The SpectrumIM Connector sends a heartbeat poll to the Spectrum Landscape every minute to verify the connectivity.
Two reasons why this heartbeat poll gets missed:
1. The SpectroSERVER on that Landscape is busy and Corba requests from the Corba Client timed out.
2. The port 14001 is blocked between the Spectrum Server and the Connector Server. The Connector listens on port 14001 for Heartbeats and updates from Spectrum.
When the heartbeat gets missed, the Connector re-initializes and it does not receive any updates from Spectrum.
To determine this problem in the Spectrum Connector log search for "heartbeat missed" messages
Spectrum Heartbeat was missed, Connector will reinitialize