[jira] [Updated] (AMBARI-22060) Fail to restart Ranger Admin during HDP downgrade.

["Dmitry Lysnichenko (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMBARI-22060?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dmitry Lysnichenko updated AMBARI-22060:
----------------------------------------
    Attachment: AMBARI-22060.patch

> Fail to restart Ranger Admin  during HDP downgrade.
> ---------------------------------------------------
>
>                 Key: AMBARI-22060
>                 URL: https://issues.apache.org/jira/browse/AMBARI-22060
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server
>            Reporter: Dmitry Lysnichenko
>            Assignee: Dmitry Lysnichenko
>            Priority: Critical
>         Attachments: AMBARI-22060.patch
>
>
> During the downgrade process, run into the following error whilst it's restating Ranger Admin:
> {code}
> Traceback (most recent call last):
> File "/var/lib/ambari-agent/cache/common-services/RANGER/0.4.0/package/scripts/ranger_admin.py", line 216, in
> RangerAdmin().execute()
> File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py", line 329, in execute
> method(env)
> File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py", line 850, in restart
> self.start(env, upgrade_type=upgrade_type)
> File "/var/lib/ambari-agent/cache/common-services/RANGER/0.4.0/package/scripts/ranger_admin.py", line 93, in start
> setup_ranger_audit_solr()
> File "/var/lib/ambari-agent/cache/common-services/RANGER/0.4.0/package/scripts/setup_ranger_xml.py", line 705, in setup_ranger_audit_solr
> new_service_principals = [params.ranger_admin_jaas_principal])
> File "/usr/lib/python2.6/site-packages/resource_management/libraries/functions/solr_cloud_util.py", line 329, in add_solr_roles
> new_service_users.append(__remove_host_from_principal(new_service_user, kerberos_realm))
> File "/usr/lib/python2.6/site-packages/resource_management/libraries/functions/solr_cloud_util.py", line 266, in __remove_host_from_principal
> if not realm:
> File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/config_dictionary.py", line 73, in __getattr__
> raise Fail("Configuration parameter '" + self.name + "' was not found in configurations dictionary!")
> resource_management.core.exceptions.Fail: Configuration parameter 'kerberos-env' was not found in configurations dictionary!
> {code}
> The reason was that server did not have many configs selected, and did not send them to agent during downgrade. There are few issues here:
> - During upgrade from 2.4 to 2.5, finalize did not update current cluster version. As a result config helpers have gone mad
> - As a result of previous issue, some Configure tasks failed to execute
> - During downgrade from 2.6 , looks like cluster entity DB state was not consistent after config selection, so sometimes configs were not selected is some cases. I managed to reproduce that only once,
> it's a race condition that is very hard to catch/trace in debugger.



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