Socket.IO Multiple Connections Issue

[rgajrawala]

Issue

This issue is caused when the development server is restarted when the client is playing the game. The socket shows a disconnected error, and tries to reconnect. When the server is restarted, multiple Connected! messages are fired.

Fix

Emit a shutdown message to all sockets before close. The client will receive this message and then be redirected to a static problem page.

[nise]

Could you explain this with a code sample?

[rgajrawala]

Was properly fixed here: 438a1c1#diff-866d8f7d781501b99d30bc19ed0fe0ed.

Before, I wrapped all the handler bindings in socket.on('connect', ...). Every time the socket connected, it would add the same events. So when a user disconnected and reconnected without leaving the page, multiple events were bound. I moved the handler bindings out of socket.on('connect', ...) so they would only be bound once.