{"record":{"id":"b491200b6ccdc925","repo":"influxdata/influxdb","slug":"updating-catalog-on-delete-of-last-cache-failed-you-will","errorCode":null,"errorMessage":"updating catalog on delete of last cache failed, you will need to delete the cache again on server restart","messagePattern":"updating catalog on delete of last cache failed, you will need to delete the cache again on server restart","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"influxdb3_write/src/write_buffer/mod.rs","lineNumber":128,"sourceCode":"    #[error(\"tried creating database named '{0}' that already exists\")]\n    DatabaseExists(String),\n\n    #[error(\"cannot write to soft-deleted database '{0}' - it is marked for deletion\")]\n    DatabaseDeleted(String),\n\n    #[error(\"tried accessing table that do not exist\")]\n    TableDoesNotExist,\n\n    #[error(\"table '{db_name}.{table_name}' already exists\")]\n    TableAlreadyExists {\n        db_name: Arc<str>,\n        table_name: Arc<str>,\n    },\n\n    #[error(\"tried accessing column with name ({0}) that does not exist\")]\n    ColumnDoesNotExist(String),\n\n    #[error(\n        \"updating catalog on delete of last cache failed, you will need to delete the cache \\\n        again on server restart\"\n    )]\n    DeleteLastCache(#[source] CatalogError),\n\n    #[error(\"error from wal: {0}\")]\n    WalError(#[from] influxdb3_wal::Error),\n\n    #[error(\"error in distinct value cache: {0}\")]\n    DistinctCacheError(#[from] distinct_cache::ProviderError),\n\n    #[error(\"cannot write to a compactor-only server\")]\n    NoWriteInCompactorOnly,\n\n    #[error(\"error: {0}\")]\n    AnyhowError(#[from] anyhow::Error),\n\n    #[error(\"write not allowed on internal database\")]","sourceCodeStart":110,"sourceCodeEnd":146,"githubUrl":"https://github.com/influxdata/influxdb/blob/06200ef96ba82c5f6727e5038a83af8e722c6875/influxdb3_write/src/write_buffer/mod.rs#L110-L146","documentation":"Wraps a CatalogError raised while updating the catalog during deletion of a last-value cache. The in-memory cache was likely removed but the catalog persist step failed, leaving the system in a state where the deletion must be retried. The message explicitly warns the delete will need to happen again after a server restart.","triggerScenarios":"Calling delete_last_cache when the catalog update/commit fails (e.g. persistence backend unavailable or catalog conflict).","commonSituations":"Catalog storage temporarily unavailable during cache deletion; race between cache deletion and other catalog mutations; crash/restart mid-deletion leaving a stale cache entry.","solutions":["Retry the delete_last_cache call","Restart the server and delete the cache again, as the message advises","Check the underlying CatalogError (via the #[source]) for the root cause","Verify catalog persistence backend health before retrying"],"exampleFix":"// before\n// single attempt, no retry\nbuffer.delete_last_cache(db, name)?;\n// after\nmatch buffer.delete_last_cache(db, name) {\n    Err(e) if matches!(e, Error::DeleteLastCache(_)) => {\n        // retry after restart / check catalog source error\n        log::warn!(\"last-cache delete needs retry: {e}\");\n    }\n    r => r?,\n}","handlingStrategy":"retry","validationCode":"// ensure catalog persistence is reachable before deleting\nif !catalog.health_check() {\n    return Err(\"catalog backend unavailable; postpone cache deletion\");\n}","typeGuard":"fn needs_cache_delete_retry(err: &WriteBufferError) -> bool {\n    matches!(err, WriteBufferError::DeleteLastCache(_))\n}","tryCatchPattern":"match buffer.delete_last_cache(db, name) {\n    Err(WriteBufferError::DeleteLastCache(src)) => {\n        log::warn!(\"catalog update failed ({src}); retry delete after restart\");\n    }\n    other => other?,\n}","preventionTips":["Verify catalog storage health before mutating caches","Retry deletions after restart, as the error message instructs","Inspect the #[source] CatalogError for the underlying cause"],"tags":["last-cache","catalog","delete","influxdb3"],"backgroundTag":"internal-invariant-violation","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"}