clipse启动tomcat报出下面的错误提示:

控制台:

九月 06, 2018 9:01:31 下午 org.apache.tomcat.util.digester.SetPropertiesRule begin

警告: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:servlet' did not find a matching property.

九月 06, 2018 9:01:31 下午 org.apache.catalina.startup.VersionLoggerListener log

信息: Server version:        Apache Tomcat/9.0.10

九月 06, 2018 9:01:31 下午 org.apache.catalina.startup.VersionLoggerListener log

信息: Server built:          Jun 20 2018 17:32:21 UTC

九月 06, 2018 9:01:31 下午 org.apache.catalina.startup.VersionLoggerListener log

信息: Server number:         9.0.10.0

九月 06, 2018 9:01:31 下午 org.apache.catalina.startup.VersionLoggerListener log

信息: OS Name:               Linux

九月 06, 2018 9:01:31 下午 org.apache.catalina.startup.VersionLoggerListener log

信息: OS Version:            4.15.0-33-generic

九月 06, 2018 9:01:31 下午 org.apache.catalina.startup.VersionLoggerListener log

信息: Architecture:          amd64

九月 06, 2018 9:01:31 下午 org.apache.catalina.startup.VersionLoggerListener log

信息: Java Home:             /usr/lib/jvm/java-8-openjdk-amd64/jre

九月 06, 2018 9:01:31 下午 org.apache.catalina.startup.VersionLoggerListener log

信息: JVM Version:           1.8.0_181-8u181-b13-0ubuntu0.16.04.1-b13

九月 06, 2018 9:01:31 下午 org.apache.catalina.startup.VersionLoggerListener log

信息: JVM Vendor:            Oracle Corporation

九月 06, 2018 9:01:31 下午 org.apache.catalina.startup.VersionLoggerListener log

信息: CATALINA_BASE:         /home/dss/eclipse-workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0

九月 06, 2018 9:01:31 下午 org.apache.catalina.startup.VersionLoggerListener log

信息: CATALINA_HOME:         /usr/local/tomcat9

九月 06, 2018 9:01:31 下午 org.apache.catalina.startup.VersionLoggerListener log

信息: Command line argument: -Dcatalina.base=/home/dss/eclipse-workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0

九月 06, 2018 9:01:31 下午 org.apache.catalina.startup.VersionLoggerListener log

信息: Command line argument: -Dcatalina.home=/usr/local/tomcat9

九月 06, 2018 9:01:31 下午 org.apache.catalina.startup.VersionLoggerListener log

信息: Command line argument: -Dwtp.deploy=/home/dss/eclipse-workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps

九月 06, 2018 9:01:31 下午 org.apache.catalina.startup.VersionLoggerListener log

信息: Command line argument: -Djava.endorsed.dirs=/usr/local/tomcat9/endorsed

九月 06, 2018 9:01:31 下午 org.apache.catalina.startup.VersionLoggerListener log

信息: Command line argument: -Dfile.encoding=UTF-8

九月 06, 2018 9:01:31 下午 org.apache.catalina.core.AprLifecycleListener lifecycleEvent

信息: 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/lib/x86_64-linux-gnu/jni:/lib/x86_64-linux-gnu:/usr/lib/x86_64-linux-gnu:/usr/lib/jni:/lib:/usr/lib]

九月 06, 2018 9:01:32 下午 org.apache.coyote.AbstractProtocol init

信息: Initializing ProtocolHandler ["http-nio-8080"]

九月 06, 2018 9:01:32 下午 org.apache.tomcat.util.net.NioSelectorPool getSharedSelector

信息: Using a shared selector for servlet write/read

九月 06, 2018 9:01:32 下午 org.apache.coyote.AbstractProtocol init

信息: Initializing ProtocolHandler ["ajp-nio-8009"]

九月 06, 2018 9:01:32 下午 org.apache.tomcat.util.net.NioSelectorPool getSharedSelector

信息: Using a shared selector for servlet write/read

九月 06, 2018 9:01:32 下午 org.apache.catalina.startup.Catalina load

信息: Initialization processed in 736 ms

九月 06, 2018 9:01:32 下午 org.apache.catalina.core.StandardService startInternal

信息: Starting service [Catalina]

九月 06, 2018 9:01:32 下午 org.apache.catalina.core.StandardEngine startInternal

信息: Starting Servlet Engine: Apache Tomcat/9.0.10

九月 06, 2018 9:01:34 下午 org.apache.jasper.servlet.TldScanner scanJars

信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.

