[jira] [Created] (AMBARI-25492) Ambari Sends Empty metrics_collector_hosts parameters after AMS service is deleted

["Akhil Naik (Jira)" <ji...@apache.org>]

Akhil Naik created AMBARI-25492:
-----------------------------------

             Summary: Ambari Sends Empty metrics_collector_hosts parameters after AMS service is deleted
                 Key: AMBARI-25492
                 URL: https://issues.apache.org/jira/browse/AMBARI-25492
             Project: Ambari
          Issue Type: Bug
          Components: ambari-server
    Affects Versions: 2.7.5
            Reporter: Akhil Naik


I am having an cluster where Ambari metrics collector was installed and removed later as they dont use it . Now there Nifi fails to start due to script error : 

{code:java}
----
Traceback (most recent call last):
  File "/var/lib/ambari-agent/cache/common-services/NIFI/1.0.0/package/scripts/nifi.py", line 304, in <module>
    Master().execute()
  File "/usr/lib/ambari-agent/lib/resource_management/libraries/script/script.py", line 352, in execute
    method(env)
  File "/var/lib/ambari-agent/cache/common-services/NIFI/1.0.0/package/scripts/nifi.py", line 139, in start
    import params
  File "/var/lib/ambari-agent/cache/common-services/NIFI/1.0.0/package/scripts/params.py", line 302, in <module>
    metrics_collector_host = str(config['clusterHostInfo']['metrics_collector_hosts'][0])
IndexError: list index out of range
----
{code}

Issue is easy to reproduce

1) Deploy a fresh cluster with HDF
2) Remove AMS service 
3) try to start/stop or restart nifi service. it will fail with abouve error.






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