在启动java.util.concurrent.ExecutionException期间,子容器失败
我试图创建/运行一个基本JSP,但遇到了以下错误。我看到其他人也有类似的问题,但是,我还没有找到(或正确实施)解决当前问题的方法。任何帮助都将不胜感激在启动java.util.concurrent.ExecutionException期间,子容器失败,java,jsp,tomcat,classnotfoundexception,Java,Jsp,Tomcat,Classnotfoundexception,我试图创建/运行一个基本JSP,但遇到了以下错误。我看到其他人也有类似的问题,但是,我还没有找到(或正确实施)解决当前问题的方法。任何帮助都将不胜感激 SEVERE: A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[C
SEVERE: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/SimpleServletProject]]
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:1123)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:816)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/SimpleServletProject]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
... 6 more
Caused by: java.lang.NoClassDefFoundError: HttpServletRequest
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2693)
at java.lang.Class.getDeclaredMethods(Class.java:1967)
at org.apache.catalina.util.Introspection.getDeclaredMethods(Introspection.java:127)
at org.apache.catalina.startup.WebAnnotationSet.loadMethodsAnnotation(WebAnnotationSet.java:287)
at org.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:140)
at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:65)
at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:415)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:892)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:386)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5380)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 6 more
Caused by: java.lang.ClassNotFoundException: HttpServletRequest
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
... 20 more
Jan 22, 2015 9:04:06 PM org.apache.catalina.core.ContainerBase startInternal
SEVERE: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
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:1123)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:739)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.startup.Catalina.start(Catalina.java:689)
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:483)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:321)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:455)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:816)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 6 more
Jan 22, 2015 9:04:06 PM org.apache.catalina.startup.Catalina start
SEVERE: The required Server component failed to start so Tomcat is unable to start.
org.apache.catalina.LifecycleException: Failed to start component [StandardServer[8005]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.startup.Catalina.start(Catalina.java:689)
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:483)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:321)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:455)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Catalina]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:739)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 7 more
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 9 more
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 11 more
Jan 22, 2015 9:04:06 PM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["http-bio-8080"]
Jan 22, 2015 9:04:06 PM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["ajp-bio-8009"]
Jan 22, 2015 9:04:06 PM org.apache.catalina.core.StandardService stopInternal
INFO: Stopping service Catalina
Jan 22, 2015 9:04:06 PM org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["http-bio-8080"]
Jan 22, 2015 9:04:06 PM org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["ajp-bio-8009"]
您必须已将
servlet api.jar
与war文件中的其他库打包在一起。您可以通过打开war文件并导航到WEB-INF/lib文件夹来验证这一点
理想情况下,您不应该提供servlet api jar。容器(在您的例子中是Tomcat)负责在部署时将其提供给您的应用程序。如果您也尝试提供它,那么由于版本不匹配等原因会出现问题。最佳做法是避免打包它。将其从WEB-INF/lib中删除
其他信息
如果您使用maven进行打包,那么只需添加带有依赖项的提供的标记,maven将确保不在最终的war文件中打包它。差不多
<dependency>
<artifact>..
<group> ...
<version> ...
<scope>provided</scope>
</<dependency>
..
...
...
