我无法启动tomcat服务器。如果我不打电话给Communications.getvalue（）;然后它工作正常，但当我打电话时它无法启动。 我试图清理项目并重新启动Eclipse，但仍然是同样的问题。 我正在使用tomcat v8.5 让我知道是否有人遇到这个问题。
Web xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<display-name>registration</display-name>
<welcome-file-list>
<welcome-file>registration.jsp</welcome-file>
</welcome-file-list>
<servlet>
<description></description>
<display-name>RegistrationController</display-name>
<servlet-name>RegistrationController</servlet-name>
<servlet-class>com.candidjava.RegistrationController</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>RegistrationController</servlet-name>
<url-pattern>/RegistrationController</url-pattern>
</servlet-mapping>
</web-app>
下面是RegistrationController
package com.candidjava;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.infosys.email.Communications;
import com.infosys.model.ContentsPDF;
import com.itextpdf.text.DocumentException;
/**
* Servlet implementation class UserDataServlet
*/
public class RegistrationController extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
response.setContentType("text/html");
PrintWriter out = response.getWriter();
// if (request.getParameter("save") != null) {
// {
String para1 = request.getParameter("paragraph_text1");
String para2 = request.getParameter("paragraph_text2");
// ContentsPDF cp = new ContentsPDF();
ContentsPDF.setPara1(para1);
ContentsPDF.setPara2(para2);
try {
Communications.getvalue();
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
RequestDispatcher rd = request.getRequestDispatcher("home.jsp");
rd.forward(request, response);
}
}
对不起，这是个例外
Sep 07, 2018 3:10:15 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:registration' did not find a matching property.
Sep 07, 2018 3:10:15 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Server version: Apache Tomcat/8.5.29
Sep 07, 2018 3:10:15 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Server built: Mar 5 2018 13:11:12 UTC
Sep 07, 2018 3:10:15 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Server number: 8.5.29.0
Sep 07, 2018 3:10:15 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: OS Name: Windows Server 2008 R2
Sep 07, 2018 3:10:15 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: OS Version: 6.1
Sep 07, 2018 3:10:15 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Architecture: amd64
Sep 07, 2018 3:10:15 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Java Home: C:\Program Files\Java\jdk1.8.0_172\jre
Sep 07, 2018 3:10:15 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: JVM Version: 1.8.0_172-b11
Sep 07, 2018 3:10:15 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: JVM Vendor: Oracle Corporation
Sep 07, 2018 3:10:15 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: CATALINA_BASE: C:\Users\rajeshkumar_pani\eclipse-workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0
Sep 07, 2018 3:10:15 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: CATALINA_HOME: C:\Program Files\Apache Software Foundation\Tomcat8.5\apache-tomcat-8.5.29
Sep 07, 2018 3:10:15 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Dcatalina.base=C:\Users\rajeshkumar_pani\eclipse-workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0
Sep 07, 2018 3:10:15 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Dcatalina.home=C:\Program Files\Apache Software Foundation\Tomcat8.5\apache-tomcat-8.5.29
Sep 07, 2018 3:10:15 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Dwtp.deploy=C:\Users\rajeshkumar_pani\eclipse-workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps
Sep 07, 2018 3:10:15 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Djava.endorsed.dirs=C:\Program Files\Apache Software Foundation\Tomcat8.5\apache-tomcat-8.5.29\endorsed
Sep 07, 2018 3:10:15 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Dfile.encoding=Cp1252
Sep 07, 2018 3:10:15 PM org.apache.catalina.core.AprLifecycleListener lifecycleEvent
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [C:\Program Files\Java\jdk1.8.0_172\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files/Java/jdk1.8.0_172/bin/../jre/bin/server;C:/Program Files/Java/jdk1.8.0_172/bin/../jre/bin;C:/Program Files/Java/jdk1.8.0_172/bin/../jre/lib/amd64;C:\Program Files\Java\jdk1.8.0_172\bin;C:\Windows\System32;;C:\Users\rajeshkumar_pani\Downloads\eclipse-jee-photon-M6-win32-x86_64\eclipse;;.]
Sep 07, 2018 3:10:15 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-nio-8882"]
Sep 07, 2018 3:10:16 PM org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
INFO: Using a shared selector for servlet write/read
Sep 07, 2018 3:10:16 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["https-jsse-nio-8883"]
Sep 07, 2018 3:10:16 PM org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
INFO: Using a shared selector for servlet write/read
Sep 07, 2018 3:10:16 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-nio-8884"]
Sep 07, 2018 3:10:16 PM org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
INFO: Using a shared selector for servlet write/read
Sep 07, 2018 3:10:16 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 1422 ms
Sep 07, 2018 3:10:16 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service [Catalina]
Sep 07, 2018 3:10:16 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/8.5.29
Sep 07, 2018 3:10:20 PM org.apache.jasper.servlet.TldScanner scanJars
INFO: 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.
Sep 07, 2018 3:10:23 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].StandardContext[/registration]]
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:941)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1421)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1411)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/registration]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
... 6 more
Caused by: java.lang.NoClassDefFoundError: com/itextpdf/text/DocumentException
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Class.java:2583)
at java.lang.Class.getDeclaredFields(Class.java:1916)
at org.apache.catalina.util.Introspection.getDeclaredFields(Introspection.java:110)
at org.apache.catalina.startup.WebAnnotationSet.loadFieldsAnnotation(WebAnnotationSet.java:267)
at org.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:135)
at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:67)
at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:328)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:768)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:299)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:94)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5113)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 6 more
Caused by: java.lang.ClassNotFoundException: com.itextpdf.text.DocumentException
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1291)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1119)
... 19 more
Sep 07, 2018 3:10:23 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:941)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:793)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.startup.Catalina.start(Catalina.java:681)
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:353)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:493)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1421)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1411)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:949)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 6 more
Sep 07, 2018 3:10:23 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[8885]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
at org.apache.catalina.startup.Catalina.start(Catalina.java:681)
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:353)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:493)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Catalina]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:793)
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:167)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422)
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:949)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 11 more
Sep 07, 2018 3:10:23 PM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["http-nio-8882"]
Sep 07, 2018 3:10:23 PM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["https-jsse-nio-8883"]
Sep 07, 2018 3:10:23 PM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["ajp-nio-8884"]
Sep 07, 2018 3:10:23 PM org.apache.catalina.core.StandardService stopInternal
INFO: Stopping service [Catalina]
Sep 07, 2018 3:10:23 PM org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["http-nio-8882"]
Sep 07, 2018 3:10:23 PM org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["https-jsse-nio-8883"]
Sep 07, 2018 3:10:23 PM org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["ajp-nio-8884"]