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https://issues.apache.org/jira/browse/HDFS-14035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16684433#comment-16684433
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Chen Liang commented on HDFS-14035:
-----------------------------------
Thanks for the review [~shv]! The failed test TestConsistentReadsObserver is
related. Turns out a side effect of using client protocol to discover server
state is that the call to {{changeProxy}} could potentially updating client
alignment context state id to most recent, if talked to active, introducing a
race condition to {{testMsyncSimple}}. Post v0013 patch to resolve this.
> 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
>
>
> 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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