On kerberos' Configure Identities Step, Can't show any config page view?

[#1]

when i enable ambari kerberos,i have installed KDC and test it ok.

when it go Configure Identities Step, nothing can be show ,only running logo. where is wrong in my config???

[#2]

@Elvis Zhang

This could be due to system slowness. Can you please try by refreshing the browser? (Your previous actions would be retained by ambari and it will load 'Configure Identities' page).

Also please tail ambari server log (/var/log/ambari-server/ambari-server.log) while doing the refresh and check if you are seeing any error in the log.

[#3]

i try refesh chrome ,clean all cookies . but i didn't work. i check ambari-server.log ,nothing related with kerberos

[#4]

stderr: /var/lib/ambari-agent/data/errors-2515.txt

Traceback (most recent call last):
  File "/var/lib/ambari-agent/cache/common-services/KERBEROS/1.10.3-10/package/scripts/service_check.py", line 81, in <module>
    KerberosServiceCheck().execute()
  File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py", line 280, in execute
    method(env)
  File "/var/lib/ambari-agent/cache/common-services/KERBEROS/1.10.3-10/package/scripts/service_check.py", line 64, in service_check
    user=params.smoke_user
  File "/usr/lib/python2.6/site-packages/resource_management/core/base.py", line 155, in __init__
    self.env.run()
  File "/usr/lib/python2.6/site-packages/resource_management/core/environment.py", line 160, in run
    self.run_action(resource, action)
  File "/usr/lib/python2.6/site-packages/resource_management/core/environment.py", line 124, in run_action
    provider_action()
  File "/usr/lib/python2.6/site-packages/resource_management/core/providers/system.py", line 273, in action_run
    tries=self.resource.tries, try_sleep=self.resource.try_sleep)
  File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 70, in inner
    result = function(command, **kwargs)
  File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 92, in checked_call
    tries=tries, try_sleep=try_sleep)
  File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 140, in _call_wrapper
    result = _call(command, **kwargs_copy)
  File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 293, in _call
    raise ExecutionFailed(err_msg, code, out, err)
resource_management.core.exceptions.ExecutionFailed: Execution of '/usr/bin/kinit -c /var/lib/ambari-agent/tmp/kerberos_service_check_cc_2ce6caa1397f604948063293c5e53d22 -kt /etc/security/keytabs/kerberos.service_check.032217.keytab hadoop-032217@EXAMPLE.COM' returned 1. kinit: Cannot find KDC for realm "EXAMPLE.COM" while getting initial credentials

stdout: /var/lib/ambari-agent/data/output-2515.txt

Performing kinit using hadoop-032217@EXAMPLE.COM
2017-03-22 08:47:04,347 - Execute['/usr/bin/kinit -c /var/lib/ambari-agent/tmp/kerberos_service_check_cc_2ce6caa1397f604948063293c5e53d22 -kt /etc/security/keytabs/kerberos.service_check.032217.keytab hadoop-032217@EXAMPLE.COM'] {'user': 'ambari-qa'}
2017-03-22 08:47:04,417 - File['/var/lib/ambari-agent/tmp/kerberos_service_check_cc_2ce6caa1397f604948063293c5e53d22'] {'action': ['delete']}

Command failed after 1 tries