Java Tomcat 错误：警告：无法检索容器的 JNDI 命名上下文

Tomcat Error: WARNING: Failed to retrieve JNDI naming context for container

提问by Ryan S

I am encountering the following error within the catalina.2013-12-31.logfile on the Tomcat70/logs/folder, when I attempt to start a recently deployed web application on Tomcat 7.

当我尝试在 Tomcat 7 上启动最近部署的 Web 应用程序时，我catalina.2013-12-31.log在Tomcat70/logs/文件夹上的文件中遇到以下错误。

Dec 31, 2013 10:11:20 AM org.apache.catalina.deploy.NamingResources cleanUp
WARNING: Failed to retrieve JNDI naming context for container [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/crm]] so no cleanup was performed for that container
javax.naming.NameNotFoundException: Name [comp/env] is not bound in this Context. Unable to find [comp].
    at org.apache.naming.NamingContext.lookup(NamingContext.java:820)
    at org.apache.naming.NamingContext.lookup(NamingContext.java:168)
    at org.apache.catalina.deploy.NamingResources.cleanUp(NamingResources.java:977)
    at org.apache.catalina.deploy.NamingResources.stopInternal(NamingResources.java:959)
    at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
    at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5483)
    at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:141)
    at org.apache.catalina.manager.ManagerServlet.start(ManagerServlet.java:1247)
    at org.apache.catalina.manager.HTMLManagerServlet.start(HTMLManagerServlet.java:747)
    at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:222)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:186)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:581)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)

My application is a JDK7 Web Application. I have tried to look for similar questions and tried some suggestions such as restarting the server (in order to get to clear some XML files), but it did not work.

我的应用程序是一个 JDK7 Web 应用程序。我试图寻找类似的问题并尝试了一些建议，例如重新启动服务器（为了清除一些 XML 文件），但没有奏效。

Any ideas please?

请问有什么想法吗？

Update:

更新：

This is what I have in web.xml:

这就是我所拥有的web.xml：

<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
    "http://java.sun.com/dtd/web-app_2_3.dtd">

<web-app>

    <!-- Define CRM session timeout -->
    <session-config>
    <session-timeout>60</session-timeout>
    </session-config>

    <!-- Define servlet-mapped and path-mapped example filters -->
    <filter>
        <filter-name>Servlet Mapped Filter</filter-name>
        <filter-class>Filters.ExampleFilter</filter-class>
    <init-param>
        <param-name>attribute</param-name>
        <param-value>Filters.ExampleFilter.SERVLET_MAPPED</param-value>
    </init-param>
    </filter>
    <filter>
        <filter-name>Path Mapped Filter</filter-name>
        <filter-class>Filters.ExampleFilter</filter-class>
    <init-param>
        <param-name>attribute</param-name>
        <param-value>Filters.ExampleFilter.PATH_MAPPED</param-value>
    </init-param>
    </filter>
    <filter>
        <filter-name>Request Dumper Filter</filter-name>
        <filter-class>Filters.RequestDumperFilter</filter-class>
    </filter>

    <filter>
        <filter-name>Set Character Encoding</filter-name>
        <filter-class>Filters.SetCharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>EUC_JP</param-value>
        </init-param>
    </filter>
    <filter>
        <filter-name>Compression Filter</filter-name>
        <filter-class>CompressionFilters.CompressionFilter</filter-class>
        <init-param>
          <param-name>compressionThreshold</param-name>
          <param-value>10</param-value>
        </init-param>
        <init-param>
          <param-name>debug</param-name>
          <param-value>0</param-value>
        </init-param>
    </filter>

    <!-- Define filter mappings for the defined filters -->
    <filter-mapping>
        <filter-name>Servlet Mapped Filter</filter-name>
    <servlet-name>invoker</servlet-name>
    </filter-mapping>
    <filter-mapping>
        <filter-name>Path Mapped Filter</filter-name>
    <url-pattern>/servlet/*</url-pattern>
    </filter-mapping>

    <!-- Define example application events listeners -->
    <listener>
        <listener-class>Listeners.ContextListener</listener-class>
    </listener>
    <listener>
        <listener-class>Listeners.SessionListener</listener-class>
    </listener>

