Hey Kashmira 
The arithmetic exception could be this:
Heap sizing information is in the tuning guide - you need to check which process is out of Heap space - for example, if you now have a lot of segments, then the broker and / or coordinator might be unable to fit that all into memory now.
As for the delay in appearing to superset - then you should check the load queues - if you cannot get to the console’s page (because of that error) there are a number of APIs you can use: