{"record":{"id":"d1470819c56a5002","repo":"influxdata/influxdb","slug":"wal-error-0","errorCode":null,"errorMessage":"wal error: {0}","messagePattern":"wal error: (.+?)","errorType":"exception","errorClass":"ProcessingEngineError","httpStatus":null,"severity":"error","filePath":"influxdb3_processing_engine/src/manager.rs","lineNumber":18,"sourceCode":"use crate::environment::PluginEnvironmentError;\nuse influxdb3_catalog::CatalogError;\nuse influxdb3_id::{DbId, TriggerId};\nuse std::fmt::Debug;\nuse thiserror::Error;\n\n#[derive(Debug, Error)]\npub enum ProcessingEngineError {\n    #[error(\"database not found: {0}\")]\n    DatabaseNotFound(String),\n\n    #[error(\"catalog update error: {0}\")]\n    CatalogUpdateError(#[from] CatalogError),\n\n    #[error(\"write buffer error: {0}\")]\n    WriteBufferError(#[from] influxdb3_write::write_buffer::Error),\n\n    #[error(\"wal error: {0}\")]\n    WalError(#[from] influxdb3_wal::Error),\n\n    #[error(\"plugin error: {0}\")]\n    PluginError(#[from] crate::plugins::PluginError),\n\n    #[error(\"processing engine trigger {trigger_id} not found in database {db_id}\")]\n    TriggerNotFound { db_id: DbId, trigger_id: TriggerId },\n\n    #[error(\"request trigger not found\")]\n    RequestTriggerNotFound,\n\n    #[error(\"request handler for trigger down\")]\n    RequestHandlerDown,\n\n    #[error(\"error installing python packages: {0}\")]\n    PythonPackageError(PluginEnvironmentError),\n\n    #[error(\"{0}\")]","sourceCodeStart":1,"sourceCodeEnd":36,"githubUrl":"https://github.com/influxdata/influxdb/blob/06200ef96ba82c5f6727e5038a83af8e722c6875/influxdb3_processing_engine/src/manager.rs#L1-L36","documentation":"ProcessingEngineError::WalError with #[from] influxdb3_wal::Error — automatic conversion of WAL-layer failures. Indicates the write-ahead log subsystem returned an error while the processing engine was performing work that touches the WAL (flushes, replay, trigger scheduling).","triggerScenarios":"Trigger processing or WAL replay paths where influxdb3_wal::Error occurs (WAL file corruption, flush failure, WAL directory inaccessible).","commonSituations":"Disk full on the WAL volume; corrupted/interrupted WAL segment after a crash; permission changes on the WAL directory; node restored from a partial snapshot.","solutions":["Check the inner influxdb3_wal::Error message to identify the failing WAL file or operation.","Verify the WAL directory exists, is writable, and has free disk space.","Back up and inspect/repair corrupted WAL segments; do not delete them blindly.","Restart the node after fixing disk/permission issues so WAL replay can resume cleanly."],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":"// preflight: WAL dir writable and has space\nfs.accessSync(walDir, fs.constants.W_OK);\nif (fs.statSync(walDir).sizeFreeHint < threshold) throw new Error('WAL disk low');","typeGuard":null,"tryCatchPattern":"try {\n  await runEngineOperation();\n} catch (e) {\n  if (String(e).startsWith('wal error')) {\n    alertOps('WAL failure — check disk and WAL segment integrity');\n  } else { throw e; }\n}","preventionTips":["Monitor WAL disk free space and alert before exhaustion.","Back up WAL segments; never hand-delete after crashes.","Keep WAL directory permissions stable across deploys."],"tags":["processing-engine","wal","thiserror"],"backgroundTag":"database-write-failed","analyzedSha":"06200ef96ba82c5f6727e5038a83af8e722c6875","analyzedAt":"2026-09-19T12:55:30.003Z","contentChangedAt":"2026-09-19T12:55:30.003Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}