    <!-- Define servlets that are included in the example application -->
    <servlet>
        <servlet-name>SendMailServlet</servlet-name>
        <servlet-class>SendMailServlet</servlet-class>
    </servlet>

    <servlet>
        <servlet-name>
            snoop
        </servlet-name>
        <servlet-class>
            SnoopServlet
        </servlet-class>
        <run-as>
            <description>Security role for anonymous access</description>
            <role-name>tomcat</role-name>
        </run-as>
    </servlet>

    <servlet>
      <servlet-name>
          servletToJsp
      </servlet-name>
      <servlet-class>
          servletToJsp
      </servlet-class>
    </servlet>
    <servlet>
        <servlet-name>
            CompressionFilterTestServlet
        </servlet-name>
        <servlet-class>
            CompressionFilters.CompressionFilterTestServlet
        </servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>
            CompressionFilterTestServlet
        </servlet-name>
        <url-pattern>
            /CompressionTest
        </url-pattern>
    </servlet-mapping>

    <servlet-mapping>
        <servlet-name>SendMailServlet</servlet-name>
        <url-pattern>/SendMailServlet</url-pattern>
    </servlet-mapping>

    <servlet-mapping>
        <servlet-name>
            snoop
        </servlet-name>
        <url-pattern>
            /snoop
        </url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>
            servletToJsp
        </servlet-name>
        <url-pattern>
            /servletToJsp
        </url-pattern>
    </servlet-mapping>

