Rudder

root@server:/var/log/rudder/webapp# ls -ahl
total 256K
drwxr-xr-x  2 root root 4.0K May  9 06:48 .
drwxr-xr-x 11 root root 4.0K May  9 05:30 ..
-rw-r--r--  1 root root  23K May  9 06:49 2018_05_09.jetty.log
-rw-r--r--  1 root root  53K May  9 06:48 2018_05_09.jetty.log.104825622
-rw-rw----  1 root root  41K May  9 06:11 2018_05_09.stderrout.log
-rw-rw----  1 root root  33K May  9 05:47 2018_05_09.stderrout.log.094721397
-rw-rw----  1 root root  26K May  9 05:48 2018_05_09.stderrout.log.094832523
-rw-rw----  1 root root  24K May  9 05:53 2018_05_09.stderrout.log.095307913
-rw-rw----  1 root root  27K May  9 05:53 2018_05_09.stderrout.log.095519552
-rw-rw----  1 root root  217 May  9 06:48 java.log

it looks like an unwanted change.