{"record":{"id":"06818bc15e71b70e","repo":"spacedriveapp/spacedrive","slug":"failed-to-read-response-06818b","errorCode":null,"errorMessage":"Failed to read response: {}","messagePattern":"Failed to read response: (.+?)","errorType":"exception","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"core/src/service/network/transports/sync.rs","lineNumber":290,"sourceCode":"\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\",\n\t\t\t\t\ttarget_device\n\t\t\t\t))\n\t\t\t}\n\t\t};\n\n\t\t// Deserialize response\n\t\tlet response: SyncMessage = serde_json::from_slice(&resp_buf)\n\t\t\t.map_err(|e| anyhow::anyhow!(\"Failed to deserialize sync response: {}\", e))?;","sourceCodeStart":272,"sourceCodeEnd":308,"githubUrl":"https://github.com/spacedriveapp/spacedrive/blob/6dfeccf2113039e35f2ce735f945e70dc3e4ea45/core/src/service/network/transports/sync.rs#L272-L308","documentation":"The response length header arrived but recv.read_exact for the body failed before resp_len bytes were read: the response was truncated by a dropped connection, or the peer's header claimed more bytes than it sent. The length is untrusted input taken from the wire.","triggerScenarios":"Connection lost while a large response was in flight; a peer bug writing a wrong length prefix; peer aborted mid-serialization of a big sync response.","commonSituations":"Large sync responses (big diffs, many records) over unstable links.","solutions":["Retry the request; truncation is transient when the link is the cause","If reproducible with one peer, capture that peer's outbound serialization for the message and check the length prefix it writes","For large payloads, prefer chunked or paginated sync responses instead of one big frame"],"exampleFix":null,"handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":"if recv.read_exact(&mut resp_buf).await.is_err() {\n    // truncated response: retry the request; if it repeats with one peer, inspect its serialization\n}","preventionTips":["Prefer chunked or paginated responses for large sync payloads","Cap resp_len before allocating to avoid huge buffers from a bad header","Retry with backoff; persistent truncation points to a peer bug"],"tags":["network","sync","quic","read","truncation"],"backgroundTag":null,"analyzedSha":"6dfeccf2113039e35f2ce735f945e70dc3e4ea45","analyzedAt":"2026-08-16T11:26:17.074Z","schemaVersion":2},"datasetVersion":"2026-08-16T13:17:31.715Z"}