    <!-- Added 11/02/2013 - Ryan Sammut -->
    <!-- Servlet Mapping -->
    <servlet>
        <servlet-name>AddNewContact</servlet-name> 
        <servlet-class>Crm.Servlets.AddNewContact</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>AddNewContact</servlet-name> 
        <url-pattern>/servlet/AddNewContact</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>AddTip</servlet-name> 
        <servlet-class>Crm.Servlets.AddTip</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>AddTip</servlet-name> 
        <url-pattern>/servlet/AddTip</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>CaaPdfOutputter</servlet-name> 
        <servlet-class>Crm.Servlets.CaaPdfOutputter</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>CaaPdfOutputter</servlet-name> 
        <url-pattern>/servlet/CaaPdfOutputter</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>CaaTestSubmit</servlet-name> 
        <servlet-class>Crm.Servlets.CaaTestSubmit</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>CaaTestSubmit</servlet-name> 
        <url-pattern>/servlet/CaaTestSubmit</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>DeleteTip</servlet-name> 
        <servlet-class>Crm.Servlets.DeleteTip</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>DeleteTip</servlet-name> 
        <url-pattern>/servlet/DeleteTip</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>DestinationCustomerFinancialAdvisorRefresh</servlet-name> 
        <servlet-class>Crm.Servlets.DestinationCustomerFinancialAdvisorRefresh</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>DestinationCustomerFinancialAdvisorRefresh</servlet-name> 
        <url-pattern>/servlet/DestinationCustomerFinancialAdvisorRefresh</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>DestinationCustomerRefresh</servlet-name> 
        <servlet-class>Crm.Servlets.DestinationCustomerRefresh</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>DestinationCustomerRefresh</servlet-name> 
        <url-pattern>/servlet/DestinationCustomerRefresh</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>DestinationCustomerShadowFinancialAdvisorRefresh</servlet-name> 
        <servlet-class>Crm.Servlets.DestinationCustomerShadowFinancialAdvisorRefresh</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>DestinationCustomerShadowFinancialAdvisorRefresh</servlet-name> 
        <url-pattern>/servlet/DestinationCustomerShadowFinancialAdvisorRefresh</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>DestinationOfficerControl</servlet-name> 
        <servlet-class>Crm.Servlets.DestinationOfficerControl</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>DestinationOfficerControl</servlet-name> 
        <url-pattern>/servlet/DestinationOfficerControl</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>DestinationOfficerFinancialAdvisorControl</servlet-name> 
        <servlet-class>Crm.Servlets.DestinationOfficerFinancialAdvisorControl</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>DestinationOfficerFinancialAdvisorControl</servlet-name> 
        <url-pattern>/servlet/DestinationOfficerFinancialAdvisorControl</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>DestinationOfficerShadowFinancialAdvisorControl</servlet-name> 
        <servlet-class>Crm.Servlets.DestinationOfficerShadowFinancialAdvisorControl</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>DestinationOfficerShadowFinancialAdvisorControl</servlet-name> 
        <url-pattern>/servlet/DestinationOfficerShadowFinancialAdvisorControl</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>FactFindControl</servlet-name> 
        <servlet-class>Crm.Servlets.FactFindControl</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>FactFindControl</servlet-name> 
        <url-pattern>/servlet/FactFindControl</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>InsertAddedCustomerFinancialAdvisor</servlet-name> 
        <servlet-class>Crm.Servlets.InsertAddedCustomerFinancialAdvisor</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>InsertAddedCustomerFinancialAdvisor</servlet-name> 
        <url-pattern>/servlet/InsertAddedCustomerFinancialAdvisor</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>InsertAddedCustomerRelationshipOfficer</servlet-name> 
        <servlet-class>Crm.Servlets.InsertAddedCustomerRelationshipOfficer</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>InsertAddedCustomerRelationshipOfficer</servlet-name> 
        <url-pattern>/servlet/InsertAddedCustomerRelationshipOfficer</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>InsertAddedCustomerShadowFinancialAdvisor</servlet-name> 
        <servlet-class>Crm.Servlets.InsertAddedCustomerShadowFinancialAdvisor</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>InsertAddedCustomerShadowFinancialAdvisor</servlet-name> 
        <url-pattern>/servlet/InsertAddedCustomerShadowFinancialAdvisor</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>KYCControl</servlet-name> 
        <servlet-class>Crm.Servlets.KYCControl</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>KYCControl</servlet-name> 
        <url-pattern>/servlet/KYCControl</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>LeadAssignmentTransfer</servlet-name> 
        <servlet-class>Crm.Servlets.LeadAssignmentTransfer</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>LeadAssignmentTransfer</servlet-name> 
        <url-pattern>/servlet/LeadAssignmentTransfer</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>LeadAssignmentView</servlet-name> 
        <servlet-class>Crm.Servlets.LeadAssignmentView</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>LeadAssignmentView</servlet-name> 
        <url-pattern>/servlet/LeadAssignmentView</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>LeadDetailsGenerator</servlet-name> 
        <servlet-class>Crm.Servlets.LeadDetailsGenerator</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>LeadDetailsGenerator</servlet-name> 
        <url-pattern>/servlet/LeadDetailsGenerator</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>ListAddedCustomerFinancialAdvisor</servlet-name> 
