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https://issues.apache.org/jira/browse/HADOOP-13638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15511347#comment-15511347
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Wei-Chiu Chuang commented on HADOOP-13638:
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Here's what I did to verify the patch:

Configure a CDH Hadoop cluster using LdapGroupsMapping and KMS. The KMS ACL 
rule denies "group1" from decrypting the key. I added additional log at 
{{Groups#<init>}} to print the class name of the GroupMapping resolution 
object. Subsequently, I started KMS and do a few operations in a HDFS 
encryption zone to observe the class name printed.

> KMS should set UGI's Configuration object properly
> --------------------------------------------------
>
>                 Key: HADOOP-13638
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13638
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: kms
>            Reporter: Wei-Chiu Chuang
>            Assignee: Wei-Chiu Chuang
>         Attachments: HADOOP-13638.001.patch
>
>
> We found that the Configuration object in UGI in KMS server is not 
> initialized properly, therefore it does not load core-site.xml from 
> {{KMSConfiguration.KMS_CONFIG_DIR}}.
> This becomes a problem when the Hadoop cluster uses LdapGroupsMapping for 
> group resolution, because the UGI in KMS falls back to the default 
> JniBasedUnixGroupsMappingWithFallback (defined in core-default.xml) and is 
> thus not consistent with the Hadoop cluster.



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