EventID 29181, SnapshotSynchronization not taking place

Hello! For SCOM 2012 R2 UR+ if following error is logged every few minutes in the Operations Manager event log: OpsMgr Management Configuration Service failed to execute 'SnapshotSynchronization' engine work item due to the following exception Microsoft.EnterpriseManagement.ManagementConfiguration.DataAccessLayer.DataAccessException: Data access operation failed   at Microsoft.EnterpriseManagement.ManagementConfiguration.DataAccessLayer.DataAccessOperation.ExecuteSynchronously(Int32 timeoutSeconds, WaitHandle stopWaitHandle)   at Microsoft.EnterpriseManagement.ManagementConfiguration.CmdbOperations.CmdbDataProvider.GetConfigurationSnapshotNextBatch(SnapshotProcessWatermark watermark)   at Microsoft.EnterpriseManagement.ManagementConfiguration.Engine.TracingConfigurationDataProvider.GetConfigurationSnapshotNextBatch(SnapshotProcessWatermark watermark)   at Microsoft.EnterpriseManagement.ManagementConfiguration.Engine.SnapshotSynchronizationWorkItem.TransferData(SnapshotProcessWatermark initialWatermark)  …

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Event ID 21023 on the Management Server and no configuration getting distributed

Hi, today I wanted to explain the following error: OpsMgr Management Configuration Service failed to execute 'SnapshotSynchronization' engine work item due to the following exception Microsoft.EnterpriseManagement.ManagementConfiguration.DataAccessLayer.DataAccessException: Data access operation failed   at Microsoft.EnterpriseManagement.ManagementConfiguration.DataAccessLayer.DataAccessOperation.ExecuteSynchronously(Int32 timeoutSeconds, WaitHandle stopWaitHandle)   at Microsoft.EnterpriseManagement.ManagementConfiguration.CmdbOperations.CmdbDataProvider.GetConfigurationSnapshotNextBatch(SnapshotProcessWatermark watermark)   at Microsoft.EnterpriseManagement.ManagementConfiguration.Engine.TracingConfigurationDataProvider.GetConfigurationSnapshotNextBatch(SnapshotProcessWatermark watermark)   at Microsoft.EnterpriseManagement.ManagementConfiguration.Engine.SnapshotSynchronizationWorkItem.TransferData(SnapshotProcessWatermark initialWatermark)   at Microsoft.EnterpriseManagement.ManagementConfiguration.Engine.SnapshotSynchronizationWorkItem.ExecuteSharedWorkItem()   at Microsoft.EnterpriseManagement.ManagementConfiguration.Interop.SharedWorkItem.ExecuteWorkItem()   at Microsoft.EnterpriseManagement.ManagementConfiguration.Interop.ConfigServiceEngineWorkItem.Execute()———————————–System.InvalidCastException: Specified cast is not valid.  …

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