        <servlet-class>Crm.Servlets.ListAddedCustomerFinancialAdvisor</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>ListAddedCustomerFinancialAdvisor</servlet-name> 
        <url-pattern>/servlet/ListAddedCustomerFinancialAdvisor</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>ListAddedCustomerRelationshipOfficer</servlet-name> 
        <servlet-class>Crm.Servlets.ListAddedCustomerRelationshipOfficer</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>ListAddedCustomerRelationshipOfficer</servlet-name> 
        <url-pattern>/servlet/ListAddedCustomerRelationshipOfficer</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>ListAddedCustomerShadowFinancialAdvisor</servlet-name> 
        <servlet-class>Crm.Servlets.ListAddedCustomerShadowFinancialAdvisor</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>ListAddedCustomerShadowFinancialAdvisor</servlet-name> 
        <url-pattern>/servlet/ListAddedCustomerShadowFinancialAdvisor</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>RemoveCustomerFinancialAdvisor</servlet-name> 
        <servlet-class>Crm.Servlets.RemoveCustomerFinancialAdvisor</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>RemoveCustomerFinancialAdvisor</servlet-name> 
        <url-pattern>/servlet/RemoveCustomerFinancialAdvisor</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>RemoveCustomerRelationshipOfficer</servlet-name> 
        <servlet-class>Crm.Servlets.RemoveCustomerRelationshipOfficer</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>RemoveCustomerRelationshipOfficer</servlet-name> 
        <url-pattern>/servlet/RemoveCustomerRelationshipOfficer</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>RemoveCustomerShadowFinancialAdvisor</servlet-name> 
        <servlet-class>Crm.Servlets.RemoveCustomerShadowFinancialAdvisor</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>RemoveCustomerShadowFinancialAdvisor</servlet-name> 
        <url-pattern>/servlet/RemoveCustomerShadowFinancialAdvisor</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>RetrieveTips</servlet-name> 
        <servlet-class>Crm.Servlets.RetrieveTips</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>RetrieveTips</servlet-name> 
        <url-pattern>/servlet/RetrieveTips</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>SourceCustomerFinancialAdvisorRefresh</servlet-name> 
        <servlet-class>Crm.Servlets.SourceCustomerFinancialAdvisorRefresh</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>SourceCustomerFinancialAdvisorRefresh</servlet-name> 
        <url-pattern>/servlet/SourceCustomerFinancialAdvisorRefresh</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>SourceCustomerRefresh</servlet-name> 
        <servlet-class>Crm.Servlets.SourceCustomerRefresh</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>SourceCustomerRefresh</servlet-name> 
        <url-pattern>/servlet/SourceCustomerRefresh</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>SourceCustomerShadowFinancialAdvisorRefresh</servlet-name> 
        <servlet-class>Crm.Servlets.SourceCustomerShadowFinancialAdvisorRefresh</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>SourceCustomerShadowFinancialAdvisorRefresh</servlet-name> 
        <url-pattern>/servlet/SourceCustomerShadowFinancialAdvisorRefresh</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>SourceOfficerControl</servlet-name> 
        <servlet-class>Crm.Servlets.SourceOfficerControl</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>SourceOfficerControl</servlet-name> 
        <url-pattern>/servlet/SourceOfficerControl</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>SourceOfficerFinancialAdvisorControl</servlet-name> 
        <servlet-class>Crm.Servlets.SourceOfficerFinancialAdvisorControl</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>SourceOfficerFinancialAdvisorControl</servlet-name> 
        <url-pattern>/servlet/SourceOfficerFinancialAdvisorControl</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>SourceOfficerShadowFinancialAdvisorControl</servlet-name> 
        <servlet-class>Crm.Servlets.SourceOfficerShadowFinancialAdvisorControl</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>SourceOfficerShadowFinancialAdvisorControl</servlet-name> 
        <url-pattern>/servlet/SourceOfficerShadowFinancialAdvisorControl</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>TransferCustomerFinancialAdvisor</servlet-name> 
        <servlet-class>Crm.Servlets.TransferCustomerFinancialAdvisor</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>TransferCustomerFinancialAdvisor</servlet-name> 
        <url-pattern>/servlet/TransferCustomerFinancialAdvisor</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>TransferCustomerRelationshipOfficer</servlet-name> 
        <servlet-class>Crm.Servlets.TransferCustomerRelationshipOfficer</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>TransferCustomerRelationshipOfficer</servlet-name> 
        <url-pattern>/servlet/TransferCustomerRelationshipOfficer</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>TransferCustomerShadowFinancialAdvisor</servlet-name> 
        <servlet-class>Crm.Servlets.TransferCustomerShadowFinancialAdvisor</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>TransferCustomerShadowFinancialAdvisor</servlet-name> 
        <url-pattern>/servlet/TransferCustomerShadowFinancialAdvisor</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>UpdateCustomerMonitoringUnit</servlet-name> 
        <servlet-class>Crm.Servlets.UpdateCustomerMonitoringUnit</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>UpdateCustomerMonitoringUnit</servlet-name> 
        <url-pattern>/servlet/UpdateCustomerMonitoringUnit</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>SohPdfOutputter</servlet-name> 
        <servlet-class>Crm.Servlets.SohPdfOutputter</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>SohPdfOutputter</servlet-name> 
        <url-pattern>/servlet/SohPdfOutputter</url-pattern> 
    </servlet-mapping>

