grpc: received message larger than max

[zaur]

Recently we started getting enormous amounts of connection errors, and hence prolonged timeouts on blockchain transactions.

We have added some extra logging after this line of code:

flow-wallet-api/chain_events/listener.go

Line 168 in 87375b1

if l.systemService != nil {

and this is what we've got:
level=warning msg="Unable to connect to chain, pausing system" function=Listener.Start.goroutine package=chain_events
level=warning msg="client: rpc error: code = ResourceExhausted desc = grpc: received message larger than max (4296233 vs. 4194304)" function=Listener.Start.goroutine package=chain_events

Please increase the max size of incoming grpc messages to 16Mb (that is Flow's limit), or make it a configurable parameter.