[jira] [Updated] (HADOOP-8048) Allow merging of Credentials

["Daryn Sharp (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-8048?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daryn Sharp updated HADOOP-8048:
--------------------------------

    Attachment: HADOOP-8048.patch
    
> Allow merging of Credentials
> ----------------------------
>
>                 Key: HADOOP-8048
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8048
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: util
>    Affects Versions: 0.24.0, 0.23.1
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>         Attachments: HADOOP-8048.patch
>
>
> There is an existing {{Credentials#addAll}} which combines two {{Credentials}}, but it overwrites all existing {{Credentials}}.  There should be a {{Credentials#mergeAll}} that will not overwrite.  This will facility the cleanup of code in {{TokenCache}} denoted with:
> {code}
> //TODO: Need to come up with a better place to put
> //this block of code to do with reading the file
> {code}
> The token cache basically needs to merge the contents of a binary credentials file when it fails to find a token.  Performing the merge within {{Credentials}} is cleaner, and will break the cross-component dependency whereby the {{TokenCache}} currently has to have intimate knowledge of how the {{FileSystem}} will key tokens in the cache.

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