Issue Summary

Log4j is not correctly rotating the atlassian-confluence.log file in the Windows environment since Confluence version 7.19.12.

Steps to Reproduce

• On the Windows server install Confluence 7.19.12 and run Confluence as a Windows service.
• Enable debug for com.atlassian class in Confluence Settings -> Logging and Profiling -> Add com.atlassian in Add New Entry -> Class/Package Name and click on Save at the end of the page. This is to fill the log file quickly to reproduce the issue.

Expected Results

• atlassian-confluence.log file should rotate when it reaches MaxFileSize of 20480KB set in log4j.appender.confluencelog.MaxFileSize=20480KB.
  <confluence-install>/confluence/WEB-INF/classes/log4.properties.

Actual Results

• atlassian-confluence.log file will not rotate when it reaches MaxFileSize of 20480KB set in log4j.appender.confluencelog.MaxFileSize=20480KB.
  <confluence-install>/confluence/WEB-INF/classes/log4.properties.
  

Workaround

• Rename the atlassian-confluence.log filename to something else, for example, atlassian-confluence-custom.log in <confluence-install>/confluence/WEB-INF/classes/log4.properties file and restart Confluence. Below screenshot showing the log file rotating after the workaround.
  

OR

• Comment the com.atlassian.analytics.client and burstFilterAppender related lines in log4j.properties file.
  1. Edit <confluence-install>/confluence/WEB-INF/classes/log4j.properties
     • Comment out the com.atlassian.analytics.client and burstFilterAppender related lines (located at the very bottom of the file) by adding a leading # character as such:

       # Appender that burst limits log messages
       #log4j.appender.burstFilterAppender=com.atlassian.confluence.logging.ConfluenceHomeLogAppender
       #log4j.appender.burstFilterAppender.Threshold=ALL
       #log4j.appender.burstFilterAppender.layout=com.atlassian.confluence.util.PatternLayoutWithContext
       #log4j.appender.burstFilterAppender.layout.ConversionPattern=%d %p [%t] [%c{4}] %M %m%n
       #log4j.appender.burstFilterAppender.filter.1=com.atlassian.confluence.impl.logging.filter.BurstFilter
       #log4j.appender.burstFilterAppender.filter.1.Level=WARN
       #log4j.appender.burstFilterAppender.filter.1.Rate=0.5
       #log4j.appender.burstFilterAppender.filter.1.MaxBurst=5
       
       #log4j.logger.com.atlassian.analytics.client.listener.ProductEventListener=WARN, burstFilterAppender
       #log4j.additivity.com.atlassian.analytics.client.listener.ProductEventListener=false
       

1. 1. Restart the Confluence instance for the change to take effect

If you run Confluence in a cluster, make sure you apply the above changes on all of your nodes (one at a time).