[BUG]: RuntimeError: dictionary changed size during iteration #15182
Description
Tracer Version(s)
3.18.0
Python Version(s)
3.13.3
Pip Version(s)
25.3
Bug Report
We're seeing this specifically in code that makes many concurrent calls to create spans with a ThreadPoolExecutor. Just started seeing it when upgrading from 3.16.2 yesterday.
Reproduction Code
No response
Error Logs
No response
Libraries in Use
django==5.2.8
psycopg2==2.9.11
ddtrace==3.18.0
We're running a ton of other packages that I don't want to share if I don't need to. Those seem the most relevant.
Operating System
No response