Specify a set of logger names and the corresponding log levels that
    this log recorder will collect. For example, if you specify
    hudson.model.Hudson and info, any logs recorded
    for hudson.model.Hudson or its descendants with the log level
    info or above will show up in this log recorder.
    
    If you have multiple entries, a log entry that matches any of them
    will be collected.
    
    Also see 
    this document for more about logging in Java and Jenkins.