What is the use of ade log in cisco ise?

In Cisco ISE (Identity Services Engine), the ADE.log file has a  critical role in system-level troubleshooting and diagnostics.

The ADE.log is the Application Development Environment log, and it logs core system-level events related to the underlying ADE-OS (the base operating system of Cisco ISE, which is a hardened Linux environment). This log is especially useful when diagnosing:

• System startup or shutdown issues

• Application services starting/stopping

• Resource errors (disk, memory, etc.)

• OS-level failures or anomalies

• Patch or upgrade errors