{"record":{"id":"15aa9f0efa2c23a0","repo":"influxdata/influxdb","slug":"write-buffer-error-0-manager","errorCode":null,"errorMessage":"write buffer error: {0}","messagePattern":"write buffer error: (.+?)","errorType":"exception","errorClass":"ProcessingEngineError","httpStatus":null,"severity":"error","filePath":"influxdb3_processing_engine/src/manager.rs","lineNumber":15,"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}\")]","sourceCodeStart":1,"sourceCodeEnd":33,"githubUrl":"https://github.com/influxdata/influxdb/blob/06200ef96ba82c5f6727e5038a83af8e722c6875/influxdb3_processing_engine/src/manager.rs#L1-L33","documentation":"ProcessingEngineError::WriteBufferError with #[from] influxdb3_write::write_buffer::Error — automatic conversion of write-buffer failures. It surfaces when a processing-engine operation interacts with the write buffer (e.g. WAL-replayed trigger setup or writes routed through the buffer) and that layer fails.","triggerScenarios":"Operations that resolve or write through the WriteBuffer while setting up/running triggers, when influxdb3_write::write_buffer::Error is returned (unknown database/table, invalid write, buffer closed).","commonSituations":"Trigger configured against a table that doesn't exist; write buffer backend disk issues; calling processing-engine APIs before the write buffer is fully initialized.","solutions":["Read the inner write_buffer::Error to find the root cause (missing db/table vs IO).","Ensure the database and measurement/table referenced by the trigger exist.","Retry after the write buffer is healthy if the cause was transient (disk, lock).","Upgrade/verify influxdb3_write compatibility if the error indicates an unsupported operation."],"exampleFix":null,"handlingStrategy":"validation","validationCode":"await assertDbAndTableExist(dbName, tableName); // check via SHOW DATABASES / SHOW TABLES first","typeGuard":null,"tryCatchPattern":"try {\n  await setupTrigger(trigger);\n} catch (e) {\n  if (String(e).startsWith('write buffer error')) {\n    logRootCause(e); // parse inner influxdb3_write error\n  } else { throw e; }\n}","preventionTips":["Verify referenced databases/tables exist before creating triggers.","Monitor write-buffer disk usage and health.","Ensure the node finishes startup/WAL init before calling engine APIs."],"tags":["processing-engine","write-buffer","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"}