Since the upgrade of my openHistorian version to 2.8.249, embedding 9.1.5 version of Grafana (which is great because in addition to the new Grafana functionalities introduced compared to the previous version 7.x, the OpenHistorianAlarmPanel and GPAPhasorMap plugins work now!), I encounters the following problem: when I try to display a TimeSeries type graph of the frequency of a PMU, if the requested time range is < 24 seconds then I have the No_Data message displayed and Grafana returns ‘Query error: 500 internal server error’.
If I set a time interval of 24 seconds on the same graph; then it works. On an earlier version of OpenHistorian (thus implying a version of Grafana < 9); the graph is displayed without problems; even for a period of 1 second. My datarate is 50 fps. PDC data source for those two openHistorian servers is the same.
Maybe an issue caused by the ‘new’ version of the OHData Source that as been adapted to work with the new version of Grafana ? Or maybe a new config parameter ?
Could you please confirm that you can reproduce the issue ?
Thank you very much,