Unexpected error. Unable to verify database connection.

[#1]

Dear Cloudera Community,

Anyone can help me with this error on CDH5.10.0 on Centos 7.3

I have tried with embedded and MySQL server but it didnt worked . Its the first machine on the cluster .

This error seems to be a bug in the release or have no clue what is missing .

I tried multiple times with different OS in different VM .

Please guide

[#2]

Hi,
Can you check the log file /var/log/cloudera-scm-server/cloudera-scm-server.log, it should provide more details about the error you are seeing.

Regards,
Jim

[#3]

Hi.I am deploying my cluster and encounter the same problem.

And I checked the /var/log/cloudera-scm-server/cloudera-scm-server.log as follow:

2018-10-10 19:32:26,313 INFO CommandPusher:com.cloudera.cmf.model.DbCommand: Command 84(AmonTestDatabaseConnection) has completed. finalstate:FINISHED, success:true, msg:Successful
2018-10-10 19:32:27,062 INFO scm-web-333:com.cloudera.enterprise.JavaMelodyFacade: Entering HTTP Operation: Method:POST, Path:/dbTestConn/checkConnectionResult
2018-10-10 19:32:27,066 INFO scm-web-333:com.cloudera.enterprise.JavaMelodyFacade: Exiting HTTP Operation: Method:POST, Path:/dbTestConn/checkConnectionResult, Status:200
2018-10-10 19:32:28,394 INFO CommandPusher:com.cloudera.cmf.service.AbstractOneOffHostCommand: Unsuccessful 'HueTestDatabaseConnection'
2018-10-10 19:32:28,394 INFO CommandPusher:com.cloudera.cmf.service.AbstractDbConnectionTestCommand: Command exited with code: 1
2018-10-10 19:32:28,394 INFO CommandPusher:com.cloudera.cmf.service.AbstractDbConnectionTestCommand: File "/usr/lib/hue/build/env/lib/python2.7/site-packages/Django-1.11-py2.7.egg/django/core/checks/registry.py", line 81, in run_checks
new_errors = check(app_configs=app_configs)
File "/usr/lib/hue/build/env/lib/python2.7/site-packages/Django-1.11-py2.7.egg/django/core/checks/urls.py", line 16, in check_url_config
return check_resolver(resolver)
File "/usr/lib/hue/build/env/lib/python2.7/site-packages/Django-1.11-py2.7.egg/django/core/checks/urls.py", line 26, in check_resolver
return check_method()
File "/usr/lib/hue/build/env/lib/python2.7/site-packages/Django-1.11-py2.7.egg/django/urls/resolvers.py", line 254, in check
for pattern in self.url_patterns:
File "/usr/lib/hue/build/env/lib/python2.7/site-packages/Django-1.11-py2.7.egg/django/utils/functional.py", line 35, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/usr/lib/hue/build/env/lib/python2.7/site-packages/Django-1.11-py2.7.egg/django/urls/resolvers.py", line 405, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/usr/lib/hue/build/env/lib/python2.7/site-packages/Django-1.11-py2.7.egg/django/utils/functional.py", line 35, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/usr/lib/hue/build/env/lib/python2.7/site-packages/Django-1.11-py2.7.egg/django/urls/resolvers.py", line 398, in urlconf_module
return import_module(self.urlconf_name)
File "/usr/lib64/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
File "/usr/lib/hue/desktop/core/src/desktop/urls.py", line 41, in <module>
from desktop.auth import views as desktop_auth_views
File "/usr/lib/hue/desktop/core/src/desktop/auth/views.py", line 38, in <module>
from desktop.auth import forms as auth_forms
File "/usr/lib/hue/desktop/core/src/desktop/auth/forms.py", line 30, in <module>
from useradmin.hue_password_policy import hue_get_password_validators
ImportError: No module named useradmin.hue_password_policy

2018-10-10 19:32:28,394 ERROR CommandPusher:com.cloudera.cmf.model.DbCommand: Command 86(HueTestDatabaseConnection) has completed. finalstate:FINISHED, success:false, msg:Unexpected error. Unable to verify database connection.

so how can I fix this 

ImportError: No module named useradmin.hue_password_policy