Yeah that's not good. This message usually indicates the poller isn't working. This needs to be fixed before we look at the the nodes themselves.
General steps to resolve this:
- Verify connectivity between the poller and the database
- Verify the polling services are running see Orion Service Manager (Start Menu -> SolarWindsOrion -> Advanced Features)
- Verify licensing is synchronized (Start Menu -> SolarWinds (not Orion) -> SolarWinds License Manager)
- Restart Poller (If you use additional pollers make sure they are restarted after the NPM server is restarted)
- Re-run Configuration Wizard (Start Menu -> SolarWindsOrion -> Configuration and Auto-Discovery -> Configuration Wizard) - Pay close attention to the DB and NPM settings and configurations
I've seen this before related to Licensing, .Net corruption, Services crashing on NPM, and DB dns name issues.