It is used to count the number of RPC calls and the call time. The extension interface is MonitorFactory, and the corresponding implementation class is DubboMonitorFactroy.
Users can implement the MonitorFactory extension interface of this layer to implement custom monitoring statistics strategies. In the implementation class of the custom monitoring statistics strategy, an exception occurred during business runtime.
Check the business class of org.apache.dubbo.monitor.MonitorFactory interface, there may be code logic errors in the implementation method.