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https://issues.apache.org/jira/browse/AMBARI-21606?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Yang resolved AMBARI-21606.
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Resolution: Not A Problem
By following post migration operational steps, we can properly upgrade Ambari
metrics to HDP stack. This bug becomes not a problem.
> Ambari Metrics is not responding after upgrade
> ----------------------------------------------
>
> Key: AMBARI-21606
> URL: https://issues.apache.org/jira/browse/AMBARI-21606
> Project: Ambari
> Issue Type: Bug
> Affects Versions: 2.5.2
> Reporter: Eric Yang
> Assignee: Siddharth Wagle
> Fix For: 2.5.2
>
>
> In ambari-metrics-monitor log file, it shows:
> {code}
> 2017-07-28 20:05:46,577 [WARNING] emitter.py:74 - Error sending metrics to
> server. 'NoneType' object has no attribute 'strip'
> 2017-07-28 20:05:46,578 [WARNING] emitter.py:80 - Retrying after 5 ...
> {code}
> Widgets in all services are showing out of date data. There doesn't seem to
> be new data getting into collector. Collector log files showing no error.
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