When turning on sql trace via the Clarity System Administration (CSA) application (a.k.a. NSA), if the filename on an appender has an unsupported character this can cause the entries in the logger.xml file to be removed.
Steps to Reproduce:
Assumption: Detect 'Log Configuration Changes Automatically' is checked
Expected Result: To get a warning message indicating the filename is invalid
Actual Result: The only category and appender left is the one you created for the sql trace - all other entries are removed
Caused by CLRT-68400
Tested, verified and closed as 'cannot reproduce' on CA Clarity PPM 13.2
Restore the logger.xml file from <install>/.setup/templates/config to the <install>/config directory
In the CSA on the Edit Configuration view click on Reset to restore the values from the logger.xml file