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https://issues.apache.org/jira/browse/MAPREDUCE-5819?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13958275#comment-13958275
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Ted Yu commented on MAPREDUCE-5819:
-----------------------------------
TestTokenCache and TestBinaryTokenFile pass based on patch.
> Binary token merge should be done once in
> TokenCache#obtainTokensForNamenodesInternal()
> ---------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-5819
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5819
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Ted Yu
> Assignee: Ted Yu
> Priority: Minor
> Attachments: mapreduce-5819-v1.txt
>
>
> Currently mergeBinaryTokens() is called by every invocation of
> obtainTokensForNamenodesInternal(FileSystem, Credentials, Configuration) in
> the loop of obtainTokensForNamenodesInternal(Credentials, Path[],
> Configuration).
> This can be simplified so that mergeBinaryTokens() is called only once in
> obtainTokensForNamenodesInternal(Credentials, Path[], Configuration).
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