九月 06, 2018 9:01:36 下午 org.apache.catalina.core.ContainerBase startInternal

严重: A child container failed during start

java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/servlet]]

    at java.util.concurrent.FutureTask.report(FutureTask.java:122)

    at java.util.concurrent.FutureTask.get(FutureTask.java:192)

    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:949)

    at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:839)

    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)

    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1427)

    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1417)

    at java.util.concurrent.FutureTask.run(FutureTask.java:266)

    at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)

    at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)

    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:943)

    at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:258)

    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)

    at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422)

    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)

    at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:770)

    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)

    at org.apache.catalina.startup.Catalina.start(Catalina.java:682)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

    at java.lang.reflect.Method.invoke(Method.java:498)

    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:350)

    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:492)

Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/servlet]]

    at org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:441)

    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:198)

    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1427)

    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1417)

    at java.util.concurrent.FutureTask.run(FutureTask.java:266)

    at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)

    at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)

    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:943)

    ... 21 more

Caused by: java.lang.IllegalArgumentException: Servlet mapping specifies an unknown servlet name [http1]

    at org.apache.catalina.core.StandardContext.addServletMappingDecoded(StandardContext.java:3132)

    at org.apache.catalina.Context.addServletMappingDecoded(Context.java:879)

    at org.apache.catalina.startup.ContextConfig.configureContext(ContextConfig.java:1376)

    at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1187)

    at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:765)

    at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:299)

    at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)

    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5007)

    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)

    ... 27 more

九月 06, 2018 9:01:36 下午 org.apache.catalina.core.ContainerBase startInternal

严重: A child container failed during start

java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: A child container failed during start

    at java.util.concurrent.FutureTask.report(FutureTask.java:122)

    at java.util.concurrent.FutureTask.get(FutureTask.java:192)

    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:949)

    at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:258)

    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)

    at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422)

    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)

    at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:770)

    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)

    at org.apache.catalina.startup.Catalina.start(Catalina.java:682)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

    at java.lang.reflect.Method.invoke(Method.java:498)

    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:350)

    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:492)

Caused by: org.apache.catalina.LifecycleException: A child container failed during start

    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:958)

    at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:839)

    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)

    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1427)

    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1417)

    at java.util.concurrent.FutureTask.run(FutureTask.java:266)

    at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)

    at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)

    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:943)

    ... 13 more

九月 06, 2018 9:01:36 下午 org.apache.catalina.startup.Catalina start

严重: The required Server component failed to start so Tomcat is unable to start.

org.apache.catalina.LifecycleException: A child container failed during start

    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:958)

    at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:258)

    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)

    at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422)

    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)

    at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:770)

    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)

    at org.apache.catalina.startup.Catalina.start(Catalina.java:682)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

    at java.lang.reflect.Method.invoke(Method.java:498)

    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:350)

    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:492)

九月 06, 2018 9:01:36 下午 org.apache.coyote.AbstractProtocol pause

信息: Pausing ProtocolHandler ["http-nio-8080"]

九月 06, 2018 9:01:36 下午 org.apache.coyote.AbstractProtocol pause

信息: Pausing ProtocolHandler ["ajp-nio-8009"]

九月 06, 2018 9:01:36 下午 org.apache.catalina.core.StandardService stopInternal

信息: Stopping service [Catalina]

九月 06, 2018 9:01:36 下午 org.apache.coyote.AbstractProtocol destroy

信息: Destroying ProtocolHandler ["http-nio-8080"]

九月 06, 2018 9:01:36 下午 org.apache.coyote.AbstractProtocol destroy

信息: Destroying ProtocolHandler ["ajp-nio-8009"]

搜原因,有的说是缺少jar包或者有的jar包冲突,也有可能是web.xml配置不正确.

实在没办法了,我重新创建了一个项目.同样的操作结果成了.成功开启了tomcat.

再打开原来错误的项目,终于找到了原因,都是自己马虎所致.

原来是自己的web.xml在某个servlet-name中多了一个空格...然后就一直这样报错!

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