How to set maximum number of rolls and maximum log size for tomcat?

Question

I have problem with space so need limit size of catalina.out to 10M and limit number of rolls to 3 previous days. Is it possible with only configure logging.properties? Thanks.

Answer 1

As Tomcat internally uses JUL to log , you can use the system property java.util.logging.config.file to specify the file path of the properties file. For the format of this properties file , you can refer to your JRE_HOME/lib/logging.properties (which is the default configuration file used by JUL)

However, JUL does not support the daily rotation . If you don't mind , you can use its java.util.logging.FileHandler to rotate the log files based on the log 's file size instead:

# Define the FileHandler  handlers= java.util.logging.FileHandler  # Configure the FileHandler java.util.logging.FileHandler.pattern = %h/java%u.log java.util.logging.FileHandler.limit = 1024000 java.util.logging.FileHandler.count = 3 java.util.logging.FileHandler.formatter =  java.util.logging.SimpleFormatter java.util.logging.FileHandler.append=true 

Then , each log file will has the limit size 1024000 bytes (1MB) , and maximum roll to 3 output log files . You can refer the Javadoc of java.util.logging.FileHandler for the details about the configuration.

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You have to implemnt the File Handler if you want to support rotation on daily basis using JUL . I found a custom implemenation from this blog . I did not try it yet. You can refer it if you have any interest.