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：
1 #可配置项(5类日志)：catalina、localhost、manager、admin、host-manager 2 handlers = 1catalina.org.apache.juli.FileHandler, 2localhost.org.apache.juli.FileHandler, 3 3manager.org.apache.juli.FileHandler, 4host-manager.org.apache.juli.FileHandler, java.util.logging.ConsoleHandler 4 5 #日志输出为输出到文件和输出到控制台 6 .handlers = 1catalina.org.apache.juli.FileHandler, java.util.logging.ConsoleHandler 7 8 #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) 9 #配置文件使catalina日志输出级别为FINE 10 1catalina.org.apache.juli.FileHandler.level = FINE 11 #catalina文件输出位置 12 1catalina.org.apache.juli.FileHandler.directory = ${catalina.base}/logs 13 #catalina日志前缀为catalina 14 1catalina.org.apache.juli.FileHandler.prefix = catalina. 15 16 #配置文件使localhost日志输出级别为FINE 17 2localhost.org.apache.juli.FileHandler.level = FINE 18 #localhost文件输出位置 19 2localhost.org.apache.juli.FileHandler.directory = ${catalina.base}/logs 20 #localhost日志前缀为localhost 21 2localhost.org.apache.juli.FileHandler.prefix = localhost. 22 23 #配置文件使manager日志输出级别为FINE 24 3manager.org.apache.juli.FileHandler.level = FINE 25 #manager文件输出位置 26 3manager.org.apache.juli.FileHandler.directory = ${catalina.base}/logs 27 #manager日志前缀为manager 28 3manager.org.apache.juli.FileHandler.prefix = manager. 29 30 #配置文件使host-manager日志输出级别为FINE 31 4host-manager.org.apache.juli.FileHandler.level = FINE 32 #host-manager文件输出位置 33 4host-manager.org.apache.juli.FileHandler.directory = ${catalina.base}/logs 34 #host-manager日志前缀为host-manager 35 4host-manager.org.apache.juli.FileHandler.prefix = host-manager. 36 37 #配置文件使控制台日志输出级别为FINE 38 java.util.logging.ConsoleHandler.level = FINE 39 #控制台日志输出格式 40 java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter 41 42 #localhost日志文件输出级别为INFO 43 org.apache.catalina.core.ContainerBase.[Catalina].[localhost].level = INFO 44 #localhost日志文件输出处理类2localhost.org.apache.juli.FileHandler 45 org.apache.catalina.core.ContainerBase.[Catalina].[localhost].handlers = 2localhost.org.apache.juli.FileHandler 46 47 #manager日志文件输出级别为INFO 48 org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/manager].level = INFO 49 #manager日志文件输出处理类3manager.org.apache.juli.FileHandler 50 org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/manager].handlers = 3manager.org.apache.juli.FileHandler 51 52 #host-manager日志文件输出级别为INFO 53 org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/host-manager].level = INFO 54 #host-manager日志文件输出处理类4host-manager.org.apache.juli.FileHandler 55 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 19-Sep-2018 09:53:28.358 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server version: Apache Tomcat/8.0.53 19-Sep-2018 09:53:28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server built: Jun 29 2018 14:42:45 UTC 19-Sep-2018 09:53:28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server number: 8.0.53.0 19-Sep-2018 09:53:28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Name: Linux 19-Sep-2018 09:53:28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Version: 3.10.0-862.el7.x86_64 19-Sep-2018 09:53:28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Architecture: amd64 19-Sep-2018 09:53:28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Java Home: /usr/java/jdk1.8.0_131/jre 19-Sep-2018 09:53:28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Version: 1.8.0_131-b11 19-Sep-2018 09:53:28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Vendor: Oracle Corporation 19-Sep-2018 09:53:28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_BASE: /opt/tomcat 19-Sep-2018 09:53:28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_HOME: /opt/tomcat 19-Sep-2018 09:53:28.361 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.config.file=/opt/tomcat/conf/logging.properties 19-Sep-2018 09:53:28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager 19-Sep-2018 09:53:28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djdk.tls.ephemeralDHKeySize=2048 19-Sep-2018 09:53:28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.protocol.handler.pkgs=org.apache.catalina.webresources 19-Sep-2018 09:53:28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dignore.endorsed.dirs= 19-Sep-2018 09:53:28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.base=/opt/tomcat 19-Sep-2018 09:53:28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.home=/opt/tomcat 19-Sep-2018 09:53:28.362 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.io.tmpdir=/opt/tomcat/temp 19-Sep-2018 09:53:28.362 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 19-Sep-2018 09:53:28.676 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["http-nio-8080"] 19-Sep-2018 09:53:28.716 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read 19-Sep-2018 09:53:28.731 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["ajp-nio-8009"] 19-Sep-2018 09:53:28.732 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read 19-Sep-2018 09:53:28.746 INFO [main] org.apache.catalina.startup.Catalina.load Initialization processed in 1083 ms 19-Sep-2018 09:53:28.794 INFO [main] org.apache.catalina.core.StandardService.startInternal Starting service Catalina 19-Sep-2018 09:53:28.794 INFO [main] org.apache.catalina.core.StandardEngine.startInternal Starting Servlet Engine: Apache Tomcat/8.0.53 19-Sep-2018 09:53:28.829 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /opt/tomcat/webapps/ROOT 19-Sep-2018 09:53:29.524 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /opt/tomcat/webapps/ROOT has finished in 694 ms 19-Sep-2018 09:53:29.524 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /opt/tomcat/webapps/docs 19-Sep-2018 09:53:29.552 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /opt/tomcat/webapps/docs has finished in 28 ms 19-Sep-2018 09:53:29.552 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /opt/tomcat/webapps/examples 19-Sep-2018 09:53:29.987 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /opt/tomcat/webapps/examples has finished in 434 ms 19-Sep-2018 09:53:29.987 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /opt/tomcat/webapps/host-manager 19-Sep-2018 09:53:30.033 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /opt/tomcat/webapps/host-manager has finished in 46 ms 19-Sep-2018 09:53:30.034 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /opt/tomcat/webapps/manager 19-Sep-2018 09:53:30.064 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /opt/tomcat/webapps/manager has finished in 29 ms 19-Sep-2018 09:53:30.082 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["http-nio-8080"] 19-Sep-2018 09:53:30.099 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["ajp-nio-8009"] 19-Sep-2018 09:53:30.106 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in 1360 ms 2018-09-19 16:52:10 [] [] [INFO]-[Thread: DefaultQuartzScheduler_Worker-7] 开始检查系统