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#2003·telegraf

The onLaunch callback of bot.launch(...) called in a wrong order causing "Error: Bot is not running!".

Author: Edgar-P-yanCreated Jul 1, 2024Updated May 5, 2026

Context

  • Telegraf.js Version: 4.16.3
  • Node.js Version: v22.2.0
  • Operating System: macOS 14.5

Minimal Example Code Reproducing the Issue

Both of these snippets reproduce the error:

typescript
const bot = new Telegraf(configs.get('BOT_TOKEN'));

bot.launch().catch((err) => console.error(err));
bot.stop();

// Error: Bot is not running!
//    at Telegraf.stop (./node_modules/telegraf/lib/telegraf.js:218:19)
typescript
const bot = new Telegraf(configs.get('BOT_TOKEN'));

new Promise((resolve) => {
  bot
    .launch(() => resolve(undefined))
    .catch((err) => {
      console.error(err);
    });
}).then(() => {
  bot.stop();
});

// Error: Bot is not running!
//    at Telegraf.stop (./node_modules/telegraf/lib/telegraf.js:218:19)

Expected Behavior

I expected the bot.stop() call not to throw an error. And also the onLaunch callback to be called after the long-polling/webhooks are initialized.

Current Behavior

The onLaunch callback is called before initialising the polling and webhooks https://github.com/telegraf/telegraf/blob/48a475d034ede5e01070a7e2b6b15dc48c3d3f9b/src/telegraf.ts#L286, which is why .stop() method throws an error if called in a little window of time between the onLaunch callback and when the bot actually launches.

An ugly workaround

Right now i do this to wait until the bot is actually launched and established the long polling and webhooks:

typescript
await new Promise((resolve, reject) => {
  const checkInterval = setInterval(() => {
    try {
	  // check the private properties to determine if the polling and webhooks are initialized
      if (bot['polling'] || bot['webhookServer']) {
        clearInterval(checkInterval);
        resolve(undefined);
      }
    } catch (e) {
      clearInterval(checkInterval);
      reject(e);
    }
  }, 500);

  bot.launch().catch((err) => {
    clearInterval(checkInterval);
    console.error(err);
  });
});

console.log('Now bot actually launched and listens to updates');

bot.stop(); // works fine, does not throw

Error Message and Logs (export DEBUG='telegraf:*')

// Error: Bot is not running!
//    at Telegraf.stop (./node_modules/telegraf/lib/telegraf.js:218:19)

Source: telegraf/telegraf

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