1 tomcat  日志详解

1.1  tomcat 日志配置文件

　　tomcat 对应日志的配置文件：tomcat目录下的/conf/logging.properties。

　　tomcat 的日志等级有：日志输出级别：SEVERE (最高级别) > WARNING > INFO > CONFIG > FINE > FINER(精心) > FINEST (所有内容,最低级别)

　　tomcat  有五类日志 ：catalina、localhost、manager、admin、host-manager

　　/conf/logging.properties 配置文件：

 #可配置项(5类日志)：catalina、localhost、manager、admin、host-manager

 handlers = 1catalina.org.apache.juli.FileHandler, 2localhost.org.apache.juli.FileHandler,

 3manager.org.apache.juli.FileHandler, 4host-manager.org.apache.juli.FileHandler, java.util.logging.ConsoleHandler

 #日志输出为输出到文件和输出到控制台

 .handlers = 1catalina.org.apache.juli.FileHandler, java.util.logging.ConsoleHandler

 #日志输出级别：SEVERE (最高级别) > WARNING > INFO > CONFIG > FINE > FINER(精心) > FINEST (所有内容,最低级别)

 #配置文件使catalina日志输出级别为FINE

 1catalina.org.apache.juli.FileHandler.level = FINE

 #catalina文件输出位置

 1catalina.org.apache.juli.FileHandler.directory = ${catalina.base}/logs

 #catalina日志前缀为catalina

 1catalina.org.apache.juli.FileHandler.prefix = catalina.

 #配置文件使localhost日志输出级别为FINE

 2localhost.org.apache.juli.FileHandler.level = FINE

 #localhost文件输出位置

 2localhost.org.apache.juli.FileHandler.directory = ${catalina.base}/logs

 #localhost日志前缀为localhost

 2localhost.org.apache.juli.FileHandler.prefix = localhost.

 #配置文件使manager日志输出级别为FINE

 3manager.org.apache.juli.FileHandler.level = FINE

 #manager文件输出位置

 3manager.org.apache.juli.FileHandler.directory = ${catalina.base}/logs

 #manager日志前缀为manager

 3manager.org.apache.juli.FileHandler.prefix = manager.

 #配置文件使host-manager日志输出级别为FINE

 4host-manager.org.apache.juli.FileHandler.level = FINE

 #host-manager文件输出位置

 4host-manager.org.apache.juli.FileHandler.directory = ${catalina.base}/logs

 #host-manager日志前缀为host-manager

 4host-manager.org.apache.juli.FileHandler.prefix = host-manager.

 #配置文件使控制台日志输出级别为FINE

 java.util.logging.ConsoleHandler.level = FINE

 #控制台日志输出格式

 java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter

 #localhost日志文件输出级别为INFO

 org.apache.catalina.core.ContainerBase.[Catalina].[localhost].level = INFO

 #localhost日志文件输出处理类2localhost.org.apache.juli.FileHandler

 org.apache.catalina.core.ContainerBase.[Catalina].[localhost].handlers = 2localhost.org.apache.juli.FileHandler

 #manager日志文件输出级别为INFO

 org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/manager].level = INFO

 #manager日志文件输出处理类3manager.org.apache.juli.FileHandler

 org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/manager].handlers = 3manager.org.apache.juli.FileHandler

 #host-manager日志文件输出级别为INFO

 org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/host-manager].level = INFO

 #host-manager日志文件输出处理类4host-manager.org.apache.juli.FileHandler

 org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/host-manager].handlers = 4host-manager.org.apache.juli.FileHandler

1.2  tomcat 日志文件详解

　tomcat  有五类日志 ：catalina、localhost、manager、admin、host-manager

　1.2.1 catalina.out ：

catalina.out即标准输出和标准出错，所有输出到这两个位置的都会进入catalina.out，这里包含tomcat运行自己输出的日志以及应用里向console输出的日志。默认这个日志文件是不会进行自动切割的，我们需要借助其他工具进行切割（注意：catalina.out文件如果过大会影响）

#截取部分日志

-Sep- ::28.358 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server version:        Apache Tomcat/8.0.

