{"record":{"id":"68873457874c23c9","repo":"nautechsystems/nautilus_trader","slug":"failed-to-set-pool-snapshot-validation-state-e","errorCode":null,"errorMessage":"Failed to set pool snapshot validation state: {e}","messagePattern":"Failed to set pool snapshot validation state: (.+?)","errorType":"exception","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"crates/adapters/blockchain/src/cache/database.rs","lineNumber":2601,"sourceCode":"            UPDATE pool_snapshot\n            SET validation_state = $6\n            WHERE chain_id = $1\n            AND pool_identifier = $2\n            AND block = $3\n            AND transaction_index = $4\n            AND log_index = $5\n            \",\n        )\n        .bind(chain_id as i32)\n        .bind(pool_identifier.as_ref())\n        .bind(block as i64)\n        .bind(transaction_index as i32)\n        .bind(log_index as i32)\n        .bind(state)\n        .execute(&self.pool)\n        .await\n        .map(|_| ())\n        .map_err(|e| anyhow::anyhow!(\"Failed to set pool snapshot validation state: {e}\"))\n    }\n\n    /// Reads the stored `validation_state` for the snapshot at the given watermark.\n    ///\n    /// Returns `None` when no snapshot row exists at that position. Used to report the persisted\n    /// verdict (rather than re-deriving `replay`) when on-chain validation cannot reach the block.\n    ///\n    /// # Errors\n    ///\n    /// Returns an error if the database query fails.\n    pub async fn get_pool_snapshot_validation_state(\n        &self,\n        chain_id: u32,\n        pool_identifier: &PoolIdentifier,\n        block: u64,\n        transaction_index: u32,\n        log_index: u32,\n    ) -> anyhow::Result<Option<String>> {","sourceCodeStart":2583,"sourceCodeEnd":2619,"githubUrl":"https://github.com/nautechsystems/nautilus_trader/blob/18893faf8b356be3320add8de2f861b0b647cf06/crates/adapters/blockchain/src/cache/database.rs#L2583-L2619","documentation":"This wraps a SQLx failure from the UPDATE that sets a snapshot row's `validation_state` (valid/invalid) at a given (pool, block, tx_index, log_index) watermark. The statement executed but the driver returned an error; the library re-tags it so the failure is attributable to the validation-state update.","triggerScenarios":"Calling the snapshot validation-state setter while the DB connection is broken, the row was concurrently deleted (foreign-key constraint violation if one exists), schema drift removed/renamed the `validation_state` column, or the pool hit connection limits.","commonSituations":"Database failover mid-run; concurrent snapshot cleanup job deleting rows while validation updates them; migrations not applied after upgrade; Postgres `too_many_connections` under heavy adapter load.","solutions":["Confirm the target snapshot row still exists at the given watermark (concurrent deletion is the usual cause).","Check DB connectivity and apply pending migrations so the `validation_state` column exists.","Inspect the chained `{e}` for the exact SQLSTATE (e.g. 23503 foreign key, 42703 undefined column).","Add retry-with-backoff around the update for transient connection errors."],"exampleFix":"// before: single attempt\nstate_store.set_validation_state(...).await?;\n// after: bounded retry for transient errors\nfor attempt in 0..3 {\n    match state_store.set_validation_state(...).await {\n        Ok(()) => break,\n        Err(e) if attempt < 2 && is_transient(&e) => tokio::time::sleep(backoff(attempt)).await,\n        Err(e) => return Err(e),\n    }\n}","handlingStrategy":"try-catch","validationCode":"let exists: bool = sqlx::query_scalar(\n    \"SELECT EXISTS(SELECT 1 FROM pool_snapshots WHERE pool_identifier=$1 AND block=$2 AND transaction_index=$3 AND log_index=$4)\")\n    .bind(pool_id).bind(block).bind(tx_idx).bind(log_idx)\n    .fetch_one(&db).await?;\nif !exists { return Err(\"snapshot row gone; skip validation update\"); }","typeGuard":null,"tryCatchPattern":"for attempt in 0..3 {\n    match store.set_validation_state(...).await {\n        Ok(()) => break,\n        Err(e) if attempt < 2 => { tokio::time::sleep(backoff(attempt)).await; }\n        Err(e) => return Err(e),\n    }\n}","preventionTips":["Retry transient SQLx errors (connection reset, timeouts) with backoff.","Coordinate snapshot cleanup jobs with validation writes to avoid concurrent deletes.","Run migrations on deploy so validation_state column always exists."],"tags":["database","postgres","sqlx","write-failed"],"backgroundTag":"database-write-failed","analyzedSha":"18893faf8b356be3320add8de2f861b0b647cf06","analyzedAt":"2026-09-08T20:49:34.690Z","contentChangedAt":"2026-09-08T20:49:34.690Z","schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}