Benoy Antony commented on HDFS-10735:

[~arpitagarwal], Thanks for the review. Since the issue happens when 
interacting with an older version of HDFS, it will be difficult to test.
If there are no further comments, I'll commit this in a couple of days.

> Distcp using webhdfs on secure HA clusters fails with StandbyException
> ----------------------------------------------------------------------
>                 Key: HDFS-10735
>                 URL: https://issues.apache.org/jira/browse/HDFS-10735
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: webhdfs
>    Affects Versions: 2.7.2
>            Reporter: Benoy Antony
>            Assignee: Benoy Antony
>             Fix For: 2.8.0
>         Attachments: HDFS-10735-001.patch, exception.txt
> A distcp running on HADOOP 2.7.2 cluster , copying from HADOOP 2.4.1 cluster 
> fails.
> Both are secure clusters.
> The logs indicates that task contacts the StandBy name node on the remote 
> cluster is contacted first and gets a standByException. 
> Instead of retrying with the active name node on the remote cluster, the 
> execution errors out throwing InvalidToken
> The exception is attached

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