hftp throws NPE if security is not enabled on remote cluster
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Key: HDFS-2328
URL: https://issues.apache.org/jira/browse/HDFS-2328
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 0.20.205.0
Reporter: Daryn Sharp
Priority: Critical
Fix For: 0.20.205.0
If hftp cannot locate either a hdfs or hftp token in the ugi, it will call
{{getDelegationToken}} to acquire one from the remote nn. This method may
return a null {{Token}} if security is disabled(*) on the remote nn. Hftp
will internally call its {{setDelegationToken}} which will throw a NPE when the
token is {{null}}.
(*) Actually, if any problem happens while acquiring the token it assumes
security is disabled! However, it's a pre-existing issue beyond the scope of
the token renewal changes.
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