[AMBARI-24403] [Ambari metrics][grafana] grafana is not showing any datapoints if the queue name contains special characters

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6.2
• Fix Version/s: trunk, 2.7.1
• Component/s: ambari-metrics
• Labels: pull-request-available
• Assignee: Akhil Naik
• Reporter: Akhil Naik
• Created: 02/Aug/18 14:31
• Updated: 04/Aug/18 05:27
• Resolved: 04/Aug/18 05:27

Description

grafana is not showing any data points if the queue name contains special characters

I have a queue named 'A&B' , in Yarn queues dashboard if I select this queue name I am getting empty data showing no data points.

The issue is reproducible

Analysis :

In grafana UI we are sending the request to fetch the data by encoding the URI.
for which the server is interpreting it as separate parameters

http://mygrafanaserver.com:3000/api/datasources/proxy/1/ws/v1/timeline/metrics?metricNames=yarn.QueueMetrics.Queue=root.A&B.AppsRunning._max&appId=resourcemanager&startTime=1533181180&endTime=1533202780

Which should ideally be :

http://mygrafanaserver.com:3000/api/datasources/proxy/1/ws/v1/timeline/metrics?metricNames=yarn.QueueMetrics.Queue=root.A%26B.AppsRunning._max&appId=resourcemanager

Issue Links

• links to: GitHub Pull Request #1957
• links to: GitHub Pull Request #1958