Graceful shutdown | crawler | Spatie

 SPATIE

  Crawler
==========

spatie.be/open-source

  [Docs](https://spatie.be/docs)  [Crawler](https://spatie.be/docs/crawler/v9)  Advanced-usage  Graceful shutdown

 Version   v9

 Other versions for crawler [v9](https://spatie.be/docs/crawler/v9)

- [ Introduction ](https://spatie.be/docs/crawler/v9/introduction)
- [ Installation & setup ](https://spatie.be/docs/crawler/v9/installation-setup)
- [ Support us ](https://spatie.be/docs/crawler/v9/support-us)
- [ Questions and issues ](https://spatie.be/docs/crawler/v9/questions-issues)
- [ Changelog ](https://spatie.be/docs/crawler/v9/changelog)
- [ About us ](https://spatie.be/docs/crawler/v9/about-us)

Basic usage
-----------

- [ Your first crawl ](https://spatie.be/docs/crawler/v9/basic-usage/starting-your-first-crawl)
- [ Crawl responses ](https://spatie.be/docs/crawler/v9/basic-usage/handling-crawl-responses)
- [ Using observers ](https://spatie.be/docs/crawler/v9/basic-usage/using-observers)
- [ Collecting URLs ](https://spatie.be/docs/crawler/v9/basic-usage/collecting-urls)
- [ Filtering URLs ](https://spatie.be/docs/crawler/v9/basic-usage/filtering-urls)
- [ Testing ](https://spatie.be/docs/crawler/v9/basic-usage/testing)
- [ Tracking progress ](https://spatie.be/docs/crawler/v9/basic-usage/tracking-progress)

Configuring the crawler
-----------------------

- [ Concurrency & throttling ](https://spatie.be/docs/crawler/v9/configuring-the-crawler/crawl-behavior)
- [ Limits ](https://spatie.be/docs/crawler/v9/configuring-the-crawler/setting-crawl-limits)
- [ Extracting resources ](https://spatie.be/docs/crawler/v9/configuring-the-crawler/extracting-resources)
- [ Configuring requests ](https://spatie.be/docs/crawler/v9/configuring-the-crawler/configuring-requests)
- [ Response filtering ](https://spatie.be/docs/crawler/v9/configuring-the-crawler/handling-responses)
- [ Respecting robots.txt ](https://spatie.be/docs/crawler/v9/configuring-the-crawler/respecting-robots-txt)

Advanced usage
--------------

- [ JavaScript rendering ](https://spatie.be/docs/crawler/v9/advanced-usage/rendering-javascript)
- [ Custom link extraction ](https://spatie.be/docs/crawler/v9/advanced-usage/extracting-custom-links)
- [ Custom request handlers ](https://spatie.be/docs/crawler/v9/advanced-usage/custom-request-handlers)
- [ Crawling across requests ](https://spatie.be/docs/crawler/v9/advanced-usage/crawling-across-requests)
- [ Custom crawl queue ](https://spatie.be/docs/crawler/v9/advanced-usage/using-a-custom-crawl-queue)
- [ Graceful shutdown ](https://spatie.be/docs/crawler/v9/advanced-usage/graceful-shutdown)

 Graceful shutdown
=================

When running the crawler as a long-lived CLI process, you may want to stop it cleanly with `Ctrl+C` (SIGINT) or `SIGTERM` instead of killing it mid-request.

The crawler automatically registers signal handlers when the `pcntl` extension is available. When a signal is received:

1. The crawler stops yielding new requests
2. Any in-flight requests complete normally
3. The `finishedCrawling()` method on your observers is called with `FinishReason::Interrupted`
4. The `start()` method returns `FinishReason::Interrupted`

```
use Spatie\Crawler\Crawler;
use Spatie\Crawler\Enums\FinishReason;

$reason = Crawler::create('https://example.com')
    ->start();

if ($reason === FinishReason::Interrupted) {
    echo "Crawl was interrupted by a signal\n";
}
```

No configuration is needed. This works out of the box on any system where the `pcntl` PHP extension is loaded.

This is especially useful when combining with [crawling across requests](/docs/crawler/v9/advanced-usage/crawling-across-requests). A graceful shutdown ensures that the crawl queue remains in a consistent state, so you can resume crawling later.