Cloudera Docs

Configure source and destination realms in krb5.conf

You must ensure that the krb5.conf file on the client from which the distcp job is submitted includes realm definitions and mappings for both source and destination realms.

Include the realm definitions and mappings for both source and destination realms in the krb5.conf file, as specified in the following example. 
[realms]
 QA.EXAMPLE.COM = {
  kdc = kdc01.qa.example.com:88
  admin_server = kdc01.qa.example.com:749
 }

 DEV.EXAMPLE.COM = {
  kdc = kdc01.dev.example.com:88
  admin_server = kdc01.dev.example.com:749
 }

[domain_realm]
.qa.example.com = QA.EXAMPLE.COM
qa.example.com = QA.EXAMPLE.COM
.dev.example.com = DEV.EXAMPLE.COM
dev.example.com = DEV.EXAMPLE.COM