n8n Workflow Executions Queued — Showing “-1 Concurrent Executions” Limit
sxnitin
FREEOP

5 months ago

What I’ve Tried:

  • Restarted and redeployed the service

  • Cleared all queued executions

  • No major changes were made to the project before this started happening

Details:

  • Project: optimistic-prosperity

  • Service: Primary (n8n)

  • Environment: Production

  • Platform: Railway Free Tier

  • Tool: n8n (workflow automation)

Ask:

  • Has anyone faced this -1 concurrency issue?

  • Is this a bug or a platform limitation?

  • Any way to fix or work around it on the free plan?

Thanks in advance for the help

$10 Bounty

3 Replies

Railway
BOT

5 months ago

Hey there! We've found the following might help you get unblocked faster:

If you find the answer from one of these, please let us know by solving the thread!

phoenixauro
HOBBY

5 months ago

'-1 Concurrent Executions' means there is no configured upper limit. Which means unlimited concurrent executions for n8n.
I think your jobs are queuing because you are on the free plan and there are limited amount of cpu threads to execute jobs concurrently.

idiegea21
HOBBY

5 months ago

you need to add Redis and at least one worker to enable queue mode and control execution concurrency—or switch to a hosting environment (or plan) that supports these features.

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