Server-side logging is controlled by properties set in $SONARQUBE_HOME/conf/sonar.properties.
4 logs files are created : one per SonarQube process.
The server-side log level can be customized via the sonar.log.level property. Supported values are:
DEBUG - for advanced logs.
TRACE - show advanced logs and all SQL and Elasticsearch requests. TRACE level logging slows down the server environment, and should be used only for tracking web request performance problems.
Log Level by Process
The server-side log level can be adjusted more precisely for the 4 processes of SonarQube Server via the following property:
sonar.log.level.app: for the Main process of SonarQube (aka WrapperSimpleApp, the bootstrapper process starting the 3 others)
sonar.log.level.web: for the WebServer
sonar.log.level.ce: for the ComputeEngineServer
sonar.log.level.es: for the SearchServer
To control log rolling, use the sonar.log.rollingPolicy
time:[value] - for time-based rotation. For example, use time:yyyy-MM-dd for daily rotation, and time:yyyy-MM for monthly rotation.
size:[value] - for size-based rotation. For example, size:10MB.
none - for no rotation. Typically this would be used when logs are handled by an external system like logrotate.
sonar.log.maxFiles is the maximum number of files to keep. This property is ignored if sonar.log.rollingPolicy=none.