I am seeing the following error in the tomcat log:
Feb 10, 2020 09:13:47.566 (PoolThread-5: UIMDataProcessorPool => UIMDataProcessorForSpectrumRest.processHostEntityData) (NimsoftIntegrationServlet) - Processing Host
Feb 10, 2020 09:13:47.623 - ThreadPool: exception thrown from ThreadTask: java.lang.NullPointerException
UIM Integration with Spectrum may throw this exception in the OneClick tomcat log during model sync, if no physical hosts are being synced (only virtual host models are being sync.) This will be resolved in a future version of Spectrum.
Release : 10.4.1
Component : Spectrum Applications
This NullPointer exception is bening and no further action is required. The error will be resolved in a future version of Spectrum.