SPINE, RRDTOOL, Data Source, Graph - data is not shown in the graph but they are indeed displayed in Graph Real-Time

[MSS970]

          Hi @TheWitness ,

I have installed the latest version of spine, I started to receive the below feedback from the poller:

10:00am
WARNING: There are 1 processes detected as overrunning a polling cycle for Poller[[Main Poller]], please investigate.

10:05am
WARNING: There are 1 processes detected as overrunning a polling cycle for Poller[[Main Poller]], please investigate.

10:10am
WARNING: There are 1 processes detected as overrunning a polling cycle for Poller[[Main Poller]], please investigate.

10:20am
WARNING: Scheduled Task is out of sync with the Poller Interval for Poller[[Main Poller]]! The Poller Interval is 300 seconds, with a maximum of a 300 seconds, but 599 seconds have passed since the last poll!

10:20am
WARNING: There are 1 processes detected as overrunning a polling cycle for Poller[[Main Poller]], please investigate.

10:25am
Maximum runtime of 298 seconds exceeded for Poller[[Main Poller]]. Exiting.

10:25am
WARNING: There are 1 processes detected as overrunning a polling cycle for Poller[[Main Poller]], please investigate.

10:30am
WARNING: There are 1 processes detected as overrunning a polling cycle for Poller[[Main Poller]], please investigate.

10:35am
WARNING: There are 1 processes detected as overrunning a polling cycle for Poller[[Main Poller]], please investigate.

And the main reported incident is still persistent, kindly refer to the screenshot.

I have rolled back to spine 1.2.28 for now.

Originally posted by @MSS970 in #361 (comment)