{"record":{"id":"5b2b2748a175583d","repo":"spacedriveapp/spacedrive","slug":"failed-to-read-response-length-5b2b27","errorCode":null,"errorMessage":"Failed to read response length: {}","messagePattern":"Failed to read response length: (.+?)","errorType":"exception","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"core/src/service/network/transports/sync.rs","lineNumber":282,"sourceCode":"\t\tsend.write_all(&len.to_be_bytes())\n\t\t\t.await\n\t\t\t.map_err(|e| anyhow::anyhow!(\"Failed to send length: {}\", e))?;\n\t\tsend.write_all(&req_bytes)\n\t\t\t.await\n\t\t\t.map_err(|e| anyhow::anyhow!(\"Failed to send request: {}\", e))?;\n\n\t\t// Properly close send stream\n\t\tsend.finish()\n\t\t\t.map_err(|e| anyhow::anyhow!(\"Failed to finish stream: {}\", e))?;\n\n\t\tdebug!(\"Sync request sent, waiting for response...\");\n\n\t\t// Read response with timeout\n\t\tlet result = timeout(Duration::from_secs(60), async {\n\t\t\tlet mut len_buf = [0u8; 4];\n\t\t\trecv.read_exact(&mut len_buf)\n\t\t\t\t.await\n\t\t\t\t.map_err(|e| anyhow::anyhow!(\"Failed to read response length: {}\", e))?;\n\t\t\tlet resp_len = u32::from_be_bytes(len_buf) as usize;\n\n\t\t\tdebug!(\"Receiving sync response of {} bytes\", resp_len);\n\n\t\t\tlet mut resp_buf = vec![0u8; resp_len];\n\t\t\trecv.read_exact(&mut resp_buf)\n\t\t\t\t.await\n\t\t\t\t.map_err(|e| anyhow::anyhow!(\"Failed to read response: {}\", e))?;\n\t\t\tOk::<_, anyhow::Error>(resp_buf)\n\t\t})\n\t\t.await;\n\n\t\tlet resp_buf = match result {\n\t\t\tOk(Ok(buf)) => buf,\n\t\t\tOk(Err(e)) => return Err(e),\n\t\t\tErr(_) => {\n\t\t\t\treturn Err(anyhow::anyhow!(\n\t\t\t\t\t\"Sync request timed out after 60s - peer {} not responding\",","sourceCodeStart":264,"sourceCodeEnd":300,"githubUrl":"https://github.com/spacedriveapp/spacedrive/blob/6dfeccf2113039e35f2ce735f945e70dc3e4ea45/core/src/service/network/transports/sync.rs#L264-L300","documentation":"Reading the 4-byte response length header failed inside the 60-second timeout window. The peer closed the stream without sending a response (clean EOF or stream reset), or the connection was lost before any response bytes arrived. The request reached a peer that did not answer.","triggerScenarios":"Peer accepted the stream but its sync handler errored and closed; peer process crashed mid-exchange; version skew where the peer does not implement the length-prefixed response protocol for this message type.","commonSituations":"Mixed versions during rollout; peers under load rejecting streams; handler panics on unexpected message variants.","solutions":["Check the peer's logs for a handler error or panic corresponding to the request","Verify both peers run compatible sync protocol versions and update them to match","Retry once; if the peer consistently closes without responding, mark it unavailable for this session"],"exampleFix":null,"handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":"match recv.read_exact(&mut len_buf).await {\n    Err(_) => {\n        // peer closed without responding: mark partner suspect, retry once, then back off\n    }\n    Ok(_) => { /* continue */ }\n}","preventionTips":["Keep both peers on compatible sync protocol versions","Log peer-side handler errors so closes without response are diagnosable","Use a per-partner failure counter to stop retrying a silent peer"],"tags":["network","sync","quic","read","protocol"],"backgroundTag":null,"analyzedSha":"6dfeccf2113039e35f2ce735f945e70dc3e4ea45","analyzedAt":"2026-08-16T11:26:17.074Z","schemaVersion":2},"datasetVersion":"2026-08-16T13:17:31.715Z"}