ai/docs/09-troubleshooting/07-unclosed-streams.mdx

AI SDK by Vercel - The AI Toolkit for TypeScript and JavaScript

---
title: Unclosed Streams
description: Troubleshooting errors related to unclosed streams.
---

# Unclosed Streams

Sometimes streams are not closed properly, which can lead to unexpected behavior. The following are some common issues that can occur when streams are not closed properly.

## Issue

The streamable UI has been slow to update.

## Solution

This happens when you create a streamable UI using [`createStreamableUI`](/docs/reference/ai-sdk-rsc/create-streamable-ui) and fail to close the stream.
In order to fix this, you must ensure you close the stream by calling the [`.done()`](/docs/reference/ai-sdk-rsc/create-streamable-ui#done) method.
This will ensure the stream is closed.

```tsx file='app/actions.tsx'
import { createStreamableUI } from '@ai-sdk/rsc';

const submitMessage = async () => {
  'use server';

  const stream = createStreamableUI('1');

  stream.update('2');
  stream.append('3');
  stream.done('4'); // [!code ++]

  return stream.value;
};
```