System.out和System.err都被打印到catalina.out。catalina.out不会rotate。一般在部署Tomcat后，运行久了，catalina.out文件会越来越大，对系统的稳定造成了一定的影响。
1、可通过修改conf/logging.properties日志配置文件来屏蔽掉这部分的日志信息。
[root@localhost conf]# pwd
/usr/local/tomcat/conf
[root@localhost conf]# cp logging.properties logging.propertiesbak
[root@localhost conf]# vim logging.properties
25 1catalina.org.apache.juli.FileHandler.level = FINE
26 1catalina.org.apache.juli.FileHandler.directory = ${catalina.base}/logs
27 1catalina.org.apache.juli.FileHandler.prefix = catalina.
将level级别设置成WARNING就可以大量减少日志的输出，当然也可以设置成OFF，直接禁用掉。
一般日志的级别有：
SEVERE (highest value) > WARNING > INFO > CONFIG > FINE > FINER > FINEST (lowest value)
2、使用cronolog工具切分Tomcat的catalina.out日志文件
下载、安装cronolog
[root@localhost src]# rpm -qa |grep cronolog [root@localhost src]# tar zxvf cronolog-1.6.2.tar.gz [root@localhost src]# cd cronolog-1.6.2 [root@localhost cronolog-1.6.2]# ./configure [root@localhost cronolog-1.6.2]# make && make install [root@localhost cronolog-1.6.2]# which cronolog /usr/local/sbin/cronolog [root@localhost cronolog-1.6.2]#
用which cronolog可以查到安装的路径，这个路径待会在修改catalina.sh时会用到。
修改catalina.sh 将183行修改成184行内容，注释掉355行，368、369行替换成370、371行，379、380行替换成381、382行；
[root@localhost cronolog-1.6.2]# cp /usr/local/tomcat/bin/catalina.sh /usr/local/tomcat/bin/catalina.shbak [root@localhost cronolog-1.6.2]# vim /usr/local/tomcat/bin/catalina.sh 182 if [ -z "$CATALINA_OUT" ] ; then 183 # CATALINA_OUT="$CATALINA_BASE"/logs/catalina.out 184 CATALINA_OUT="$CATALINA_BASE"/logs/catalina.%Y-%m-%d.out 185 fi ...... 355 # touch "$CATALINA_OUT" ...... 363 -Djava.security.manager 364 -Djava.security.policy=="$CATALINA_BASE"/conf/catalina.policy 365 -Dcatalina.base="$CATALINA_BASE" 366 -Dcatalina.home="$CATALINA_HOME" 367 -Djava.io.tmpdir="$CATALINA_TMPDIR" 368 # org.apache.catalina.startup.Bootstrap "$@" start 369 # >> "$CATALINA_OUT" 2>&1 & 370 org.apache.catalina.startup.Bootstrap "$@" start 2>&1 371 | /usr/local/sbin/cronolog "$CATALINA_OUT" >> /dev/null & 372 373 else 374 "$_RUNJAVA" "$LOGGING_CONFIG" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS 375 -Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" 376 -Dcatalina.base="$CATALINA_BASE" 377 -Dcatalina.home="$CATALINA_HOME" 378 -Djava.io.tmpdir="$CATALINA_TMPDIR" 379 # org.apache.catalina.startup.Bootstrap "$@" start 380 # >> "$CATALINA_OUT" 2>&1 & 381 org.apache.catalina.startup.Bootstrap "$@" start 2>&1 382 | /usr/local/sbin/cronolog "$CATALINA_OUT" >> /dev/null & 383 384 fi [root@localhost bin]# ./catalina.sh start Using CATALINA_BASE: /app/apache-tomcat-7.0.61 Using CATALINA_HOME: /app/apache-tomcat-7.0.61 Using CATALINA_TMPDIR: /app/apache-tomcat-7.0.61/temp Using JRE_HOME: /app/jdk1.7.0_79 Using CLASSPATH: /app/apache-tomcat-7.0.61/bin/bootstrap.jar:/app/apache-tomcat-7.0.61/bin/tomcat-juli.jar Tomcat started. [root@localhost bin]# service tomcat stop [root@localhost bin]# service tomcat start
