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https://issues.apache.org/jira/browse/HADOOP-13548?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15437125#comment-15437125
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Allen Wittenauer commented on HADOOP-13548:
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bq. The assumption is that the groups mapping is used only in NameNode and that
using a local credential file is not a problem.
Group mapping is used all over the place just in Hadoop due to the ACL system
in hadoop-common! Argh!
> 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
>
> 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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