Wei-Chiu Chuang commented on HADOOP-13548:

This fix is certainly not as crisp as I'd like it to be, but it solves the 
problem. [~anu] [~lmccay] may I ask for your review? Thanks!

> Remove recursive dependencies of credential providers in LdapGroupsMapping
> --------------------------------------------------------------------------
>                 Key: HADOOP-13548
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13548
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 2.6.0
>            Reporter: Wei-Chiu Chuang
>            Assignee: Wei-Chiu Chuang
>         Attachments: HADOOP-13548.001.patch, HADOOP-13548.002.patch
> HADOOP-11934 discovered an infinite loop of dependencies in the use of 
> credential provider in LdapGroupsMapping. It added a new localjceks:// URI to 
> workaround the problem. The assumption is that the groups mapping is used 
> only in NameNode and that using a local credential file is not a problem.
> However, there are cases where Hadoop clients, such as Sqoop, may use hdfs:// 
> based credential provider and use LdapGroupsMapping at the same time. We 
> should use HADOOP-12846 to exclude hdfs:// URI credential providers.

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