Use fanout for publish if mesh is empty even if we are subscribed to a topic#675
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Use fanout for publish if mesh is empty even if we are subscribed to a topic#675aarshkshah1992 wants to merge 2 commits into
aarshkshah1992 wants to merge 2 commits into
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@MarcoPolo @sukunrt Please can I request you to take a look ? |
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If a peer subscribes to a topic when it has not yet seen any other peers for the topic, it will set the mesh to an empty map.
Now say another peer comes in and subscribes to the topic. But, it has not been grafted yet and has yet to be added to the mesh. However, it is now added to the list of peers subscribed to a given topic.
Now, if the first peer does a Publish -> we see that the mesh exists and so don't do a fanout. However, the mesh is empty which means that the peer above never sees the message.
Later, on a heartbeat, the second peer gets grafted but it's too late.