Suman,
Actually after the patch upgrade, the app-ca.log and bg-ca.log is not updating. But the application is up and running and scheduled jobs are also working fine.
App-system and bg-system logs are updating as usual.
While going through logger.xml it is seen that there is change in the snippet.
<category additivity="false" name="com.niku">
<priority value="warn"/>
<appender-ref ref="DWH"/>
</category>
Hence we changed it back to "STDOUT" and restarted the services.
Thanks,
Agin