[jira] [Updated] (HDFS-8627) NPE thrown if unable to fetch token from Namenode

["J.Andreina (JIRA)" <ji...@apache.org>]

     [ 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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