java.lang.NoClassDefFoundError :: Tomcat 中给定路径中存在的类
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时间：2020-10-31 16:31:25 来源:igfitidea点击:
java.lang.NoClassDefFoundError :: Class present at the given path in Tomcat
提问by Harry K
I am currently facing with a problem where I am running a Jasper report application.
我目前面临运行 Jasper 报告应用程序的问题。
After invoking a report generation request I am facing
java.lang.NoClassDefFoundError
调用报告生成请求后，我面临
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
I verified that the class is present at the appropriate path under the tomcat/WEB-INF/classesfolder.
我验证了该类存在于tomcat/WEB-INF/classes文件夹下的适当路径中。
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：
[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]
I am not able to figure out why, despite the class is successfully loaded, am getting error.
尽管类已成功加载，但我无法弄清楚为什么会出错。
Appreciate your help
感谢你的帮助
Thanks
谢谢
Added Stack trace below
在下面添加了堆栈跟踪
> 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
回答by sschrass
NoClassDefFoundindicates, that everything was okay at compile time, but not at runtime. Maybe some of your .jarsare missing on your tomcat. You have to add them to tomcat classpath or copy them to the JRE your tomcat is running on.
NoClassDefFound表明，在编译时一切正常，但在运行时则不然。也许你的.jars一些在你的 tomcat 上丢失了。您必须将它们添加到 tomcat 类路径或将它们复制到您的 tomcat 正在运行的 JRE。
here Why am I getting a NoClassDefFoundError in Java?you may find some more information/explanation.
这里为什么我在 Java 中收到 NoClassDefFoundError 错误？您可能会找到更多信息/解释。
and here Jars not copied to Tomcat's lib folderis a thread about setting up eclipse to deploy dependencies automatically.
在这里，未复制到 Tomcat 的 lib 文件夹中的Jars是一个关于设置 eclipse 以自动部署依赖项的线程。
回答by Italo Borssatto
Some clarifications:
一些澄清：
NoClassDefFoundError!=ClassNotFoundExceptionNoClassDefFoundErrorusually means that the JVM once tried to instantiate that class but failed on doing it.
NoClassDefFoundError!=ClassNotFoundExceptionNoClassDefFoundError通常意味着 JVM 曾经尝试实例化该类，但未能成功。
So, some tips:
所以，一些提示：
- Look for the first exception with that class.
- Look for some
ExceptionInInitializerErrorbefore theNoClassDefFoundError - Probably the error is in the
staticblocks of your class.
- 查找该类的第一个异常。
ExceptionInInitializerError在之前寻找一些NoClassDefFoundError- 错误可能出在
static您班级的块中。
