While trying to simulate one fog device(one router) using 100 cameras in a Fog-Based Cloud Network in a surveillance system IoT application, I got the following results
"
Placement of operator object_detector on device Router-0 successful.
Placement of operator object_tracker on device Router-0 successful.
Router-0 is shifting object_detector north.
Proxy-Server is shifting object_detector north.
Cloud is shifting object_tracker north.
Cloud is shifting object_detector north.
Placement of operator object_tracker on device Cloud successful.
Placement of operator user_interface on device Cloud successful.
Placement of operator object_detector on device Router-0 successful.
Router-0 is shifting object_detector north.
Cloud is shifting object_tracker north.
Proxy-Server is shifting object_detector north.
java.lang.NullPointerException
at org.fog.placement.ModulePlacementEdgewards.shiftModuleNorth(ModulePlacementEdgewards.java:303)
at org.fog.placement.ModulePlacementEdgewards.placeModulesInPath(ModulePlacementEdgewards.java:207)
at org.fog.placement.ModulePlacementEdgewards.mapModules(ModulePlacementEdgewards.java:73)
at org.fog.placement.ModulePlacementEdgewards.(ModulePlacementEdgewards.java:54)
at org.fog.Simulation.FogSurveillanceSystem.main(FogSurveillanceSystem.java:114)
"
Can anybody help me with some of my following queries based on above simulation results?
What does the following means and signify?
a. Router-0 is shifting object_detector north.
b. Cloud is shifting object_tracker north.
c. Cloud is shifting object_detector north.
What does the following error means and how to fix them?
"
java.lang.NullPointerException
at org.fog.placement.ModulePlacementEdgewards.shiftModuleNorth(ModulePlacementEdgewards.java:303)
at org.fog.placement.ModulePlacementEdgewards.placeModulesInPath(ModulePlacementEdgewards.java:207)
at org.fog.placement.ModulePlacementEdgewards.mapModules(ModulePlacementEdgewards.java:73)
at org.fog.placement.ModulePlacementEdgewards.(ModulePlacementEdgewards.java:54)
at org.fog.Simulation.FogSurveillanceSystem.main(FogSurveillanceSystem.java:114)
For router =1, no of cameras =5, I got the following normal results
" Placement of operator object_detector on device Router-0 successful.
Placement of operator object_tracker on device Router-0 successful.
Router-0 is shifting object_detector north.
Creating motion_detector on device Camera-0-4
Creating user_interface on device Cloud
Creating object_tracker on device Proxy-Server
Creating object_detector on device Proxy-Server
Creating motion_detector on device Camera-0-0
Creating motion_detector on device Camera-0-1
Creating motion_detector on device Camera-0-2
Creating motion_detector on device Camera-0-3"
While trying to simulate one fog device(one router) using 100 cameras in a Fog-Based Cloud Network in a surveillance system IoT application, I got the following results " Placement of operator object_detector on device Router-0 successful. Placement of operator object_tracker on device Router-0 successful. Router-0 is shifting object_detector north. Proxy-Server is shifting object_detector north. Cloud is shifting object_tracker north. Cloud is shifting object_detector north. Placement of operator object_tracker on device Cloud successful. Placement of operator user_interface on device Cloud successful. Placement of operator object_detector on device Router-0 successful. Router-0 is shifting object_detector north. Cloud is shifting object_tracker north. Proxy-Server is shifting object_detector north. java.lang.NullPointerException at org.fog.placement.ModulePlacementEdgewards.shiftModuleNorth(ModulePlacementEdgewards.java:303) at org.fog.placement.ModulePlacementEdgewards.placeModulesInPath(ModulePlacementEdgewards.java:207) at org.fog.placement.ModulePlacementEdgewards.mapModules(ModulePlacementEdgewards.java:73) at org.fog.placement.ModulePlacementEdgewards.(ModulePlacementEdgewards.java:54) at org.fog.Simulation.FogSurveillanceSystem.main(FogSurveillanceSystem.java:114) " Can anybody help me with some of my following queries based on above simulation results?
For router =1, no of cameras =5, I got the following normal results " Placement of operator object_detector on device Router-0 successful. Placement of operator object_tracker on device Router-0 successful. Router-0 is shifting object_detector north. Creating motion_detector on device Camera-0-4 Creating user_interface on device Cloud Creating object_tracker on device Proxy-Server Creating object_detector on device Proxy-Server Creating motion_detector on device Camera-0-0 Creating motion_detector on device Camera-0-1 Creating motion_detector on device Camera-0-2 Creating motion_detector on device Camera-0-3"