---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/52072#article
headline: "52072: Client mqtt connection not created or closed"
url: https://www.twilio.com/docs/api/errors/52072
inLanguage: en
dateModified: 2026-03-11T20:43:38.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 52072: Client mqtt connection not created or closed

Log Level: WARNING

## Description

### Possible causes

* Most probably mqtt client had disconnected but registration didn't removed yet.

### Possible solutions

* Check this warning happens only once for certain registration id.