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https://issues.apache.org/jira/browse/HDFS-3980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13477495#comment-13477495
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Aaron T. Myers commented on HDFS-3980:
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Hi Brahma, can you tell me exactly what you did to generate the keytab in
question? It's unfortunately quite easy to accidentally invalidate a keytab for
a given principal if you later export another keytab including entries for the
same principal.
The fact that servicePrincipal is null is interesting, and I would guess that
it's due to having not properly configured the relevant principal setting in
your configs. One things confuses me, however: I can't find the method
KerberosUtil#getWebDfsPrincipalAndReset in any version of Hadoop that I'm aware
of. What exact version are you experiencing this with?
> NPE in HttpURLConnection.java while starting SecondaryNameNode.
> ---------------------------------------------------------------
>
> Key: HDFS-3980
> URL: https://issues.apache.org/jira/browse/HDFS-3980
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: security
> Affects Versions: 3.0.0, 2.0.1-alpha
> Reporter: Brahma Reddy Battula
> Priority: Critical
> Attachments: core-site.xml, hdfs-site.xml
>
>
> Scenario:
> ========
> I started secure cluster by going thru following..
> https://ccp.cloudera.com/display/CDHDOC/CDH3+Security+Guide..
> Here SecondaryNamenode is getting shutdown by throwing NPE..
> Please correct me If I am wrong...
> Will attach conf and logs..
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