. lang。NoClassDefFoundError:在Tomcat [duplicate]中显示给定路径的类

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Why am I getting a NoClassDefFoundError in Java? 18 answers
为什么我在Java中得到一个NoClassDefFoundError ?18个答案

I am currently facing with a problem where I am running a Jasper report application.

我目前正面临一个问题，我正在运行一个Jasper报告应用程序。

After invoking a report generation request I am facing java.lang.NoClassDefFoundError

在调用报表生成请求之后，我将面对java.lang.NoClassDefFoundError

for an application class e.g. com.abcd.framework.web.servicelocator.ServiceLocator

对于应用程序类，例如com.abcd.framework.web.servicelocator.ServiceLocator .servicelocator

I verified that the class is present at the appropriate path under the tomcat/WEB-INF/classes folder.

我验证了类存在于tomcat/WEB-INF/classes文件夹下的适当路径。

I also enabled Tomcat classloader logs with

我还启用了Tomcat类加载器日志

JAVA_OPTS = -XX:+TraceClassLoading -XX:+TraceClassUnloading

the relevant log: [Loaded com.abcd.framework.web.servicelocator.ServiceLocator from file:/C:/3.0/tomcat-6.0-Jasper/webapps/jasperserver-pro/WEB-INF/classes/com/abcd/framework/web/servicelocator/ServiceLocator.class]

相关日志:[已载入com.abcd.framework.web.servicelocator.ServiceLocator文件:/C:/3.0/tomcat-6.0-Jasper/webapps/jasperserver-pro/WEB-INF/class / com/abcd/framework/web/servicelocator/servicelocator/servicelocator/servicelocator/servicelocator/servicelocator.class]

I am not able to figure out why, despite the class is successfully loaded, am getting error.

