@Oleg Tarassov, You are not looking at the correct source code version for Ambari 220.127.116.11. I believe that you want to look at https://github.com/apache/ambari/blob/release-2.6.2/ambari-server/src/main/java/org/apache/ambari/server/serveraction/kerberos/IPAKerberosOperationHandler.java#L949. According to this, the encryption types are not considered when exporting keytab files from IPA. This has been fixed in Ambari 2.7.0 and above. See https://issues.apache.org/jira/browse/AMBARI-22293.
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