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server built:          Jun   :: UTC

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server number:         8.0.53.0

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Name:               Linux

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Version:            3.10.-.el7.x86_64

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Architecture:          amd64

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Java Home:             /usr/java/jdk1..0_131/jre

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Version:           1.8.0_131-b11

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Vendor:            Oracle Corporation

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_BASE:         /opt/tomcat

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_HOME:         /opt/tomcat

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.config.file=/opt/tomcat/conf/logging.properties

-Sep- ::28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager

-Sep- ::28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djdk.tls.ephemeralDHKeySize=

-Sep- ::28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.protocol.handler.pkgs=org.apache.catalina.webresources

-Sep- ::28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dignore.endorsed.dirs=

-Sep- ::28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.base=/opt/tomcat

-Sep- ::28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.home=/opt/tomcat

-Sep- ::28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.io.tmpdir=/opt/tomcat/temp

-Sep- ::28.362 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib

-Sep- ::28.676 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["http-nio-8080"]

-Sep- ::28.716 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read

-Sep- ::28.731 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["ajp-nio-8009"]

-Sep- ::28.732 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read

-Sep- ::28.746 INFO [main] org.apache.catalina.startup.Catalina.load Initialization processed in  ms

-Sep- ::28.794 INFO [main] org.apache.catalina.core.StandardService.startInternal Starting service Catalina

-Sep- ::28.794 INFO [main] org.apache.catalina.core.StandardEngine.startInternal Starting Servlet Engine: Apache Tomcat/8.0.

-Sep- ::28.829 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /opt/tomcat/webapps/ROOT

-Sep- ::29.524 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /opt/tomcat/webapps/ROOT has finished in  ms

-Sep- ::29.524 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /opt/tomcat/webapps/docs

-Sep- ::29.552 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /opt/tomcat/webapps/docs has finished in  ms

-Sep- ::29.552 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /opt/tomcat/webapps/examples

-Sep- ::29.987 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /opt/tomcat/webapps/examples has finished in  ms

-Sep- ::29.987 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /opt/tomcat/webapps/host-manager

-Sep- ::30.033 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /opt/tomcat/webapps/host-manager has finished in  ms

-Sep- ::30.034 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /opt/tomcat/webapps/manager

-Sep- ::30.064 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /opt/tomcat/webapps/manager has finished in  ms

-Sep- ::30.082 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["http-nio-8080"]

-Sep- ::30.099 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["ajp-nio-8009"]

-Sep- ::30.106 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in  ms

-- ::

 [] [] [INFO]-[Thread: DefaultQuartzScheduler_Worker-] 开始检查系统

1.2.2 catalina.YYYY-MM-DD.log

　catalina.{yyyy-MM-dd}.log是tomcat自己运行的一些日志，这些日志还会输出到catalina.out，但是应用向console输出的日志不会输出到catalina.{yyyy-MM-dd}.log,它是tomcat的启动和暂停时的运行日志，注意，它和catalina.out是里面的内容是不一样的。

-Sep- ::18.713 INFO [main] org.apache.coyote.AbstractProtocol.pause Pausing ProtocolHandler ["http-nio-8080"]

-Sep- ::18.713 INFO [main] org.apache.coyote.AbstractProtocol.pause Pausing ProtocolHandler ["ajp-nio-8009"]

-Sep- ::18.713 INFO [main] org.apache.catalina.core.StandardService.stopInternal Stopping service Catalina

-Sep- ::18.741 INFO [] org.apache.coyote.AbstractProtocol.stop Stopping ProtocolHandler ["http-nio-8080"]

-Sep- ::18.741 INFO [] org.apache.coyote.AbstractProtocol.destroy Destroying ProtocolHandler ["http-nio-8080"]

-Sep- ::18.741 INFO [] org.apache.coyote.AbstractProtocol.stop Stopping ProtocolHandler ["ajp-nio-8009"]

-Sep- ::18.741 INFO [] org.apache.coyote.AbstractProtocol.destroy Destroying ProtocolHandler ["ajp-nio-8009"]

-Sep- ::13.515 INFO [main] org.apache.catalina.core.StandardServer.await A valid shutdown command was received via the shutdown port. Stopping the Server instance.

