Thursday, December 5, 2019

java.net.ConnectException: Connection refused (Connection refused)

java.net.ConnectException: Connection refused (Connection refused)
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
        at java.net.Socket.connect(Socket.java:607)
        at java.net.Socket.connect(Socket.java:556)
        at java.net.Socket.<init>(Socket.java:452)
        at java.net.Socket.<init>(Socket.java:262)


This error occurs when the client cannot reach the server.

1. The server is down.
2. You are using a wrong IP address.
3. The server is not listening on the port.
4. Firewall or proxy blocks the connection.

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