You can try using ausit logs. It records any changes in database. So you might get the extension deletion information there. Below is the link to configure that:
There are no audit logs in 6.X, you'll need to review the Tomcat logs to find this out.
There are plenty of threads on the subject in CSC that cover both audit logs and tomcat logs
HTH
java
HTH
java
if this helps, please rate
Getting Started
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: