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https://issues.apache.org/jira/browse/HDFS-14035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16685620#comment-16685620
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Chen Liang commented on HDFS-14035:
-----------------------------------
Discussed with [~xkrogen] offline, seems we can also resolve race condition in
the unit test, but avoid using sleep, by making an uncoordinated call to server
early. This will initialize the observer proxy and also sets the state id on
client side. Post v014 patch, also added a couple missing javadoc.
> 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, HDFS-14035-HDFS-12943.011.patch,
> HDFS-14035-HDFS-12943.012.patch, HDFS-14035-HDFS-12943.013.patch,
> HDFS-14035-HDFS-12943.014.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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