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Identifying forged messages: From Carbon 4.4.3 onwards, it is possible to use a UUID in the log messages so that any forged messages can be easily identified. The UUID is logged using a new conversion character ‘K’ in the log pattern layout. By default, the UUID will be generated every time the server starts. However, you can configure your server to generate the UUID more or less frequently, by specifying an exact time interval in the log4j.properties file. See the section on configuring log4j properties for more information on log patterns.
See the following topics related to log management in WSO2 Carbon products;
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- Through the log files that are stored in the
<PRODUCT_HOME>/repository/logsfolder. This folder contains current logs in a log file with a date stamp. Older logs are archived in thewso2carbon.logfile. - Through the command prompt/shell terminal that opens when you run the "
wso2server.bat"/"wso2server.sh" files to start the Carbon server. - Through the advanced monitoring capabilities in WSO2 BAM. Through the management console of your productthe management console of your product.
Limiting the size of the wso2carbon.log file
You can limit the size of the <PRODUCT_HOME>/repository/logs/wso2carbon.log file by following the steps given below. This is useful if you want to archive the logs and get backups periodically.
- Add
org.apache.log4j.RollingFileAppenderas the value of thelog4j.appender.CARBON_LOGFILEproperty in the<PRODUCT_HOME>/repository/conf/log4j.propertiesfile as follows.log4j.appender.CARBON_LOGFILE=org.apache.log4j.RollingFileAppender Add the following two properties under
RollingFileAppender.log4j.appender.CARBON_LOGFILE.MaxFileSize=10MBlog4j.appender.CARBON_LOGFILE.MaxBackupIndex=20Info If the size of the log file is exceeding the value defined in the
MaxFileSizeproperty, then the content is copied to a backup file and the logs are continued to be added to a new empty log file. TheMaxBackupIndexproperty makes the Log4j keep a given maximum number of backup files for the logs.