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https://issues.apache.org/jira/browse/HADOOP-12548?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15144931#comment-15144931
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Matthew Paduano commented on HADOOP-12548:
------------------------------------------

I want to clarify my comment.  Upon more careful debugging, certain typos are 
caught and messaged appropriately.  The initial typo I tried did not.   It 
depends on where in the URL one happens to munge the string.   The issue does 
not seem to be related to the code in this patch.

I am using a test command with an option:

-Dhadoop.security.credential.provider.path=*jceks*://*hdfs*@localhost:9000*/user/mattp/aws.jceks*

there are (at least) three possible places one might mistype.   An error in the 
protocol or the filesystem scheme will be caught/notified appropriately.  But 
an error in the HDFS filename itself (the last portion of the above string) 
does not.   I did not track it down, but it may be a feature/bug in the conf 
processing code(?).

> read s3 creds from a Credential Provider
> ----------------------------------------
>
>                 Key: HADOOP-12548
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12548
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: fs/s3
>            Reporter: Allen Wittenauer
>            Assignee: Larry McCay
>         Attachments: CredentialProviderAPIforS3FS-002.pdf, 
> HADOOP-12548-01.patch, HADOOP-12548-02.patch, HADOOP-12548-03.patch, 
> HADOOP-12548-04.patch, HADOOP-12548-05.patch, HADOOP-12548-06.patch, 
> HADOOP-12548-07.patch
>
>
> It would be good if we could read s3 creds from a source other than via a 
> java property/Hadoop configuration option



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