Eli Collins created HADOOP-8554:
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             Summary: KerberosAuthenticator should use the configured principal
                 Key: HADOOP-8554
                 URL: https://issues.apache.org/jira/browse/HADOOP-8554
             Project: Hadoop Common
          Issue Type: Bug
          Components: security
    Affects Versions: 1.0.0
            Reporter: Eli Collins


In KerberosAuthenticator we construct the principal as follows:

{code}
String servicePrincipal = "HTTP/" + KerberosAuthenticator.this.url.getHost();
{code}

Seems like we should use the configured 
hadoop.http.authentication.kerberos.principal instead right?

I hit this issue as a distcp using webhdfs://localhost fails because 
HTTP/localhost is not in the kerb DB but using webhdfs://eli-thinkpad works 
because HTTP/eli-thinkpad is (and is my configured principal). distcp using 
Hftp://localhost with the same config works so it looks like this check is 
webhdfs specific for some reason (webhdfs is using spnego and hftp is not?).

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