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https://issues.apache.org/jira/browse/HDFS-6510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14026763#comment-14026763
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Yongjun Zhang commented on HDFS-6510:
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Thanks [~wheat9]!
> WebHdfs clients clears the delegation token on retry (for HA), thus failing
> retry requests
> ------------------------------------------------------------------------------------------
>
> Key: HDFS-6510
> URL: https://issues.apache.org/jira/browse/HDFS-6510
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.4.0
> Reporter: Yongjun Zhang
> Assignee: Yongjun Zhang
>
> In WebHdfs clients connected to a HA HDFS service, when a failure (that is
> inferred as a failover) happens and retry is attempted, the delegation token
> previously initialized is cleared. For token based auth, this causes all the
> subsequent retries to fail due to auth errors.
> See "delegationToken = null" in method WebHdfsFileSystem.resetStateToFailOver.
> This issue would not only show up on failover, but happens more commonly when
> the first NN specified in the config is not reachable.
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