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Date: Wed, 30 Apr 2014 15:58:15 +0000 (UTC)
From: "Arpit Gupta (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12711487.1398872844786.207093.1398873495467@arcas>
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Subject: [jira] [Commented] (HDFS-6312) WebHdfs HA failover is broken on
 secure clusters
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    [ https://issues.apache.org/jira/browse/HDFS-6312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13985657#comment-13985657 ] 

Arpit Gupta commented on HDFS-6312:
-----------------------------------

[~daryn] in our testing with webhdfs + HA on a secure cluster we hit HADOOP-10519. I am curious what kind of job did you run that actually started running tasks.

> WebHdfs HA failover is broken on secure clusters
> ------------------------------------------------
>
>                 Key: HDFS-6312
>                 URL: https://issues.apache.org/jira/browse/HDFS-6312
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: webhdfs
>    Affects Versions: 3.0.0, 2.4.0
>            Reporter: Daryn Sharp
>            Priority: Blocker
>
> When webhdfs does a failover, it blanks out the delegation token.  This will cause subsequent operations against the other NN to acquire a new token.  Tasks cannot acquire a token (no kerberos credentials) so jobs will fail.


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