每日学习笔记(21)

1，今天收到报警信息，说应用所在机器的硬盘空间不足了，上去一看，居然发现国庆这几天的日志信息累计达到了260多G，可看了下应用下的日志，实际只有几十M而已，进一步check后发现是调用的第三方应用在另一个日志路径下打出大量的Debug信息，回查代码后才明白是Logback和Log4J的冲突问题，于是写了一个类在应用启动时将Log4J的级别调高至ERROR级别，代码如下：

public class Log4jInit {
	private static String logFilePath;
	private final static String DEFAULT_LOG4J_FILE_NAME = "log4j.xml";
	private org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(getClass());

	private void configureLog4j() throws javax.xml.parsers.FactoryConfigurationError {
		
		System.setProperty( "org.apache.commons.logging.Log", "org.apache.commons.logging.impl.NoOpLog" );
		Properties p = new Properties();
		p.put("log4j.logger.httpclient.wire", Level.ERROR);
		p.put("log4j.logger.org.apache.commons.httpclient", Level.ERROR);
		
		Logger root = Logger.getRootLogger();
        boolean rootIsConfigured = root.getAllAppenders().
        hasMoreElements();
        if(root != null) {
            root.setLevel(Level.ERROR);
        }
        
		log.error("turn off log4j");
	}

	public static String getLogFilePath() {
		return logFilePath;
	}

	public static void setLogFilePath(String logFilePath) {
		Log4jInit.logFilePath = logFilePath;
	}
}