Heart beating and clustering

[gedw99]

is this how it currently works ?

When opening the browser app (client) it creates a SSE connection to one of the backend instances.

You have no guarantee of which one it is.

The backend should send an heartbeat every X seconds to the client.

If the client stops receiving the heartbeats then he can assume that the backend is down. It can then re-create the SSE connection. But you might have lost notifications...

To avoid this you maybe have a timestamp or a notification id, and when re-creating the connection you pass that timestamp or id to get all the subsequent notifications from it.

Nats then tries to send the sse event to the browser .

I am playing around with benthos SSE plugin for Datastar .

[bencroker]

When opening the browser app (client) it creates a SSE connection to one of the backend instances. You have no guarantee of which one it is.

Correct.

The backend should send an heartbeat every X seconds to the client.

No, this shouldn’t be required.

[gedw99]

thanks !!