multica-ai/multica · error

close temp config file: %w

Error message

close temp config file: %w

What it means

The temp file's Close() returned an error after a successful write. On local filesystems this is rare; on NFS or FUSE mounts close can surface deferred write errors (data could not be flushed). The temp file is removed and the save aborted, leaving the previous config untouched.

Source

Thrown at server/internal/cli/config.go:366

	data, err := json.MarshalIndent(cfg, "", "  ")
	if err != nil {
		return fmt.Errorf("encode CLI config: %w", err)
	}

	// Write to a temp file in the same directory, then rename for atomicity.
	tmp, err := os.CreateTemp(dir, ".config-*.json.tmp")
	if err != nil {
		return fmt.Errorf("create temp config file: %w", err)
	}
	tmpPath := tmp.Name()
	if _, err := tmp.Write(append(data, '\n')); err != nil {
		tmp.Close()
		os.Remove(tmpPath)
		return fmt.Errorf("write temp config file: %w", err)
	}
	if err := tmp.Close(); err != nil {
		os.Remove(tmpPath)
		return fmt.Errorf("close temp config file: %w", err)
	}
	if err := os.Chmod(tmpPath, 0o600); err != nil {
		os.Remove(tmpPath)
		return fmt.Errorf("chmod temp config file: %w", err)
	}
	if err := os.Rename(tmpPath, path); err != nil {
		os.Remove(tmpPath)
		return fmt.Errorf("rename config file: %w", err)
	}
	return nil
}

View on GitHub (pinned to 2c0912b6ec)

Solutions

1. Move the config storage to a local filesystem or fix the network mount
2. Check system logs for the underlying I/O error
3. Retry after remounting the filesystem read-write and healthy
4. Verify quota limits if the mount enforces per-user quotas at flush

if err := cli.SaveCLIConfig(cfg); err != nil && strings.Contains(err.Error(), "close temp config file") {
	// likely network-filesystem flush failure; retry after remount or move root to local disk
}

When it happens

Trigger: Saving the config onto an NFS/FUSE mount where flushing at close fails; a filesystem returning EIO at flush time after a device error.

Common situations: MULTICA_TASK_CONFIG_ROOT on network storage; laptops with failing disks; fuse overlay filesystems with quota enforcement at flush.

Related errors

• read --%s-file: %w
• write temp config file: %w
• Invalid desktop runtime config: expected a JSON object
• Unsupported desktop runtime config schemaVersion: expected 1
• Invalid desktop runtime config: ${field} must be a non-empty

AI-assisted analysis of multica-ai/multica@2c0912b6ec (2026-08-15). Data as JSON: /api/errors/f8aa7ab1b9dd6c0b. Report an issue: GitHub.