Fixed – The plug-in execution failed because no Sandbox Hosts are currently available. Please check that you have a Sandbox server configured and that it is running – Dataverse / Dynamics 365

Recently we were bulk updating our records, which would trigger an asynchronous plugin registered on its update. We were using the wonderful Bulk Data Updater (XrmToolBox) plugin for it. We realized if we are updating too many records at once say e.g. 100 Batch Size (total 5K records to be processed), we are getting below exception.

The plug-in execution failed because no Sandbox Hosts are currently available. Please check that you have a Sandbox server configured and that it is running.System.ServiceModel.FaultException`1[Microsoft.Xrm.Sdk.OrganizationServiceFault]: The plug-in execution failed because no Sandbox Hosts are currently available. Please check that you have a Sandbox server configured and that it is running. Microsoft.Xrm.RemotePlugin.Grpc.ExceptionHandlers.SandboxFabricHostCommunicationException: Error communicating with Sandbox Host

We than updated the Execution settings to process with a Batch Size of 5 with an interval of 60 seconds. This fixed the issue for us.

Also, check –

The plug-in execution failed because the Sandbox Worker process crashed. This is typically due to an error in the plug-in code – Dataverse / Dynamics 365

The plug-in execution failed because no Sandbox Hosts are currently available. Please check that you have a Sandbox server configured and that it is running.

Hope it helps..