[jira] [Created] (HADOOP-9019) KerberosAuthenticator.doSpnegoSequence(..) should create a HTTP principal with hostname everytime

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

Vinay created HADOOP-9019:
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             Summary: KerberosAuthenticator.doSpnegoSequence(..) should create a HTTP principal with hostname everytime 
                 Key: HADOOP-9019
                 URL: https://issues.apache.org/jira/browse/HADOOP-9019
             Project: Hadoop Common
          Issue Type: Bug
            Reporter: Vinay


in KerberosAuthenticator.doSpnegoSequence(..) following line of code will just create a principal of the form "HTTP/<host>",
{code}            String servicePrincipal = KerberosUtil.getServicePrincipal("HTTP",
                KerberosAuthenticator.this.url.getHost());{code}
 but uri.getHost() is not sure of always getting hostname. If uri contains IP, then it just returns IP.


For SPNEGO authentication principal should always be created with <hostname>.

This code should be something like this, which will look /etc/hosts to get hostname
{code}            String hostname = InetAddress.getByName(
                KerberosAuthenticator.this.url.getHost()).getHostName();
String servicePrincipal = KerberosUtil.getServicePrincipal("HTTP",
                hostname);{code}




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