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https://issues.apache.org/jira/browse/YARN-10311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17138031#comment-17138031
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Eric Yang commented on YARN-10311:
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Mapreduce.job.hdfs-servers is used for distcp job to obtain delegation token
for copy data across HDFS clusters. YARN service works with a single HDFS
cluster, and application inside the container can initialize their own
credentials login in Mapreduce client to obtain DT to another HDFS cluster.
There is no apparent reason to support access to another HDFS cluster to
request delegation token for YARN service. Sorry, the reason for this patch is
unclear to me. Can you explain the use case for this code?
> Yarn Service should support obtaining tokens from multiple name services
> ------------------------------------------------------------------------
>
> Key: YARN-10311
> URL: https://issues.apache.org/jira/browse/YARN-10311
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Bilwa S T
> Assignee: Bilwa S T
> Priority: Major
> Attachments: YARN-10311.001.patch, YARN-10311.002.patch
>
>
> Currently yarn services support single name service tokens. We can add a new
> conf called
> "yarn.service.hdfs-servers" for supporting this
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