Executions in queue

Hello, I have some workflows that perform queries on a scraper that is hosted on Heroku. As the scraper uses Puppeteer (chromedriver), one query must be made at a time, due to server resource limitations. Currently, using Make, I have the option to check one status at a time. The executions are in a queue and one only starts when the previous one ends. How can I do the same on N8N self hosted?

Hi @pedrofnts :wave:

I’m not too sure I’m clear on what you’re looking for - are you looking to check the status of an execution while the workflow is still being executed? :thinking: Just want to make sure I’m on the same page!

Could you also let us know the following:

  • n8n version:
  • Database (default: SQLite):
  • n8n EXECUTIONS_PROCESS setting (default: own, main):
  • Running n8n via (Docker, npm, n8n cloud, desktop app):
  • Operating system:

Hello. My CRM sends cards every day at 00:00 with the user’s data and the refund number to be checked. I need the workflow executions to be queued. One only starts when the previous one ends.

  • n8n version: 1.8.2
  • Database (default: SQLite): default
  • n8n EXECUTIONS_PROCESS setting (default: own, main): default
  • Running n8n via (Docker, npm, n8n cloud, desktop app): Docker
  • Operating system: Ubuntu 22.04

Hi @pedrofnts :wave: Thanks for clarifying - you could use something like RabbitMQ to do this :+1: What you can do is send all requests straight to RabbitMQ and then process one by one from that queue. The RabbitMQ trigger has a parameter to choose the number of parallel executions, and for your use-case, you can set it to 1 :+1:


Hello. When a execution goes into “Wait” in N8N, the RabbitMQ trigger process the others. That’s not what I expect. Is there anyway to fix that?

Hi @pedrofnts :wave: I had a test without a wait node as well as with a longer wait node (as behaviour with a wait node of 65 seconds or more would be different), and saw the same behaviour as you. As there wouldn’t be a way in the trigger node to change how this works, I’m afraid that this is a feature request :see_no_evil: I’ll move this over to the right section of the forums - don’t forget to upvote as well!

For the moment, I wouldn’t be able to think of a workaround, either :bowing_man:

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