-Sep- ::13.518 INFO [main] org.apache.coyote.AbstractProtocol.pause Pausing ProtocolHandler ["http-nio-8080"]

-Sep- ::13.589 INFO [main] org.apache.coyote.AbstractProtocol.pause Pausing ProtocolHandler ["ajp-nio-8009"]

-Sep- ::13.643 INFO [main] org.apache.catalina.core.StandardService.stopInternal Stopping service Catalina

-Sep- ::13.743 INFO [main] org.apache.coyote.AbstractProtocol.stop Stopping ProtocolHandler ["http-nio-8080"]

-Sep- ::13.749 INFO [main] org.apache.coyote.AbstractProtocol.stop Stopping ProtocolHandler ["ajp-nio-8009"]

-Sep- ::13.757 INFO [main] org.apache.coyote.AbstractProtocol.destroy Destroying ProtocolHandler ["http-nio-8080"]

-Sep- ::13.760 INFO [main] org.apache.coyote.AbstractProtocol.destroy Destroying ProtocolHandler ["ajp-nio-8009"]

-Sep- ::28.358 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server version:        Apache Tomcat/8.0.

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server built:          Jun   :: UTC

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server number:         8.0.53.0

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Name:               Linux

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Version:            3.10.-.el7.x86_64

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Architecture:          amd64

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Java Home:             /usr/java/jdk1..0_131/jre

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Version:           1.8.0_131-b11

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Vendor:            Oracle Corporation

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_BASE:         /opt/tomcat

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_HOME:         /opt/tomcat

-Sep- ::28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.config.file=/opt/tomcat/conf/logging.properties

-Sep- ::28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager

-Sep- ::28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djdk.tls.ephemeralDHKeySize=

-Sep- ::28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.protocol.handler.pkgs=org.apache.catalina.webresources

-Sep- ::28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dignore.endorsed.dirs=

-Sep- ::28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.base=/opt/tomcat

-Sep- ::28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.home=/opt/tomcat

-Sep- ::28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.io.tmpdir=/opt/tomcat/temp

-Sep- ::28.362 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib

-Sep- ::28.676 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["http-nio-8080"]

-Sep- ::28.716 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read

-Sep- ::28.731 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["ajp-nio-8009"]

-Sep- ::28.732 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read

-Sep- ::28.746 INFO [main] org.apache.catalina.startup.Catalina.load Initialization processed in  ms

-Sep- ::28.794 INFO [main] org.apache.catalina.core.StandardService.startInternal Starting service Catalina

-Sep- ::28.794 INFO [main] org.apache.catalina.core.StandardEngine.startInternal Starting Servlet Engine: Apache Tomcat/8.0.

-Sep- ::28.829 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /opt/tomcat/webapps/ROOT

-Sep- ::29.524 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /opt/tomcat/webapps/ROOT has finished in  ms

-Sep- ::29.524 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /opt/tomcat/webapps/docs

-Sep- ::29.552 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /opt/tomcat/webapps/docs has finished in  ms

-Sep- ::29.552 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /opt/tomcat/webapps/examples

-Sep- ::29.987 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /opt/tomcat/webapps/examples has finished in  ms

-Sep- ::29.987 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /opt/tomcat/webapps/host-manager

-Sep- ::30.033 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /opt/tomcat/webapps/host-manager has finished in  ms

-Sep- ::30.034 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /opt/tomcat/webapps/manager

-Sep- ::30.064 INFO [localhost-startStop-] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /opt/tomcat/webapps/manager has finished in  ms

-Sep- ::30.082 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["http-nio-8080"]

-Sep- ::30.099 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["ajp-nio-8009"]

-Sep- ::30.106 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in  ms

　1.2.3 localhost.YYYY-MM-DD.log

　localhost.{yyyy-MM-dd}.log主要是应用初始化(listener, filter, servlet)未处理的异常最后被tomcat捕获而输出的日志,它也是包含tomcat的启动和暂停时的运行日志,但它没有catalina.2018-09-19.log 日志全。它只是记录了部分日志。

