Receiving error when deleting monitor: Timeout acquiring a connection. The pool is probably full. @louislam #4109

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opened 2026-02-28 03:51:28 -05:00 by deekerman · 1 comment

deekerman commented

2026-02-28 03:51:28 -05:00

Owner

Originally created by @SomeoneVeryCool on GitHub (Apr 28, 2025).

I do not see a similar issue regarding this.

🛡️ Security Policy

I have read and agree to Uptime Kuma's Security Policy.

📝 Description

Recently I had to delete a monitor from our uptime-kuma instance which made uptime blow up with every monitor reporting "[DOWN] Knex: Timeout acquiring a connection. The pool is probably full. Are you missing a .transacting(trx) call?"

👟 Reproduction steps

Simply Deleting a monitor.

👀 Expected behavior

Monitor delete with no issues and everything runs as normal.

😓 Actual Behavior

Takes a while and cause multiple monitors to go down.

🐻 Uptime-Kuma Version

1.23.16

💻 Operating System and Arch

Ubuntu 24.04 LTS

🌐 Browser

Firefox 137.0.2

🖥️ Deployment Environment

Runtime Environment:
- Node.js: Version 18.19.1 (LTS: No)
- NPM: Version 9
Database:
- SQLite: Embedded
Database Storage:
- Filesystem:
  - Linux: ext4
- Storage Medium: NVMe
Uptime Kuma Setup:
- Number of monitors: 300+

📝 Relevant log output

"[DOWN] Knex: Timeout acquiring a connection. The pool is probably full. Are you missing a .transacting(trx) call?"

Originally created by @SomeoneVeryCool on GitHub (Apr 28, 2025). ### 📑 I have found these related issues/pull requests I do not see a similar issue regarding this. ### 🛡️ Security Policy - [x] I have read and agree to Uptime Kuma's [Security Policy](https://github.com/louislam/uptime-kuma/security/policy). ### 📝 Description Recently I had to delete a monitor from our uptime-kuma instance which made uptime blow up with every monitor reporting "[DOWN] Knex: Timeout acquiring a connection. The pool is probably full. Are you missing a .transacting(trx) call?" ### 👟 Reproduction steps Simply Deleting a monitor. ### 👀 Expected behavior Monitor delete with no issues and everything runs as normal. ### 😓 Actual Behavior Takes a while and cause multiple monitors to go down. ### 🐻 Uptime-Kuma Version 1.23.16 ### 💻 Operating System and Arch Ubuntu 24.04 LTS ### 🌐 Browser Firefox 137.0.2 ### 🖥️ Deployment Environment - **Runtime Environment**: - Node.js: Version `18.19.1` (LTS: No) - NPM: Version `9` - **Database**: - SQLite: Embedded - **Database Storage**: - **Filesystem**: - Linux: ext4 - **Storage Medium**: NVMe - **Uptime Kuma Setup**: - Number of monitors: `300+` ### 📝 Relevant log output ```bash session "[DOWN] Knex: Timeout acquiring a connection. The pool is probably full. Are you missing a .transacting(trx) call?" ```