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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-15808) Harden Token service loader use
Date Fri, 07 Dec 2018 18:32:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-15808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16713171#comment-16713171
] 

Steve Loughran commented on HADOOP-15808:
-----------------------------------------

I've seen the exact issue I was predicting surface in the field. We don't need to care about
unloadable ID tokens except in the special case "someone is loading a token", where the fact
no token is decodable

> Harden Token service loader use
> -------------------------------
>
>                 Key: HADOOP-15808
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15808
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: security
>    Affects Versions: 2.9.1, 3.1.2
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Major
>         Attachments: HADOOP-15808-001.patch, HADOOP-15808-002.patch, HADOOP-15808-003.patch
>
>
> The Hadoop token service loading (identifiers, renewers...) works provided there's no
problems loading any registered implementation. If there's a classloading or classcasting
problem, the exception raised will stop all token support working; possibly the application
not starting.
> This matters for S3A/HADOOP-14556 as things may not load if aws-sdk isn't on the classpath.
It probably lurks in the wasb/abfs support too, but things have worked there because the installations
with DT support there have always had correctly set up classpaths.
> Fix: do what we did for the FS service loader. Catch failures to instantiate a service
provider impl and skip it



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