Problem
NetVizura suddenly stopped collecting Netstream (NetFlow 9 like) data from the Huawei exporter after the application has been restarted.
Cause
The collector application must cache template records received, and then parse data records it encounters by locating the appropriate template record within the cache. Some Huawei devices send only one or few template records on the beginning of their NetFlow export (e.g. when you initially configure NetFlow export on device) and then send nothing but data records. If you interrupt the collection of Netstream data on the collector side (e.g. restart NetFlow application), template records will not be sent again.
Solution
If you want to see your Huawei NetFlow data again, you must reconfigure (restart) exporting of NetFlow data on the Huawei exporter.