Please create all resources belonging to an HDInsight cluster in the same Resource Group.
Please create all resources belonging to an HDInsight cluster in one Resource Group.
When you create an HDInsight cluster into a Vnet, all network resources such as NIC's, Load Balancers and Public IP addresses are created within the resource group that contains the Vnet. Only the HDInsight object itself is created in the original resource group. This is fine for testing but in multi-subscription environments with shared Vnets across resource groups, this is not ideal.