Recently encountered a weird issue with cPanel DNS Zone Editor that wasn’t mentioned anywhere on cPanel official documentation nor their forums, so I decided to write a quick guide for anyone else that might experience this issue in the future.
The problem was that cPanel was not accepting CNAME record for a subdomain with the following error message:
Error: The request failed. (Error ID: xxxxxx) Ask your hosting provider to research this error in cPanel & WHM's main error log.
As I suspected the problem was with that domain’s DNS zone and after troubleshooting the issue I noticed that the line that was causing this problem is a TXT record on that same subdomain:
After removing this TXT record from the DNS zone the CNAME could be successfully added.
Later I was also able to reproduce the issue if the domain already has a CNAME record, cPanel does not allow TXT records to be added:
![2023 08 28 12 15 - node[175421]: pthread_create: Resource temporarily unavailable](https://i0.wp.com/administrator.pejcic.rs/wp-content/uploads/2023/08/2023-08-28_12-15.png?resize=344%2C194&ssl=1 "node[175421]: pthread_create: Resource temporarily unavailable")
