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https://issues.apache.org/jira/browse/HADOOP-7602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13095654#comment-13095654
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Daryn Sharp commented on HADOOP-7602:
-------------------------------------
The method {{build(D)elegation(T)okenServiceAuthority}} is specifically meant
for use by tokens. The client uses {{buildDTServiceAuthority}} to set the
service in a token. The service is what the RPC layer matches against to find
a token for new connections.
If {{buildDTServiceAuthority}} ever returns an empty string, then the token is
rendered useless. The logs will show that a token was acquired, but
connections will mysteriously fail because an empty string doesn't match the
address of the connection.
The 1-line fix for the real problem is equally as minimal as reintroducing a
bug to mask another bug.
> wordcount, sort etc on har files fails with NPE
> -----------------------------------------------
>
> Key: HADOOP-7602
> URL: https://issues.apache.org/jira/browse/HADOOP-7602
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 0.20.205.0, 0.20.206.0
> Reporter: John George
> Assignee: John George
> Fix For: 0.20.205.0
>
> Attachments: hadoop-7602.1.patch, hadoop-7602.patch
>
>
> wordcount, sort etc on har files fails with
> NPE@createSocketAddr(NetUtils.java:137).
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