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https://issues.apache.org/jira/browse/HDFS-3285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13255618#comment-13255618
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Uma Maheswara Rao G commented on HDFS-3285:
-------------------------------------------
Yep, seems like a duplicate. Brahma, could you please resolve it as duplicate?
> Null pointer execption at ClientNamenodeProtocolTranslatorPB while running
> fetchdt
> -----------------------------------------------------------------------------------
>
> Key: HDFS-3285
> URL: https://issues.apache.org/jira/browse/HDFS-3285
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 2.0.0
> Reporter: Brahma Reddy Battula
> Priority: Minor
> Fix For: 2.0.0, 3.0.0
>
>
> Scenario:
> ============
> Run following command
> ./hdfs fetchdt http://******:50070 then I am getting following nullpointer
> execption
> {noformat}
> Exception in thread "main" java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getDelegationToken(ClientNamenodeProtocolTranslatorPB.java:771)
> at
> org.apache.hadoop.hdfs.DFSClient.getDelegationToken(DFSClient.java:650)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem.getDelegationToken(DistributedFileSystem.java:766)
> at
> org.apache.hadoop.hdfs.tools.DelegationTokenFetcher$1.run(DelegationTokenFetcher.java:191)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:396)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1205)
> at
> org.apache.hadoop.hdfs.tools.DelegationTokenFetcher.main(DelegationTokenFetcher.java:144)
> {noformat}
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