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From "Larry McCay (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-3890) Use of CredentialProvider results in a lot of NN ops
Date Mon, 08 Jun 2015 19:58:00 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-3890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14577742#comment-14577742
] 

Larry McCay commented on ACCUMULO-3890:
---------------------------------------

HADOOP-10833 only removed it from the UserProvider apparently.
We can either add it back in for the JavaKeyStoreProvider or remove the remnants of the previous
implementation.

Let me know which way you would like to go and I will file a jira for that work.
We may have to move quickly if we want it in 2.7.1 or we may have missed the window.

> Use of CredentialProvider results in a lot of NN ops
> ----------------------------------------------------
>
>                 Key: ACCUMULO-3890
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3890
>             Project: Accumulo
>          Issue Type: Bug
>    Affects Versions: 1.6.1, 1.6.2, 1.7.0
>            Reporter: Billie Rinaldi
>            Assignee: Billie Rinaldi
>             Fix For: 1.6.3, 1.7.1, 1.8.0
>
>
> Every time we access a sensitive property or iterate over a configuration when there
is a CredentialProvider configured, it results in NN operations (as evidenced by FSNamesystem.audit
logs).  I think that we could assume the CredentialProvider is static, read its properties
once and cache them in memory to avoid these unnecessary reads.



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