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https://issues.apache.org/jira/browse/HADOOP-8784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13452563#comment-13452563
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Daryn Sharp commented on HADOOP-8784:
-------------------------------------
Sending a token to an older insecure cluster is compatible because the older
server kicks the client out of SASL mode.
> Improve IPC.Client's token use
> ------------------------------
>
> Key: HADOOP-8784
> URL: https://issues.apache.org/jira/browse/HADOOP-8784
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: ipc, security
> Affects Versions: 2.0.0-alpha, 3.0.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
>
> If present, tokens should be sent for all auth types including simple auth.
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