    <servlet>
        <servlet-name>variouscontrol</servlet-name> 
        <servlet-class>Crm.Servlets.variouscontrol</servlet-class> 
    </servlet>
    <servlet-mapping>
        <servlet-name>variouscontrol</servlet-name> 
        <url-pattern>/servlet/variouscontrol</url-pattern> 
    </servlet-mapping>

    <taglib>
        <taglib-uri>
       http://jakarta.apache.org/tomcat/debug-taglib
        </taglib-uri>
        <taglib-location>
           /WEB-INF/jsp/debug-taglib.tld
        </taglib-location>
    </taglib>

    <taglib>
        <taglib-uri>
       http://jakarta.apache.org/tomcat/examples-taglib
        </taglib-uri>
        <taglib-location>
           /WEB-INF/jsp/example-taglib.tld
        </taglib-location>
    </taglib>

    <resource-ref>
      <res-ref-name>mail/Session</res-ref-name>
      <res-type>javax.mail.Session</res-type>
      <res-auth>Container</res-auth>
    </resource-ref>

    <security-constraint>
      <display-name>Example Security Constraint</display-name>
      <web-resource-collection>
         <web-resource-name>Protected Area</web-resource-name>
     <!-- Define the context-relative URL(s) to be protected -->
         <url-pattern>/jsp/security/protected/*</url-pattern>
     <!-- If you list http methods, only those methods are protected -->
     <http-method>DELETE</http-method>
         <http-method>GET</http-method>
         <http-method>POST</http-method>
     <http-method>PUT</http-method>
      </web-resource-collection>
      <auth-constraint>
         <!-- Anyone with one of the listed roles may access this area -->
         <role-name>tomcat</role-name>
     <role-name>role1</role-name>
      </auth-constraint>
    </security-constraint>

    <!-- Default login configuration uses form-based authentication -->
    <login-config>
      <auth-method>FORM</auth-method>
      <realm-name>Example Form-Based Authentication Area</realm-name>
      <form-login-config>
        <form-login-page>/jsp/security/protected/login.jsp</form-login-page>
        <form-error-page>/jsp/security/protected/error.jsp</form-error-page>
      </form-login-config>
    </login-config>

    <!-- Environment entry examples -->
    <!--env-entry>
      <env-entry-description>
         The maximum number of tax exemptions allowed to be set.
      </env-entry-description>
      <env-entry-name>maxExemptions</env-entry-name>
      <env-entry-value>15</env-entry-value>
      <env-entry-type>java.lang.Integer</env-entry-type>
    </env-entry-->
    <env-entry>
      <env-entry-name>minExemptions</env-entry-name>
      <env-entry-value>1</env-entry-value>
      <env-entry-type>java.lang.Integer</env-entry-type>
    </env-entry>
    <env-entry>
      <env-entry-name>foo/name1</env-entry-name>
      <env-entry-value>value1</env-entry-value>
      <env-entry-type>java.lang.String</env-entry-type>
    </env-entry>
    <env-entry>
      <env-entry-name>foo/bar/name2</env-entry-name>
      <env-entry-value>true</env-entry-value>
      <env-entry-type>java.lang.Boolean</env-entry-type>
    </env-entry>
    <env-entry>
      <env-entry-name>name3</env-entry-name>
      <env-entry-value>1</env-entry-value>
      <env-entry-type>java.lang.Integer</env-entry-type>
    </env-entry>
    <env-entry>
      <env-entry-name>foo/name4</env-entry-name>
      <env-entry-value>10</env-entry-value>
      <env-entry-type>java.lang.Integer</env-entry-type>
    </env-entry>

    <!-- EJB Reference -->
    <ejb-ref>
      <description>Example EJB Reference</description>
      <ejb-ref-name>ejb/Account</ejb-ref-name>
      <ejb-ref-type>Entity</ejb-ref-type>
      <home>com.mycompany.mypackage.AccountHome</home>
      <remote>com.mycompany.mypackage.Account</remote>
    </ejb-ref>

    <!-- Local EJB Reference -->
    <ejb-local-ref>
      <description>Example Local EJB Reference</description>
      <ejb-ref-name>ejb/ProcessOrder</ejb-ref-name>
      <ejb-ref-type>Session</ejb-ref-type>
      <local-home>com.mycompany.mypackage.ProcessOrderHome</local-home>
      <local>com.mycompany.mypackage.ProcessOrder</local>
    </ejb-local-ref>
</web-app>

Server's context.xmlin /Tomcat70/conf/:

服务器context.xml在/Tomcat70/conf/：

<?xml version='1.0' encoding='utf-8'?>
<Context>
   <WatchedResource>WEB-INF/web.xml</WatchedResource>
</Context>

回答by Prasenjit Purohit

I recently faced this strange issue and the answer is the manifest file is not of right encoding or have non visible junc character. It might happen if the file is created in unix environment and you are running it in windows.

