I had this issue when I set a polling interval as well, but if you leave the polling interval blank it will use the Node or Interface polling interval by default.
Also if you're using transforms the polling intervals need to match.
If you leave the interval blank and then check back in about 10 minutes does the data poll?
Tried that, left the polling interval blank. It's been over an hour, no stats, no polling.
If I assign the defined poller, then test, the correct values are being returned for the 8 nodes I have it assigned to. But if I look in the All Nodes section of UDP program, and highlight one of the values, there is no data, and "last polled" shows blank.
Okay, just found this in the logs:
2018-08-20 12:15:38,089  DEBUG CustomPollerManagerController - Start getting custom poller statistic
2018-08-20 12:15:38,089  DEBUG ChannelProxy`1 - Invoking <GetCustomPollerStatistics>b__af started
2018-08-20 12:15:38,089  WARN WCFChannelFactory`1 - System.ServiceModel.CommunicationObjectFaultedException: The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communication because it is in the Faulted state.
Server stack trace:
at System.ServiceModel.Channels.CommunicationObject.Close(TimeSpan timeout)
Exception rethrown at :
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at SolarWinds.Orion.Core.Common.WCFChannelFactory`1.DisposeChannel(T channel)
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Which log did you find that error in? There's an exact match, but that appears to be for SAM:
One that appears to be related and more for NPM:
Though I think if you were having the second issue it would be more severe.
Additionally this discusses your symptoms:
Found it in the poller log. Ended up just rebooting the entire Solarwinds server and the poller started working.
Thank you very much for your input, much appreciated!