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https://issues.apache.org/jira/browse/AMBARI-13907?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Hari Sekhon updated AMBARI-13907:
---------------------------------
    Description: 
When provisioning an Ambari cluster via a blueprint that was taken from an 
existing cluster install, Ambari fails with a list index out of range error on 
the metrics collector.

I suspect this is due to not supplying all host_groups in the mapping json at 
cluster creation time but there was no validation on missing host groups to 
prevent this scenario so it fails late in to the install.

{code}Traceback (most recent call last):
  File 
"/var/lib/ambari-agent/cache/common-services/AMBARI_METRICS/0.1.0/package/scripts/metrics_monitor.py",
 line 58, in <module>
    AmsMonitor().execute()
  File 
"/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py",
 line 216, in execute
    method(env)
  File 
"/var/lib/ambari-agent/cache/common-services/AMBARI_METRICS/0.1.0/package/scripts/metrics_monitor.py",
 line 29, in install
    self.configure(env) # for security
  File 
"/var/lib/ambari-agent/cache/common-services/AMBARI_METRICS/0.1.0/package/scripts/metrics_monitor.py",
 line 32, in configure
    import params
  File 
"/var/lib/ambari-agent/cache/common-services/AMBARI_METRICS/0.1.0/package/scripts/params.py",
 line 54, in <module>
    metric_collector_host = ams_collector_hosts[0]
IndexError: list index out of range
{code}

  was:
When provisioning an Ambari cluster via a blueprint that was taken from an 
existing cluster install, Ambari fails with a list index out of range error on 
the metrics collector.

I suspect this is due to not supplying all host_groups in the mapping json at 
cluster creation time but there was no validation on this to prevent it.


> Ambari Blueprint provisioning error "list index out of range"
> -------------------------------------------------------------
>
>                 Key: AMBARI-13907
>                 URL: https://issues.apache.org/jira/browse/AMBARI-13907
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server, blueprints
>    Affects Versions: 2.1.0
>         Environment: HDP 2.3
>            Reporter: Hari Sekhon
>            Priority: Critical
>
> When provisioning an Ambari cluster via a blueprint that was taken from an 
> existing cluster install, Ambari fails with a list index out of range error 
> on the metrics collector.
> I suspect this is due to not supplying all host_groups in the mapping json at 
> cluster creation time but there was no validation on missing host groups to 
> prevent this scenario so it fails late in to the install.
> {code}Traceback (most recent call last):
>   File 
> "/var/lib/ambari-agent/cache/common-services/AMBARI_METRICS/0.1.0/package/scripts/metrics_monitor.py",
>  line 58, in <module>
>     AmsMonitor().execute()
>   File 
> "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py",
>  line 216, in execute
>     method(env)
>   File 
> "/var/lib/ambari-agent/cache/common-services/AMBARI_METRICS/0.1.0/package/scripts/metrics_monitor.py",
>  line 29, in install
>     self.configure(env) # for security
>   File 
> "/var/lib/ambari-agent/cache/common-services/AMBARI_METRICS/0.1.0/package/scripts/metrics_monitor.py",
>  line 32, in configure
>     import params
>   File 
> "/var/lib/ambari-agent/cache/common-services/AMBARI_METRICS/0.1.0/package/scripts/params.py",
>  line 54, in <module>
>     metric_collector_host = ams_collector_hosts[0]
> IndexError: list index out of range
> {code}



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