{"record":{"id":"da82961e28ac945e","repo":"cube-js/cube","slug":"unable-to-convert-message-length-to-a-suitable-mem","errorCode":null,"errorMessage":"Unable to convert message length to a suitable memory size","messagePattern":"Unable to convert message length to a suitable memory size","errorType":"exception","errorClass":"std::io::Error (ErrorKind::OutOfMemory)","httpStatus":null,"severity":"error","filePath":"rust/cubesql/pg-srv/src/buffer.rs","lineNumber":135,"sourceCode":"        return Err(Error::other(format!(\n            \"Unexpectedly small (<4) message size {length} for tag {message_tag:X?}\"\n        )));\n    }\n\n    if length > max_length {\n        return Err(Error::other(format!(\n            \"Message size {length} for tag {message_tag:X?} exceeds the maximum allowed size of {max_length} bytes\"\n        )));\n    }\n\n    trace!(\n        \"[pg] Receive package {:X?} with length {}\",\n        message_tag,\n        length\n    );\n\n    let length = usize::try_from(length - 4).map_err(|_| {\n        Error::new(\n            ErrorKind::OutOfMemory,\n            \"Unable to convert message length to a suitable memory size\",\n        )\n    })?;\n\n    let buffer = if length == 0 {\n        vec![0; 0]\n    } else {\n        let mut buffer = vec![0; length];\n        reader.read_exact(&mut buffer).await?;\n\n        buffer\n    };\n\n    let cursor = Cursor::new(buffer);\n\n    Ok(cursor)\n}","sourceCodeStart":117,"sourceCodeEnd":153,"githubUrl":"https://github.com/cube-js/cube/blob/7d981676b36392fec34088b9afab6bdcad40207c/rust/cubesql/pg-srv/src/buffer.rs#L117-L153","documentation":"While reading a PostgreSQL protocol message, the declared payload length (already validated against minimum and maximum bounds) could not be converted to usize::try_from(length - 4). On 64-bit targets this is effectively unreachable; on 32-bit builds it fires when a length-4 above usize::MAX leaves no room for the 4 header bytes already accounted for.","triggerScenarios":"Thrown at rust/cubesql/pg-srv/src/buffer.rs:135 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Run CubeSQL on a 64-bit platform, which is the supported deployment","If on 32-bit, lower the maximum message size so lengths stay within usize range"],"exampleFix":null,"handlingStrategy":"validation","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"7d981676b36392fec34088b9afab6bdcad40207c","analyzedAt":"2026-09-02T03:45:10.400Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T15:18:49.778Z"}