tomcat7配置log4j解决catalina.out日志过大问题

分手后的思念是犯贱 2021-06-24 14:35 538阅读 0赞

tomcat默认安装后，会每天会自动切割日志文件，(catalina.2010-10-08.log、catalina.2010-10-09.log、catalina.2010-10-10.log)这样的形式，但是他的catalina.out不清空，任其自由增长，时间长了系统性能急剧下降。

要解决catalina.out过大问题，网上有很多种方法，如：使用日志切割工具、或者自己写定时脚本：

#!/bin/bash
    
    cd `dirname $0`
    d=`date +%Y%m%d`
    d7=`date -d'7 day ago' +%Y%m%d`
    
    cd ../logs/
    
    cp catalina.out catalina.out.${d}
    cat /dev/null > catalina.out
    rm -rf catalina.out.${d7}

对其日志进行切割每天生成一个文件，并且删除7天前的文件。

其次，还可以对tomcat进行log4j配置，使用log4j的日志“切割”方式。配置如下：

1）下载与tomcat对应版本的tomcat-juli.jar 和 tomcat-juli-adapters.jar，或者tomcat-extras-juli-7.0.70.jar和tomcat-extras-juli-adapters-7.0.70.jar：

https://mvnrepository.com/artifact/org.apache.tomcat.extras
    https://mvnrepository.com/artifact/org.apache.tomcat

2）将log4j.jar 和 tomcat-juli-adapters.jar放到$CATALINA\_HOME/lib目录下；

3）将log4j.properties 放到$CATALINA\_HOME/lib目录下；

4）用新下载的tomcat-juli.jar替换掉$CATALINA\_HOME/bin/中的tomcat-juli.jar；（下载的tomcat-juli.jar包含了所有Commons Logging实现，能够发现log4j和配置）

5）删除$CATALINA\_BASE/conf/logging.properties

6）修改 Tomcat 的 conf/context.xml 文件，将<Context>改为<Context swallowOutput="true">

7）重启tomcat

log4j.rootLogger = INFO, CATALINA
    
    # Define all the appenders
    log4j.appender.CATALINA = org.apache.log4j.DailyRollingFileAppender
    log4j.appender.CATALINA.File = ${catalina.base}/logs/catalina
    log4j.appender.CATALINA.Append = true
    log4j.appender.CATALINA.Encoding = UTF-8
    # Roll-over the log once per day
    log4j.appender.CATALINA.DatePattern = '.'yyyy-MM-dd'.log'
    log4j.appender.CATALINA.layout = org.apache.log4j.PatternLayout
    log4j.appender.CATALINA.layout.ConversionPattern = %d [%t] %-5p %c- %m%n
    
    log4j.appender.LOCALHOST = org.apache.log4j.DailyRollingFileAppender
    log4j.appender.LOCALHOST.File = ${catalina.base}/logs/localhost
    log4j.appender.LOCALHOST.Append = true
    log4j.appender.LOCALHOST.Encoding = UTF-8
    log4j.appender.LOCALHOST.DatePattern = '.'yyyy-MM-dd'.log'
    log4j.appender.LOCALHOST.layout = org.apache.log4j.PatternLayout
    log4j.appender.LOCALHOST.layout.ConversionPattern = %d [%t] %-5p %c- %m%n
    
    log4j.appender.MANAGER = org.apache.log4j.DailyRollingFileAppender
    log4j.appender.MANAGER.File = ${catalina.base}/logs/manager
    log4j.appender.MANAGER.Append = true
    log4j.appender.MANAGER.Encoding = UTF-8
    log4j.appender.MANAGER.DatePattern = '.'yyyy-MM-dd'.log'
    log4j.appender.MANAGER.layout = org.apache.log4j.PatternLayout
    log4j.appender.MANAGER.layout.ConversionPattern = %d [%t] %-5p %c- %m%n
    
    log4j.appender.HOST-MANAGER = org.apache.log4j.DailyRollingFileAppender
    log4j.appender.HOST-MANAGER.File = ${catalina.base}/logs/host-manager
    log4j.appender.HOST-MANAGER.Append = true
    log4j.appender.HOST-MANAGER.Encoding = UTF-8
    log4j.appender.HOST-MANAGER.DatePattern = '.'yyyy-MM-dd'.log'
    log4j.appender.HOST-MANAGER.layout = org.apache.log4j.PatternLayout
    log4j.appender.HOST-MANAGER.layout.ConversionPattern = %d [%t] %-5p %c- %m%n
    
    log4j.appender.CONSOLE = org.apache.log4j.ConsoleAppender
    log4j.appender.CONSOLE.Encoding = UTF-8
    log4j.appender.CONSOLE.layout = org.apache.log4j.PatternLayout
    log4j.appender.CONSOLE.layout.ConversionPattern = %d [%t] %-5p %c- %m%n
    
    # Configure which loggers log to which appenders
    log4j.logger.org.apache.catalina.core.ContainerBase.[Catalina].[localhost] = INFO, LOCALHOST
    log4j.logger.org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/manager] =\
      INFO, MANAGER
    log4j.logger.org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/host-manager] =\
      INFO, HOST-MANAGER

参考： [http://my.oschina.net/xldc/blog/298080][http_my.oschina.net_xldc_blog_298080]

[https://tomcat.apache.org/tomcat-7.0-doc/logging.html\#Using\_Log4j][https_tomcat.apache.org_tomcat-7.0-doc_logging.html_Using_Log4j]

[http_my.oschina.net_xldc_blog_298080]: http://my.oschina.net/xldc/blog/298080
[https_tomcat.apache.org_tomcat-7.0-doc_logging.html_Using_Log4j]: https://tomcat.apache.org/tomcat-7.0-doc/logging.html#Using_Log4j