JuliusBrussee/caveman · error

open memories db: %w

Error message

open memories db: %w

What it means

Error "open memories db: %w" thrown in JuliusBrussee/caveman.

Source

Thrown at mem/store.go:118

		}
		if err := os.MkdirAll(dir, 0o700); err != nil {
			return nil, fmt.Errorf("create %s: %w", dir, err)
		}
		memPath = filepath.Join(dir, "mem.db")
		ccrPath = filepath.Join(dir, "ccr.db")
	}
	canonicalMemPath, err := ccr.PrepareSQLitePathCanonical(memPath)
	if err != nil {
		return nil, fmt.Errorf("secure memories db: %w", err)
	}
	// Same embedded-SQLite-behind-a-multi-process-CLI discipline as the recovery
	// store: a single writer connection plus busy_timeout(5000)+WAL. Several
	// cavemem processes (and the MCP server) share one mem.db, and the JS client
	// fires Promise.all(facts.map(remember)); without this, concurrent writes
	// returned SQLITE_BUSY and were silently dropped. See ccr.SQLiteDSN.
	db, err := sql.Open("sqlite", ccr.SQLiteDSN(canonicalMemPath))
	if err != nil {
		return nil, fmt.Errorf("open memories db: %w", err)
	}
	db.SetMaxOpenConns(1)
	db.SetMaxIdleConns(1)
	// The cold-start migration is multi-statement DDL; under a fan-out of fresh
	// processes it can outlast a single busy_timeout, so retry it on SQLITE_BUSY
	// (runtime writes rely on busy_timeout alone). Both steps are idempotent.
	if err := ccr.RetryOnBusy(func() error { _, e := db.Exec(memSchema); return e }); err != nil {
		_ = db.Close()
		return nil, fmt.Errorf("migrate memories db: %w", err)
	}
	if err := ccr.RetryOnBusy(func() error { return migrateMemorySchema(db) }); err != nil {
		_ = db.Close()
		return nil, fmt.Errorf("migrate memories db: %w", err)
	}
	store, err := ccr.Open(ccrPath)
	if err != nil {
		_ = db.Close()
		return nil, fmt.Errorf("open ccr: %w", err)

View on GitHub (pinned to 27d5a3981a)

Solutions

1. Fix opening the memories database and retry.

When it happens

Trigger: Thrown at mem/store.go:118 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of JuliusBrussee/caveman@27d5a3981a (2026-08-15). Data as JSON: /api/errors/ce101370e74310ce. Report an issue: GitHub.