Kerberos KDC not reachable

[#1]

kdc-unreachable.jpgI am trying to kereeberise my HDP cluster. I have installed a KDC on the ambari host itself and i want to use that. so i selected option 1 (existing KDC) in ambari. But when i try to test the KDC connection it fails and i get the following error.

23 Mar 2016 13:16:29,457 WARN [qtp-ambari-client-18131] KdcServerConnectionVerification:187 - An unexpected exception occurred while attempting to communicate with the KDC server at hostname:88 over TCP 23 Mar 2016 13:16:29,459 WARN [qtp-ambari-client-18131] KdcServerConnectionVerification:187 - An unexpected exception occurred while attempting to communicate with the KDC server at hostname:88 over UDP 23 Mar 2016 13:16:29,460 ERROR [qtp-ambari-client-18131] KdcServerConnectionVerification:113 - Failed to connect to the KDC at hostname:88 using either TCP or UDP

But when i try to do kinit or invoke any kerberos command from the ambari/KDC host it is working fine. It is pretty strange and i dont see any network related issues. this error is seen only when a wrong kdc information is provided. But in my case even after providing the correct details it fails. From the logs i couldnt trace anything.

Is there any way to debug or trace it.

i used ping, telenet to do the basic checks and everything is fine.

P.s i have just replaced my KDC host names with the string "hostname"in the above error message.

[#2]

It doesnt work for me even though i faced same problem and i did same steps mentioned..

[#3]

Hi, 

You must deploy the jce policy on every cluster nodes if you are using built-in openjdk.

Please follow the steps.

[root@hostname]# locate local_policy.jar

[root@hostname]# wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jce/8/jce_policy-8.zip"

[root@hostname]# unzip -o -j -q jce_policy-8.zip -d /usr/jdk64/jdk1.8.0_112/jre/lib/security/

[root@hostname]# ambari-server rstart

Now test the connection. Hopes it will resolves the issue.