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https://issues.apache.org/jira/browse/HDFS-3255?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13252621#comment-13252621
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Daryn Sharp commented on HDFS-3255:
-----------------------------------
I should clarify: It "works" but multiple tokens are fetched for the HA
filesystem. The reason is the {{TokenCache}} builds a map of tokens keyed on
their service. The value from {{fs.getCanonicalServiceName()}} is used to
check the map for a pre-existing token. Since the canonical service doesn't
match the value of {{token.getService()}}, it repeatedly fetches a token for a
HA filesystem.
> HA DFS returns wrong token service
> ----------------------------------
>
> Key: HDFS-3255
> URL: https://issues.apache.org/jira/browse/HDFS-3255
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: ha, hdfs client
> Affects Versions: 2.0.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Priority: Critical
> Attachments: HDFS-3255.patch
>
>
> {{fs.getCanonicalService()}} must be equal to
> {{fs.getDelegationToken(renewer).getService()}}. When HA is enabled, the DFS
> token's service is a logical uri, but {{dfs.getCanonicalService()}} is only
> returning the hostname of the logical uri.
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