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https://issues.apache.org/jira/browse/HDFS-14545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17880228#comment-17880228
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chuanjie.duan commented on HDFS-14545:
--------------------------------------
RouterUserProtocol.java
public void refreshSuperUserGroupsConfiguration() throws IOException {
*_LOG_*.debug("Refresh superuser groups configuration in Router.");
rpcServer.checkOperation({_}OperationCategory{_}.*_UNCHECKED_*);
Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
if (nss.isEmpty()) {
ProxyUsers.{_}refreshSuperUserGroupsConfiguration{_}();
} else {
RemoteMethod method = new RemoteMethod(RefreshUserMappingsProtocol.class,
"refreshSuperUserGroupsConfiguration");
rpcClient.invokeConcurrent(nss, method);
{color:#FF0000}ProxyUsers{color}{color:#FF0000}.{_}refreshSuperUserGroupsConfiguration{_}();{color}
}
}
[~elgoiri] [~ayushtkn] , I would like to add a red line here, because after
executing "hdfs dfsadmin -Dfs.defaultFS=hdfs://router-fed
-refreshSuperUserGroupsConfiguration", although the backend Namenode has
updated the ProxyUsers, the Router still prompts that it cannot proxy. This is
confusing and hard to understand. Although the Router's ProxyUsers can be
refreshed through the "hdfs dfsrouteradmin
-refreshSuperUserGroupsConfiguration" method from HDFS-14983, it still requires
two steps. In addition, the nss empty scenario is also troubling. If the Router
is not listening to the Namenode, then what's the use of proxying?
> RBF: Router should support GetUserMappingsProtocol
> --------------------------------------------------
>
> Key: HDFS-14545
> URL: https://issues.apache.org/jira/browse/HDFS-14545
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Íñigo Goiri
> Assignee: Ayush Saxena
> Priority: Major
> Fix For: 3.3.0, HDFS-13891
>
> Attachments: HDFS-14545-HDFS-13891-01.patch,
> HDFS-14545-HDFS-13891-02.patch, HDFS-14545-HDFS-13891-03.patch,
> HDFS-14545-HDFS-13891-04.patch, HDFS-14545-HDFS-13891-05.patch,
> HDFS-14545-HDFS-13891-06.patch, HDFS-14545-HDFS-13891-07.patch,
> HDFS-14545-HDFS-13891-08.patch, HDFS-14545-HDFS-13891-09.patch,
> HDFS-14545-HDFS-13891-10.patch, HDFS-14545-HDFS-13891.000.patch
>
>
> We should be able to check the groups for a user from a Router.
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