             Project: Flink
>          Issue Type: Bug
>          Components: Deployment / YARN
>            Reporter: Rong Rong
>            Assignee: Rong Rong
>            Priority: Major
>              Labels: usability
>             Fix For: 1.11.0
>
>
> Currently the security HadoopModule handles delegation token login seems to be not working.
> Some improvements including: spawning a delegation token renewal thread. See: [1] https://github.com/apache/flink/blob/release-1.9/flink-runtime/src/main/java/org/apache/flink/runtime/security/modules/HadoopModule.java#L84 
> and [2] https://github.com/hanborq/hadoop/blob/master/src/core/org/apache/hadoop/security/UserGroupInformation.java#L538
> Another is to ensure delegation token is also a valid format of credential when launching YARN context. See [1] https://github.com/apache/flink/blob/master/flink-yarn/src/main/java/org/apache/flink/yarn/YarnClusterDescriptor.java#L484 and [2] https://github.com/apache/flink/blob/master/flink-runtime/src/main/java/org/apache/flink/runtime/security/modules/HadoopModule.java#L146



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