假如
您的webapp在其/WEB-INF/lib中具有特定于servletcontainer的库,如servlet-api.jar文件。这是不对的
把它们全部去掉
/WEB-INF/lib应该只包含特定于webapp的库,而不包含特定于servletcontainer的库。servletcontainer(像Tomcat)应该已经提供了servletcontainer特定的库
如果您从不同品牌/版本的任意servletcontainer提供库,您将遇到此类问题,因为您的Web应用程序将无法在不同品牌/版本的servletcontainer上运行,而不是这些库的来源
如何解决:
日蚀
右键单击eclipse属性->Java构建路径->添加库->服务器运行库->ApacheTomcat中的项目
Im Maven项目:-
在pom.xml文件中添加以下行
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>${default.javax.servlet.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>${default.javax.servlet.jsp.version}</version>
<scope>provided</scope>
</dependency>
javax.servlet
servlet api
${default.javax.servlet.version}
假如
javax.servlet.jsp
jsp api
${default.javax.servlet.jsp.version}
假如
我在类似的日志中遇到了类似的问题。我在ApacheTomcat7上使用JDK1.6。将java_home设置为1.7解决了问题。检查java_home是否设置为1.7或更低。因为Tomcat7与JDK1.8不兼容
这对我有用这就是对我有用的东西:
1) 将commons-logging.jar添加到WEB-INF/lib文件夹
2) 将此jar添加为maven依赖项,例如,将其添加到pom.xml:
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
公用记录
公用记录
1.2
3) Maven安装
4) 运行服务器
希望对您有所帮助。有时由于java版本和tomcat版本不兼容而出现此问题。请选择两者的兼容版本 删除名为Servers的项目(或包含server.xml的Servers1、Servers2),在包资源管理器(工作区)中找到它
从Eclipse中删除服务器:
转到“窗口>首选项>服务器>运行时环境”,在这里从eclipse中删除您正在使用的服务器并再次添加它(这样做将在eclipse中创建一个新的服务器项目文件夹)
从项目中删除服务器:
还要删除项目中的服务器(构建路径>配置路径>Java构建路径),然后再次添加
现在,您得到了一个新的服务器项目,它的Server.xml上没有多个上下文,只删除Server.xml中的重复路径就解决了现有问题,但仍然无法启动服务器,通过这样做,服务器启动(Apache Tomcat v7)并正常工作
我不知道这是否是一个好的做法,我是编程的新手。面临同样的问题。将JRE更改为正确的1.8版本,并执行maven清理和构建以解决问题。您可能需要更改项目方面并验证正确的路径。我遇到了类似的问题,原因是我在.java文件和web.xml文件中编写了WebServlet路径。从任何一个位置移除它对我来说都很好
在.java文件中
@WebServlet("/index1.jsp")
和在web.xml中
<servlet>
<servlet-name>Logout</servlet-name>
<servlet-class>tpc.Logout</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Logout</servlet-name>
<url-pattern>/index1.jsp</url-pattern>
</servlet-mapping>
注销
tpc.注销
注销
/index1.jsp
下载commons-logging-1.1.1.jar
转到您的项目,构建路径,配置构建路径,java构建路径
添加外部罐子。。添加commons-logging-1.1.1.jar
单击应用,确定
转到project,properties,Deployment Assembly,单击add,Java构建路径条目,接下来,选择commons logging jar,ok,,apply,ok
删除服务器、清理项目、添加服务器、运行项目
我尝试使用http servlet,当我编写重复的@WebServlet时发现此问题,我遇到了此问题。在删除或更改@WebServlet值后,它正在工作
1.班级
@WebServlet("/display")
public class MyFirst extends HttpServlet {
@WebServlet("/display")
public class MySecond extends HttpServlet {
2.班级
@WebServlet("/display")
public class MyFirst extends HttpServlet {
@WebServlet("/display")
public class MySecond extends HttpServlet {
添加了AWS依赖项并出现此错误。当我从pom中删除它时,错误就消失了。可能您也会遇到同样的情况。此问题也可能是由Maven存储库损坏引起的
我观察到严重:在使用Eclipse时,在start
消息中不时出现子容器失败的情况。我的Eclipse工作区有几个项目。有些项目具有共同的外部依赖关系。如果Maven存储库为空(或者我将新的依赖项添加到pom.xml
文件中),Eclipse将开始将pom.xml
中指定的库下载到Maven存储库中。Eclipse对工作区中的多个项目并行执行此操作。可能会有几个Eclipse线程同时将同一文件下载到Maven存储库中的同一位置。因此,此文件将被损坏
所以