{"record":{"id":"a157e76772113fe0","repo":"nautechsystems/nautilus_trader","slug":"failed-to-commit-transaction-e","errorCode":null,"errorMessage":"Failed to commit transaction: {e}","messagePattern":"Failed to commit transaction: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/infrastructure/src/sql/queries.rs","lineNumber":456,"sourceCode":"            .bind(snapshot.linked_order_ids.map(|x| x.iter().map(ToString::to_string).collect::<Vec<String>>()))\n            .bind(snapshot.parent_order_id.map(|x| x.to_string()))\n            .bind(snapshot.exec_algorithm_id.map(|x| x.to_string()))\n            .bind(snapshot.exec_algorithm_params.map(|x| serde_json::to_value(x).unwrap()))\n            .bind(snapshot.exec_spawn_id.map(|x| x.to_string()))\n            .bind(snapshot.tags.map(|x| x.iter().map(ToString::to_string).collect::<Vec<String>>()))\n            .bind(snapshot.init_id.to_string())\n            .bind(snapshot.ts_init.to_string())\n            .bind(snapshot.ts_last.to_string())\n            .bind(snapshot.activation_price.map(|x| x.to_string()))\n            .execute(&mut *transaction)\n            .await\n            .map(|_| ())\n            .map_err(|e| anyhow::anyhow!(\"Failed to insert into order table: {e}\"))?;\n\n        transaction\n            .commit()\n            .await\n            .map_err(|e| anyhow::anyhow!(\"Failed to commit transaction: {e}\"))\n    }\n\n    /// Loads an `OrderSnapshot` entry by client order ID via the provided `pool`.\n    ///\n    /// # Errors\n    ///\n    /// Returns an error if the SQL SELECT or deserialization fails.\n    pub async fn load_order_snapshot(\n        pool: &PgPool,\n        client_order_id: &ClientOrderId,\n    ) -> anyhow::Result<Option<OrderSnapshot>> {\n        sqlx::query_as::<_, OrderSnapshotRow>(r#\"SELECT * FROM \"order\" WHERE client_order_id = $1\"#)\n            .bind(client_order_id.to_string())\n            .fetch_optional(pool)\n            .await\n            .map(|row| row.map(|row| row.0))\n            .map_err(|e| anyhow::anyhow!(\"Failed to load order snapshot: {e}\"))\n    }","sourceCodeStart":438,"sourceCodeEnd":474,"githubUrl":"https://github.com/nautechsystems/nautilus_trader/blob/18893faf8b356be3320add8de2f861b0b647cf06/crates/infrastructure/src/sql/queries.rs#L438-L474","documentation":"Raised by `add_order_snapshot` when `transaction.commit()` fails after both the trader and order inserts succeeded. This means the transaction could not be finalized — typically because the connection was lost between the last statement and the commit — and PostgreSQL will roll the work back. No snapshot is persisted.","triggerScenarios":"Calling `add_order_snapshot` and having the connection drop, the statement timeout fire, or the server terminate the transaction between the final INSERT and `commit()`. Also occurs if the transaction was already aborted by a prior silent error or the pool connection was returned/closed prematurely.","commonSituations":"Network flakiness between app and database; long-running transaction hitting `idle_in_transaction_session_timeout`; Kubernetes pod eviction or DB failover mid-write; connection pool max-lifetime closing the connection under the transaction.","solutions":["Retry the entire `add_order_snapshot` call — the transaction is atomic, so a full retry is safe once connectivity is restored.","Check database connectivity, failover status, and timeout settings (idle-in-transaction, statement_timeout).","Increase pool `max_lifetime`/`idle_timeout` so connections are not recycled while a transaction is in flight.","Inspect the wrapped `{e}` for server-side messages (e.g. serialization failure) and add retry-on-conflict logic if needed."],"exampleFix":"// before: no retry, transient commit failures propagate\nadd_order_snapshot(&pool, &snapshot).await?;\n\n// after: retry whole transactional write with backoff\nlet mut delay = Duration::from_millis(200);\nwhile let Err(e) = add_order_snapshot(&pool, &snapshot).await {\n    if !is_transient(&format!(\"{e:#}\")) { return Err(e); }\n    tokio::time::sleep(delay).await;\n    delay *= 2;\n}","handlingStrategy":"retry","validationCode":"// Pre-flight connectivity check before starting transactional writes\nsqlx::query(\"SELECT 1\").execute(pool).await\n    .map_err(|e| anyhow::anyhow!(\"database unreachable before snapshot write: {e}\"))?;","typeGuard":null,"tryCatchPattern":"let mut delay = std::time::Duration::from_millis(200);\nloop {\n    match add_order_snapshot(&pool, &snapshot).await {\n        Ok(()) => break,\n        Err(e) if is_transient(&format!(\"{e:#}\")) => {\n            tokio::time::sleep(delay).await;\n            delay = (delay * 2).min(std::time::Duration::from_secs(5));\n        }\n        Err(e) => return Err(e),\n    }\n}","preventionTips":["Set pool max_lifetime/idle_timeout longer than the longest transaction.","Raise idle_in_transaction_session_timeout if writes are slow.","Implement exponential-backoff retries for whole-transaction writes.","Alert on DB failover events that can kill in-flight commits."],"tags":["database","postgres","transaction","commit","rust"],"backgroundTag":"database-write-failed","analyzedSha":"18893faf8b356be3320add8de2f861b0b647cf06","analyzedAt":"2026-09-08T20:49:34.690Z","contentChangedAt":"2026-09-08T20:49:34.690Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}