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To my understanding, the socket connection timeout is controlled by the TCP transport, which uses Retransmission Timeouts (RTOs). if the the ack does not come back before timer expires, the connect request (Sync) will be retransmitted, and the RTO will be doubled.
So what is the functionality of connection timeout in Java socket when we call Socket.connect(endpoint, connectTimeout)
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connection timeout — a time period in which a client should establish a connection with a server. socket timeout — a maximum time of inactivity between two data packets when exchanging data with a server.
SocketTimeoutException: Connection timed out) means that it takes too long to get respond from other device and your request expires before getting response.
Answer: Just set the SO_TIMEOUT on your Java Socket, as shown in the following sample code: String serverName = "localhost"; int port = 8080; // set the socket SO timeout to 10 seconds Socket socket = openSocket(serverName, port); socket. setSoTimeout(10*1000);
From the client side, the “read timed out” error happens if the server is taking longer to respond and send information. This could be due to a slow internet connection, or the host could be offline. From the server side, it happens when the server takes a long time to read data compared to the preset timeout.
So what is the functionality of connection timeout in Java socket when we call Socket.connect(endpoint, connectTimeout)
It sets an overall timeout for the connection to have been established; i.e. it says how long the application is prepared to wait for all of the packet-level timeouts, retransmissions, etc to succeed (or not) before giving up.
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