{"record":{"id":"25b3f80ecc2c7d8e","repo":"FyroxEngine/Fyrox","slug":"an-error-occurred-when-reading-data-from-socket","errorCode":null,"errorMessage":"An error occurred when reading data from socket: {err}","messagePattern":"An error occurred when reading data from socket: (.+?)","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"fyrox-core/src/net.rs","lineNumber":158,"sourceCode":"        loop {\n            let mut bytes = [0; 8192];\n            match self.stream.read(&mut bytes) {\n                Ok(bytes_count) => {\n                    if bytes_count == 0 {\n                        break;\n                    } else {\n                        self.rx_buffer.extend(&bytes[..bytes_count])\n                    }\n                }\n                Err(err) => match err.kind() {\n                    ErrorKind::WouldBlock => {\n                        break;\n                    }\n                    ErrorKind::Interrupted => {\n                        // Retry\n                    }\n                    _ => {\n                        Log::err(format!(\n                            \"An error occurred when reading data from socket: {err}\"\n                        ));\n\n                        self.rx_buffer.clear();\n\n                        return;\n                    }\n                },\n            }\n        }\n    }\n\n    pub fn process_input<M>(&mut self, mut func: impl FnMut(M))\n    where\n        M: DeserializeOwned,\n    {\n        self.receive_bytes();\n","sourceCodeStart":140,"sourceCodeEnd":176,"githubUrl":"https://github.com/FyroxEngine/Fyrox/blob/76c91aad8eca488ce527b1af707be8b3b24ad72d/fyrox-core/src/net.rs#L140-L176","documentation":"Logged in fyrox-core net.rs when reading from the TCP socket returns an unexpected io::Error. WouldBlock and Interrupted are handled separately (ignored/retried); any other error kind is logged, the receive buffer is cleared, and receive_bytes returns. This typically means the connection was dropped or reset.","triggerScenarios":"Peer closed the connection abruptly (ConnectionReset), network failure mid-read, socket closed unexpectedly while waiting for length-prefixed data in process_input or pop_message.","commonSituations":"Client kills the game process, network cable/wifi drop, server restart, NAT/firewall idle timeout, peer OS refusing the connection after crash.","solutions":["Detect the closed connection and remove/disconnect the peer instead of retrying","Implement an application-level keep-alive/ping to detect dead connections","Wrap reads so ConnectionReset/UnexpectedEof are treated as graceful disconnects","Check network stability (firewall, NAT timeouts) for long idle sessions"],"exampleFix":"// before\nLog::err(format!(\"An error occurred when reading data from socket: {err}\"));\nself.rx_buffer.clear();\n// after\nmatch err.kind() {\n    ErrorKind::ConnectionReset | ErrorKind::UnexpectedEof => self.disconnect(peer),\n    ErrorKind::WouldBlock | ErrorKind::Interrupted => {},\n    _ => { Log::warn(format!(\"socket read: {err}\")); self.disconnect(peer); }\n}","handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":"match stream.read(&mut buf) {\n    Ok(0) => disconnect(peer), // EOF\n    Ok(n) => handle(n),\n    Err(e) if e.kind() == ErrorKind::Interrupted || e.kind() == ErrorKind::WouldBlock => {},\n    Err(e) => { Log::warn(format!(\"socket: {e}\")); disconnect(peer); }\n}","preventionTips":["Treat ConnectionReset/EOF as normal disconnects, not crashes","Send periodic pings to keep NATs/firewalls from dropping idle connections","Buffer and re-sync on partial reads to avoid stream desync"],"tags":["network","tcp","socket","io"],"backgroundTag":"connection-refused","analyzedSha":"76c91aad8eca488ce527b1af707be8b3b24ad72d","analyzedAt":"2026-09-10T16:04:01.633Z","contentChangedAt":"2026-09-10T16:04:01.633Z","schemaVersion":2},"datasetVersion":"2026-09-16T09:17:16.951Z"}