Below errors can be seen from the agent logs.
2017-03-10 08:22:43.888 ERROR [Quartz-2078] com.dell.foglight.storage.StorageCollectorImpl - Error occurring during topology collection. No data submitted
Caused by: java.lang.NullPointerException
The above error means there is NullPointerException on java method "cachePortSpeed". In this method, only one thing is done that is to get the port speed info into cache. However this method has bug where in if speed info is empty, it will parse into null and try to convert null to integer which causes nullPointException ultimately affecting the topology object creation.