我不明白为什么，尽管类已经成功加载，但仍然会出现错误。

Appreciate your help

感谢你的帮助

Thanks

谢谢

Added Stack trace below

添加下面的堆栈跟踪

> 14:43:28,538 ERROR ManagementServiceImpl,http-30880-1:1294 - caught
> Throwable exception: java.lang.NoClassDefFoundError: Could not
> initialize class com.abcd.framework.web.servicelocator.ServiceLocator
> com.jaspersoft.jasperserver.api.JSException:
> java.lang.NoClassDefFoundError: Could not initialize class
> com.abcd.framework.web.servicelocator.ServiceLocator  at
> com.jaspersoft.jasperserver.api.engine.jasperreports.service.impl.EngineServiceImpl.fillReport(EngineServiceImpl.java:497)
>   at
> com.jaspersoft.jasperserver.api.engine.jasperreports.service.impl.EngineServiceImpl.executeReportUnitRequest(EngineServiceImpl.java:1666)
>   at
> com.jaspersoft.jasperserver.api.engine.jasperreports.domain.impl.ReportUnitRequest.execute(ReportUnitRequest.java:67)
>   at
> com.jaspersoft.jasperserver.api.engine.jasperreports.service.impl.EngineServiceImpl.execute(EngineServiceImpl.java:399)
>   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>   at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>   at java.lang.reflect.Method.invoke(Method.java:601)     at
> org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:318)
>   at
> org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
>   at
> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
>   at
> org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:80)
>   at
> com.jaspersoft.ji.license.LicenseCheckAspect.runReport(LicenseCheckAspect.java:113)
>   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>   at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>   at java.lang.reflect.Method.invoke(Method.java:601)     at
> org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621)
>   at
> org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610)
>   at
> org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:65)
>   at
> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:161)
>   at
> org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:90)
>   at
> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
>   at
> org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
>   at $Proxy210.execute(Unknown Source)    at
> com.jaspersoft.ji.adhoc.service.AdhocEngineServiceImpl.execute(AdhocEngineServiceImpl.java:2243)
>   at
> com.jaspersoft.jasperserver.ws.axis2.ManagementServiceImpl.runReport(ManagementServiceImpl.java:1200)
>   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>   at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>   at java.lang.reflect.Method.invoke(Method.java:601)     at
> org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:318)
>   at
> org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
>   at
> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
>   at
> org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:80)
>   at
> com.jaspersoft.ji.license.LicenseCheckAspect.executeMSCall(LicenseCheckAspect.java:118)
>   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>   at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>   at java.lang.reflect.Method.invoke(Method.java:601)     at
> org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621)
>   at
> org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610)
>   at
> org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:65)
>   at
> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
>   at
> org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:90)
>   at
> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
>   at
> org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
>   at $Proxy267.runReport(Unknown Source)  at
> com.jaspersoft.jasperserver.ws.axis2.ManagementService.runReport(ManagementService.java:240)
>   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>   at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>   at java.lang.reflect.Method.invoke(Method.java:601)     at
> org.apache.axis.providers.java.RPCProvider.invokeMethod(RPCProvider.java:397)
>   at
> org.apache.axis.providers.java.RPCProvider.processMessage(RPCProvider.java:186)
>   at
> org.apache.axis.providers.java.JavaProvider.invoke(JavaProvider.java:323)
>   at
> org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
>   at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)     at
> org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)   at
> org.apache.axis.handlers.soap.SOAPService.invoke(SOAPService.java:453)
>   at org.apache.axis.server.AxisServer.invoke(AxisServer.java:281)    at
> org.apache.axis.transport.http.AxisServlet.doPost(AxisServlet.java:699)
>   at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)     at
> org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
>   at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)     at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
>   at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>   at
> org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:399)
>   at
> org.springframework.security.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:109)
>   at
> org.springframework.security.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)
>   at
> org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)
>   at
> org.springframework.security.ui.ExceptionTranslationFilter.doFilterHttp(ExceptionTranslationFilter.java:101)
>   at
> org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
>   at
> org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)
>   at
> com.jaspersoft.ji.license.JILicenseFilter.doFilter(JILicenseFilter.java:66)
>   at
> org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)
>   at
> org.springframework.security.providers.anonymous.AnonymousProcessingFilter.doFilterHttp(AnonymousProcessingFilter.java:105)
>   at
> org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
>   at
> org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)
>   at
> com.jaspersoft.jasperserver.api.metadata.user.service.impl.MetadataAuthenticationProcessingFilter.doFilter(MetadataAuthenticationProcessingFilter.java:139)
>   at
> org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)
>   at
> com.jaspersoft.jasperserver.api.metadata.user.service.impl.PasswordExpirationProcessingFilter.doFilter(PasswordExpirationProcessingFilter.java:85)
>   at
> org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)
>   at
> com.jaspersoft.jasperserver.multipleTenancy.MTBasicProcessingFilter.doFilterHttp(MTBasicProcessingFilter.java:180)
>   at
> org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
>   at
> org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)
>   at
> com.jaspersoft.jasperserver.api.metadata.user.service.impl.JIPortletAuthenticationProcessingFilter.doFilter(JIPortletAuthenticationProcessingFilter.java:81)
>   at
> org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)
>   at
> com.jaspersoft.jasperserver.api.logging.filter.BasicLoggingFilter.doFilter(BasicLoggingFilter.java:53)
>   at
> org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)
>   at
> org.springframework.security.context.HttpSessionContextIntegrationFilter.doFilterHttp(HttpSessionContextIntegrationFilter.java:235)
>   at
> org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
>   at
> org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)
>   at
> org.springframework.security.util.FilterChainProxy.doFilter(FilterChainProxy.java:188)
>   at
> org.springframework.security.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:99)
>   at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
>   at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>   at
> com.jaspersoft.jasperserver.war.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:67)
>   at
> org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
>   at
> org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
>   at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
>   at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>   at
> com.jaspersoft.jasperserver.war.P3PFilter.doFilter(P3PFilter.java:43)
>   at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
>   at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>   at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
>   at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
>   at
> org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:558)
>   at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
>   at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
>   at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>   at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
>   at
> org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859)
>   at
> org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
>   at
> org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555)
>   at java.lang.Thread.run(Thread.java:722) Caused by:
> java.lang.NoClassDefFoundError: Could not initialize class
> com.abcd.framework.web.servicelocator.ServiceLocator  at
> com.abcd.myproject.service.ReportProcessingService.fetchReportRecords(ReportProcessingService.java:810)
>   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>   at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>   at java.lang.reflect.Method.invoke(Method.java:601)     at
> org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:318)
>   at
> org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
>   at
> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
>   at
> org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
>   at
> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
>   at
> org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
>   at $Proxy268.fetchReportRecordsForCTR275(Unknown Source)    at
> com.abcd.myproject.ReportDataSourceServiceImpl.setReportParameterValues(ReportDataSourceServiceImpl.java:79)
>   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>   at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>   at java.lang.reflect.Method.invoke(Method.java:601)     at
> org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:318)
>   at
> org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
>   at
> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
>   at
> org.springframework.aop.framework.adapter.AfterReturningAdviceInterceptor.invoke(AfterReturningAdviceInterceptor.java:50)
>   at
> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
>   at
> org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
>   at $Proxy315.setReportParameterValues(Unknown Source)   at
> com.jaspersoft.jasperserver.api.engine.jasperreports.service.impl.EngineServiceImpl.fillReport(EngineServiceImpl.java:1463)
>   at
> com.jaspersoft.jasperserver.api.engine.jasperreports.service.impl.EngineServiceImpl$ReportFill.runReport(EngineServiceImpl.java:874)
>   at
> com.jaspersoft.jasperserver.api.engine.jasperreports.service.impl.EngineServiceImpl$ReportRunnable.run(EngineServiceImpl.java:754)
>   at
> com.jaspersoft.jasperserver.api.engine.jasperreports.service.impl.EngineServiceImpl$SynchronousExecutor.execute(EngineServiceImpl.java:733)
>   at
> com.jaspersoft.jasperserver.api.engine.jasperreports.service.impl.EngineServiceImpl.fillReport(EngineServiceImpl.java:488)
>   ... 115 more

2 个解决方案

#1

NoClassDefFound indicates, that everything was okay at compile time, but not at runtime. Maybe some of your .jars are missing on your tomcat. You have to add them to tomcat classpath or copy them to the JRE your tomcat is running on.

NoClassDefFound表示，编译时一切正常，但运行时不行。可能tomcat上缺少一些.jars。您必须将它们添加到tomcat类路径，或者将它们复制到tomcat正在运行的JRE中。

here Why am I getting a NoClassDefFoundError in Java? you may find some more information/explanation.

为什么我要在Java中获得NoClassDefFoundError ?你可以找到更多的信息/解释。

and here Jars not copied to Tomcat's lib folder is a thread about setting up eclipse to deploy dependencies automatically.

这里没有复制到Tomcat的lib文件夹的jar是一个关于设置eclipse来自动部署依赖项的线程。

#2

Some clarifications:

一些说明:

NoClassDefFoundError != ClassNotFoundException
NoClassDefFoundError ! = ClassNotFoundException
NoClassDefFoundError usually means that the JVM once tried to instantiate that class but failed on doing it.
NoClassDefFoundError通常意味着JVM曾经尝试实例化该类，但失败了。

So, some tips:

所以,一些技巧:

Look for the first exception with that class.
查找该类的第一个异常。
Look for some ExceptionInInitializerError before the NoClassDefFoundError
在NoClassDefFoundError之前查找一些ExceptionInInitializerError
Probably the error is in the static blocks of your class.
可能错误出现在类的静态块中。

#1