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https://issues.apache.org/jira/browse/HADOOP-12969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15215775#comment-15215775
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Steve Loughran commented on HADOOP-12969:
-----------------------------------------
IPC client is used in YARN apps as it gives you kerberos IPC;
You can't do REST to a YARN app as the RM proxy gets in the way. So it's Hadoop
RPC or roll your own non-kerberized IPC mechanism.
> Mark IPC.Client and IPC.Server as @Public, @Evolving
> ----------------------------------------------------
>
> Key: HADOOP-12969
> URL: https://issues.apache.org/jira/browse/HADOOP-12969
> Project: Hadoop Common
> Issue Type: Improvement
> Components: ipc
> Affects Versions: 2.8.0
> Reporter: Xiaobing Zhou
> Assignee: Xiaobing Zhou
> Priority: Minor
>
> Per the discussion in
> [HADOOP-12909|https://issues.apache.org/jira/browse/HADOOP-12909?focusedCommentId=15211745&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15211745],
> this is to propose marking IPC.Client and IPC.Server as @Public, @Evolving
> as a result of HADOOP-12909
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