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https://issues.apache.org/jira/browse/HDFS-8627?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
J.Andreina updated HDFS-8627:
-----------------------------
Status: Patch Available (was: Open)
> NPE thrown if unable to fetch token from Namenode
> -------------------------------------------------
>
> Key: HDFS-8627
> URL: https://issues.apache.org/jira/browse/HDFS-8627
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: J.Andreina
> Assignee: J.Andreina
> Attachments: HDFS-8627.1.patch
>
>
> DelegationTokenFetcher#saveDelegationToken
> Missed to check if token is null.
> {code}
> Token<?> token = fs.getDelegationToken(renewer);
> Credentials cred = new Credentials();
> cred.addToken(token.getKind(), token);
> {code}
> {noformat}
> XXXXXXXXXXXXXXXXXX:~/hadoop/namenode/bin> ./hdfs fetchdt --renewer Rex
> /home/REX/file1
> Exception in thread "main" java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.tools.DelegationTokenFetcher.saveDelegationToken(DelegationTokenFetcher.java:181)
> at
> org.apache.hadoop.hdfs.tools.DelegationTokenFetcher$1.run(DelegationTokenFetcher.java:126)
> at
> java.security.AccessController.doPrivileged(AccessController.java:314)
> at javax.security.auth.Subject.doAs(Subject.java:572)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1666)
> at
> org.apache.hadoop.hdfs.tools.DelegationTokenFetcher.main(DelegationTokenFetcher.java:114)
> {noformat}
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