-Sep- ::15.287 INFO [localhost-startStop-] org.apache.catalina.core.ApplicationContext.log ContextListener: contextInitialized()

-Sep- ::15.287 INFO [localhost-startStop-] org.apache.catalina.core.ApplicationContext.log SessionListener: contextInitialized()

-Sep- ::15.288 INFO [localhost-startStop-] org.apache.catalina.core.ApplicationContext.log ContextListener: attributeAdded('StockTicker', 'async.Stockticker@2f62fc5f')

-Sep- ::18.568 INFO [localhost-startStop-] org.apache.catalina.core.ApplicationContext.log ContextListener: contextInitialized()

-Sep- ::18.568 INFO [localhost-startStop-] org.apache.catalina.core.ApplicationContext.log SessionListener: contextInitialized()

-Sep- ::18.569 INFO [localhost-startStop-] org.apache.catalina.core.ApplicationContext.log ContextListener: attributeAdded('StockTicker', 'async.Stockticker@22890441')

-Sep- ::18.732 INFO [localhost-startStop-] org.apache.catalina.core.ApplicationContext.log SessionListener: contextDestroyed()

-Sep- ::18.732 INFO [localhost-startStop-] org.apache.catalina.core.ApplicationContext.log ContextListener: contextDestroyed()

-Sep- ::13.707 INFO [localhost-startStop-] org.apache.catalina.core.ApplicationContext.log SessionListener: contextDestroyed()

-Sep- ::13.707 INFO [localhost-startStop-] org.apache.catalina.core.ApplicationContext.log ContextListener: contextDestroyed()

-Sep- ::29.980 INFO [localhost-startStop-] org.apache.catalina.core.ApplicationContext.log ContextListener: contextInitialized()

-Sep- ::29.981 INFO [localhost-startStop-] org.apache.catalina.core.ApplicationContext.log SessionListener: contextInitialized()

-Sep- ::29.982 INFO [localhost-startStop-] org.apache.catalina.core.ApplicationContext.log ContextListener: attributeAdded('StockTicker', 'async.Stockticker@46012cd1')

　1.2.4 localhost_access_log.YYYY-MM-DD.txt

　localhost_access_log.2018-09-19.txt：这个是访问tomcat的日志，请求时间和资源，状态码都有记录。

192.168.1.220 - - [/Sep/::: -] "GET / HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /tomcat.css HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /tomcat.png HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /bg-button.png HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /bg-nav.png HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /asf-logo-wide.svg HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /bg-middle.png HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /bg-upper.png HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET / HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /favicon.ico HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET / HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /favicon.ico HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET / HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /favicon.ico HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /docs/setup.html HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /docs/images/docs-stylesheet.css HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /docs/images/tomcat.png HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /docs/images/asf-logo.svg HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /docs/images/fonts/fonts.css HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /docs/images/fonts/OpenSans400.woff HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /docs/images/fonts/OpenSans700.woff HTTP/1.1"

192.168.1.220 - - [/Sep/::: -] "GET /docs/images/fonts/OpenSans600.woff HTTP/1.1"

　1.2.5 host-manager.YYYY-MM-DD.log

host-manager.2018-09-19.log：这个估计是放tomcat的自带的manager项目的日志信息的，未看到有什么重要的日志信息。

　 1.2.6 manager.YYYY-MM-DD.log

　  manager.2018-09-19.log  ：　这个是tomcat manager项目专有的日志文件.

1.3 tomcat  日志文件切割

　　tomcat  的  catalina.out  文件tomcat 是不会进行日志切割的，当这个文件大于2G  时，会影响tomcat的运行。那么我们需要对这个文件进行日志切割，切割的方法有很多种：

　　第一种：

　　通过系统自带的切割工具：logrotate来进行切割。

　　第二种:

　　使用logj4进行切割日志。

　　第三种：

　　使用用cronolog分割tomcat的catalina.out文件

　　以上三种方法见：https://www.cnblogs.com/happy-king/p/9193401.html

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