Grafana HBase-Performance -> Operation Latencies -Scan Next shows 'No datapoints'

[#1]

Ambari: 2.2.2

HDP : 2.4.2

Why do only these graphs show No datapoints?

[#2 · Accepted solution]

Are you able to see other RegionServer metrics on this dashboard?

I checked out my test cluster with HDP 2.6 and Ambari 2.5 and I am able to see them.

One way to verify if these metrics were ever sent to AMS is by making a call to AMS metadata API in your browser:

http://<ams-collector-host>:6188/ws/v1/timeline/metrics/metadata

You can look for metrics name in the response, example: regionserver.Server.ScanTime

[#3]

@swagle

Yes I can see other HBase metrics.

http://hdp242-s1.openstacklocal:3000/dashboard/db/hbase-performance

I do not see "regionserver.Server.ScanTime" in the metadata.

ambarimetrics-metadata.txt

[#4]

hdp242-s1.openstacklocal: Doesn't resolve for me.

If the metric is not in metadata that means that HBase has never sent this metric to AMS.

Did you perform a scan / run Ambari Smoke test to see if any data is sent?

Could be this metric is not sent by the HBase version you are using?