ClassCastException occured on Solver.solve in spring boot

[常照亮]

Thank you.

 Now that I know that this error is related to spring-boot-devtools, and that the error will not occur if spring-boot-devtools is removed, I wonder if there is a solution without removing spring-boot-devtools

 

java.lang.ClassCastException: com.bugu.queen.persistence.mongodb.domain.period.PeriodSolution cannot be cast to com.bugu.queen.persistence.mongodb.domain.period.PeriodSolution
 at com.bugu.queen.service.solver.score.PeriodScoreCalculator.calculateScore(PeriodScoreCalculator.groovy)
 at org.optaplanner.core.impl.score.director.easy.EasyScoreDirector.calculateScore(EasyScoreDirector.java:60)
 at org.optaplanner.core.impl.solver.recaller.BestSolutionRecaller.solvingStarted(BestSolutionRecaller.java:69)
 at org.optaplanner.core.impl.solver.AbstractSolver.solvingStarted(AbstractSolver.java:76)
 at org.optaplanner.core.impl.solver.DefaultSolver.solvingStarted(DefaultSolver.java:210)
 at org.optaplanner.core.impl.solver.DefaultSolver.solve(DefaultSolver.java:190)
 at org.optaplanner.core.api.solver.Solver$solve.call(Unknown Source)
 at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
 at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:115)
 at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:127)
 at com.bugu.queen.service.CourseScheduleService.solve(CourseScheduleService.groovy:619)
 at com.bugu.queen.service.CourseScheduleService$$FastClassBySpringCGLIB$$6b1e6706.invoke(<generated>)
 at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
 at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:746)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
 at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:88)
 at com.bugu.queen.aop.logging.LoggingAspect.logAround(LoggingAspect.java:85)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498)
 at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)
 at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)
 at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
 at org.springframework.aop.aspectj.AspectJAfterThrowingAdvice.invoke(AspectJAfterThrowingAdvice.java:62)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
 at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
 at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688)
 at com.bugu.queen.service.CourseScheduleService$$EnhancerBySpringCGLIB$$d38767e5.solve(<generated>)
 at com.bugu.queen.service.CourseScheduleService$solve.call(Unknown Source)
 at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
 at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:115)
 at com.bugu.queen.web.rest.management.LectureArrangePlanResource.save(LectureArrangePlanResource.groovy:425)
 at com.bugu.queen.web.rest.management.LectureArrangePlanResource$$FastClassBySpringCGLIB$$a0764314.invoke(<generated>)
 at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
 at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:746)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
 at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:88)
 at com.bugu.queen.aop.logging.LoggingAspect.logAround(LoggingAspect.java:85)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498)
 at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)
 at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)
 at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
 at org.springframework.aop.aspectj.AspectJAfterThrowingAdvice.invoke(AspectJAfterThrowingAdvice.java:62)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
 at org.springframework.security.access.intercept.aopalliance.MethodSecurityInterceptor.invoke(MethodSecurityInterceptor.java:69)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
 at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
 at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688)
 at com.bugu.queen.web.rest.management.LectureArrangePlanResource$$EnhancerBySpringCGLIB$$c492d109.save(<generated>)
 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.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209)
 at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
 at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
 at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:891)
 at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
 at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
 at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991)
 at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
 at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974)
 at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:877)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
 at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
 at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
 at com.codahale.metrics.servlet.AbstractInstrumentedFilter.doFilter(AbstractInstrumentedFilter.java:111)
 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
 at org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:96)
 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
 at org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal(HttpTraceFilter.java:90)
 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:320)
 at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
 at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
 at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:119)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
 at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
 at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
 at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
 at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
 at com.bugu.queen.security.jwt.JWTFilter.doFilter(JWTFilter.java:85)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
 at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
 at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:66)
 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
 at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
 at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)
 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
 at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:215)
 at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178)
 at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357)
 at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270)
 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
 at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
 at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:109)
 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
 at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
 at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:155)
 at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:123)
 at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:108)
 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
 at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
 at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
 at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
 at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
 at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
 at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:65)
 at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
 at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132)
 at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
 at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
 at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
 at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
 at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
 at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
 at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
 at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
 at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
 at io.undertow.servlet.handlers.SessionRestoringHandler.handleRequest(SessionRestoringHandler.java:119)
 at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
 at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)
 at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)
 at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
 at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
 at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
 at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)
 at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
 at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104)
 at io.undertow.server.Connectors.executeRootHandler(Connectors.java:336)
 at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830)
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
 at java.lang.Thread.run(Thread.java:748)

[Geoffrey De Smet]

spring-boot-devtools does some classloader magic
and this seems to give problems even with easy score calculation.

Although some stackoverflow questions seem to indicate that this happens when you got the same class twice in the spring-boot classpath.
To confirm that, put an exception breakpoint on that ClassCastException and use class.getPackage() on both
and then dig down deeper in there until you find the file URL where they both classes come from.
Report those 2 file URL's here.

With kind regards,
Geoffrey De Smet

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[常照亮]

Thank you for answering my question

The packages of the two objects are the same : package com.bugu.queen.persistence.mongodb.domain.period.
在 2019年1月24日星期四 UTC+8下午4:17:22，Geoffrey De Smet写道：

[Geoffrey De Smet]

That doesn't guarantee that they come from the same file url.
You might have the same jar twice on in file system (potentially in different versions) and both were added to your classpath.

When doing runtime debugging, it's possible to ask each Package instance of where on the filesystem it comes from.
You get something like: "file:///foo/bar-1.2.0.jar" for both of them, and they might differ.
Or you could check if they use the same ClassLoader.

With kind regards,
Geoffrey De Smet

[Geoffrey De Smet]

There seems to be a fix in here, see nick's answer:
  https://stackoverflow.com/questions/52606152/optaplanner-got-java-reflection-error-in-spring-boot

With kind regards,
Geoffrey De Smet

On 24/01/2019 03:43, 常照亮 wrote: