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java.lang.IllegalStateException: must call close()	at okhttp3.internal.ws.RealWebSocket.sendMessage(RealWebSocket.java:108)	at io.socket.engineio.client.transports.WebSocket$3.call(WebSocket.java:173)	at io.socket.engineio.parser.Parser.encodePacket(Parser.java:63)	at io.socket.engineio.parser.Parser.encodePacket(Parser.java:42)	at io.socket.engineio.client.transports.WebSocket.write(WebSocket.java:168)	at io.socket.engineio.client.Transport$3.run(Transport.java:101)	at io.socket.thread.EventThread.exec(EventThread.java:50)	at io.socket.engineio.client.Transport.send(Transport.java:96)	at io.socket.engineio.client.Socket.flush(Socket.java:608)	at io.socket.engineio.client.Socket.onDrain(Socket.java:599)	at io.socket.engineio.client.Socket.access$1000(Socket.java:30)	at io.socket.engineio.client.Socket$6.call(Socket.java:294)	at io.socket.emitter.Emitter.emit(Emitter.java:117)	at io.socket.engineio.client.transports.WebSocket$2$1.run(WebSocket.java:160)	at io.socket.thread.EventThread$2.run(EventThread.java:75)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)	at java.lang.Thread.run(Thread.java:818)