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Do you have any monitoring set up on your master nodes? I've seen this happen when the leader master node dies. In our case, it was due to memory pressure from having too many tasks for the size of the master

we are seeing network error mostly on console after few mins in every page just not above page.. is it still related to memory pressure

I'd start by trying to isolate which service / if a service is being restarted. Then we can investigate why that particular service is having problems

thanks Suneet for quick help