https://community.cloudera.com/t5/Support-Questions/Http-Error-500-KerberosName-NoMatchingRule/m-p/195420#M157476 <P>I don't know about the rules for Solr. The thing is that there was no rules for solr befor I added the two mentioned above.</P><P>The result of your command is : </P><PRE>$ hadoop org.apache.hadoop.security.HadoopKerberosName user@EXAMPLE.COM 18/01/23 15:28:10 INFO util.KerberosName: No auth_to_local rules applied to user@EXAMPLE.COM Name: user@EXAMPLE.COM to user@EXAMPLE.COM</PRE><P>I also tried :</P><PRE>$ hadoop org.apache.hadoop.security.HadoopKerberosName user@MY.PROD.EXAMPLE.COM Name: user@MY.PROD.EXAMPLE.COM to user</PRE> Tue, 23 Jan 2018 22:33:37 GMT julian_blin 2018-01-23T22:33:37Z