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https://issues.apache.org/jira/browse/HDFS-14035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16678589#comment-16678589
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Chao Sun commented on HDFS-14035:
---------------------------------
bq. Good catch. I agree that the patch may not be doing the right thing. But it
looked that adding unit test for this seems tricky because we need a federation
+ HA setup. Also since it is known that Observer read is not currently
supporting federation, I prefer to postpone addressing this. For now I just
made it an unsupported operation in RouterClientProtocol
SG. Seems for router the state may always be active, but we'll need to think
more on this.
bq. An issue is that ClientProtocolAnswer also includes several other calls.
Changing it to HAServiceState is to indicate that all the calls are returning
HAServiceState type, only that the other calls always returns null, the syntax
still makes little sense to me.
Cool. This makes sense. Thanks.
> NN status discovery does not leverage delegation token
> ------------------------------------------------------
>
> Key: HDFS-14035
> URL: https://issues.apache.org/jira/browse/HDFS-14035
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Chen Liang
> Assignee: Chen Liang
> Priority: Major
> Attachments: HDFS-14035-HDFS-12943.001.patch,
> HDFS-14035-HDFS-12943.002.patch, HDFS-14035-HDFS-12943.003.patch,
> HDFS-14035-HDFS-12943.004.patch, HDFS-14035-HDFS-12943.005.patch,
> HDFS-14035-HDFS-12943.006.patch, HDFS-14035-HDFS-12943.007.patch,
> HDFS-14035-HDFS-12943.008.patch, HDFS-14035-HDFS-12943.009.patch,
> HDFS-14035-HDFS-12943.010.patch
>
>
> Currently ObserverReadProxyProvider uses
> {{HAServiceProtocol#getServiceStatus}} to get the status of each NN. However
> {{HAServiceProtocol}} does not leverage delegation token. So when running an
> application on YARN and when YARN node manager makes this call
> getServiceStatus, token authentication will fail, causing the application to
> fail.
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