Description
We're using the socket.io-client v1.0.0 in our Android project. Having a connection open we've noticed sometimes when internet connectivity is lost the following error happens:
io.socket.engineio.client.EngineIOException: websocket error
io.socket.engineio.client.Transport.onError(Transport.java:63)
io.socket.engineio.client.transports.WebSocket.access$400(WebSocket.java:24)
io.socket.engineio.client.transports.WebSocket$1$5.run(WebSocket.java:107)
io.socket.thread.EventThread$2.run(EventThread.java:80)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
java.lang.Thread.run(Thread.java:818)
That leads to the socket getting disconnected, reason being transport error
The issue we've identified is upon a reconnection (once internet connectivity is available again) some of the registered Acks will never get notified (they remain indefinitely in the internal acks map in io.socket.client.Socket). It seems some of the packets for those Acks do not reach the server, in other cases they actually do but it's the response that gets lost.
These are our socket options:
IO.Options opts = new IO.Options(); opts.secure = true; opts.forceNew = true; opts.reconnection = true; opts.reconnectionAttempts = MAX_RECONNECTS; opts.reconnectionDelay = 2000; opts.transports = new String[]{"websocket"}; opts.upgrade = true; Socket socket = IO.socket(socketUrl, opts);