Issue Summary

The default Java 11 Garbage Collection Logging Settings has the wrong syntax for filecount and filesize.

Steps to Reproduce

1. Install Confluence and pay attention to the files below that has the Java 11 Garbage Collection Logging Settings:
   • setenv.sh

     CATALINA_OPTS="-Xlog:gc+age=debug:file=$LOGBASEABS/logs/gc-`date +%F_%H-%M-%S`.log::filecount=5,filesize=2M ${CATALINA_OPTS}"
     

   • setenv.bat

     set CATALINA_OPTS=-Xlog:gc+age=debug:file="%atlassian_logsdir%\gc-%atlassian_timestamp%.log"::filecount=5,filesize=2M %CATALINA_OPTS%
     

   • service.bat

     -Xlog:gc+age=debug:file=\"%CATALINA_HOME%\logs\gc-%%t.log\"::filecount=5,filesize=2M
     

2. Start Confluence with the respective methods above after modifying the filecount or filesize value(s)

Expected Results

The number of files and maximum size of each file should respect the new value that was modified.

Actual Results

The number of files and maximum size of each file is not respecting the new value that was modified.

Workaround

This is because there's a syntax error in the setting. Removing a colon(:) in the line by modifying them as below will resolve the issue:

1. • setenv.sh

     CATALINA_OPTS="-Xlog:gc+age=debug:file=$LOGBASEABS/logs/gc-`date +%F_%H-%M-%S`.log:filecount=5,filesize=2M ${CATALINA_OPTS}"
     

   • setenv.bat

     set CATALINA_OPTS=-Xlog:gc+age=debug:file="%atlassian_logsdir%\gc-%atlassian_timestamp%.log":filecount=5,filesize=2M %CATALINA_OPTS%
     

   • service.bat

     -Xlog:gc+age=debug:file=\"%CATALINA_HOME%\logs\gc-%%t.log\":filecount=5,filesize=2M
     

     The examples here only focuses on getting the filecount and filesize to work

Information

Please note that if you're modifying this value while using Java 11, please refer to the related issue CONFSERVER-61415 to comment out the Java 8 GC Logging line

Post Confluence 8.0

Confluence 8.0 stopped supporting Java 8, which means the -Xloggc should be removed.

When there is only -Xlog left in the configuration, both Java 11 and Java 17 should pick up the GC Logging setting above, and here's the recommended flag:

1. • setenv.sh

     CATALINA_OPTS="-Xlog:gc*:file=$LOGBASEABS/logs/gc-%t.log:tags,time,uptime,level:filecount=5,filesize=2M ${CATALINA_OPTS}"
     

   • setenv.bat

     set CATALINA_OPTS=-Xlog:gc*:file="%atlassian_logsdir%\gc-%atlassian_timestamp%.log":tags,time,uptime,level:filecount=5,filesize=2M %CATALINA_OPTS%
     

   • In Windows Service:
     verify the installation directory is correct before applying

     -Xlog:gc*:file="C:\Program Files\Atlassian\Confluence\logs\gc-%t.log":tags,time,uptime,level:filecount=5,filesize=2M