我最近遇到了这个奇怪的问题，答案是清单文件的编码不正确或具有不可见的连接字符。如果文件是在 unix 环境中创建的并且您在 windows 中运行它，则可能会发生这种情况。

solution is to recreate the file witj UTF-8 encoding.

解决方案是用 UTF-8 编码重新创建文件。

回答by mike_b

That's quite a weird problem, but I resolved it by carefully checking web.xml of my project. This same problem occurred when I added 1 wrong servlet config line to web.xml and it disappeared when removed it. So check your web.xml very carefully and reverse all recent changes to it - if it makes it work, just correct the config errors you just made

这是一个很奇怪的问题，但我通过仔细检查我的项目的 web.xml 解决了它。当我将 1 个错误的 servlet 配置行添加到 web.xml 时发生了同样的问题，并且在删除它时它消失了。因此，非常仔细地检查您的 web.xml 并撤消所有最近对它的更改 - 如果它可以正常工作，只需更正您刚刚所做的配置错误

回答by Kristjan Veskim?e

I got this error when Eclipse overwrote my server.xml, particularly removing JNDI dependancy from one of my contexts:

当 Eclipse 覆盖我的 server.xml 时，我收到此错误，特别是从我的上下文之一中删除 JNDI 依赖项：

        <Context
            docBase="myapp"
            path="/myapp"
            reloadable="true"
            source="org.eclipse.jst.j2ee.server:myapp"
        >
            <Resource
                name="jdbc/myDataSource"
                auth="Container"
                type="javax.sql.DataSource"
                ... />
        </Context>

The obvious solution - modify "Servers"-> "Tomcat v7" -> server.xml in Eclipse again manually and add 'Resource' element back.

显而易见的解决方案 - 在 Eclipse 中再次手动修改“Servers”->“Tomcat v7”-> server.xml 并添加回“Resource”元素。

回答by Upul

I removed my server and re add it . worked

我删除了我的服务器并重新添加它。工作过

回答by Hendranto Nugroho

May be this is the old question... but we can become lesson learned for others...

可能这是个老问题……但我们可以成为其他人的经验教训……

I got the same errors... and I removed runtime from the server, I remove all the repositories in .m2/repositories, Maven update, compile and it works

我遇到了同样的错误......我从服务器中删除了运行时，我删除了 .m2/repositories 中的所有存储库，Maven 更新，编译并且它可以工作

回答by jmcg

Mine went away after cleaning Tomcat server.

我的在清理 Tomcat 服务器后就消失了。

回答by Jarekczek

Restart Tomcat.

重启Tomcat。

Mine got broken after the test servlet caused exceptions.

在测试 servlet 导致异常后，我的崩溃了。

回答by Dominic Weiser

I had the same Error today. Then I performed a Clean on Tomcat Server, which told me there are several Maven POMs missing. So I performed a Maven Update Project (Eclipse: Right Click on Project -> Maven -> Update Projects.. -> Select your needed Projects). This solves the Problem for me.

我今天有同样的错误。然后我在 Tomcat 服务器上执行了一次清理，它告诉我缺少几个 Maven POM。所以我执行了一个 Maven 更新项目（Eclipse：右键单击项目 -> Maven -> 更新项目.. -> 选择你需要的项目）。这为我解决了问题。

回答by Yacino

I had the same problem.

我有同样的问题。

I was using Tomcat 8.5, and I used JNDI to configure access to an MySQL database, I used the MySQL-connector jar version 8, in my java application,

我使用的是 Tomcat 8.5，我使用 JNDI 来配置对 MySQL 数据库的访问，我在我的 java 应用程序中使用了 MySQL-connector jar 版本 8，

I solve it by using MySQL-connector jar version 5.

我使用 MySQL-connector jar 版本 5 解决了它。

回答by Bhaskara Arani

open server configuration by double-clicking on the server name. after that check the checkbox of "Publish module contexts to separate XML files". and then restart the server

通过双击服务器名称打开服务器配置。之后，选中“将模块上下文发布到单独的 XML 文件”复选框。 然后重启服务器

Sometimes, It's worked by removing and adding the server will resolves this issue

有时，它通过删除和添加服务器来解决这个问题