大数据开发中遇到的错误 java.lang.RuntimeException: java.io.IOException: invalid constant type: 18

版本打包时竟然遇到这种错误

严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListenerjava.lang.RuntimeException: java.io.IOException: invalid constant type: 18 at javassist.CtClassType.getClassFile2(CtClassType.java:204) at javassist.CtClassType.subtypeOf(CtClassType.java:304) at javassist.CtClassType.subtypeOf(CtClassType.java:319) at javassist.compiler.MemberResolver.compareSignature(MemberResolver.java:248) at javassist.compiler.MemberResolver.lookupMethod(MemberResolver.java:120) at javassist.compiler.MemberResolver.lookupMethod(MemberResolver.java:97) at javassist.compiler.TypeChecker.atMethodCallCore(TypeChecker.java:711) at javassist.compiler.TypeChecker.atCallExpr(TypeChecker.java:688) at javassist.compiler.JvstTypeChecker.atCallExpr(JvstTypeChecker.java:157) at javassist.compiler.ast.CallExpr.accept(CallExpr.java:46) at javassist.compiler.CodeGen.doTypeCheck(CodeGen.java:242) at javassist.compiler.CodeGen.atStmnt(CodeGen.java:330) at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50) at javassist.compiler.CodeGen.atStmnt(CodeGen.java:351) at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50) at javassist.compiler.CodeGen.atIfStmnt(CodeGen.java:391) at javassist.compiler.CodeGen.atStmnt(CodeGen.java:355) at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50) at javassist.compiler.CodeGen.atStmnt(CodeGen.java:351) at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50) at javassist.compiler.MemberCodeGen.atTryStmnt(MemberCodeGen.java:204) at javassist.compiler.CodeGen.atStmnt(CodeGen.java:367) at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50) at javassist.compiler.CodeGen.atStmnt(CodeGen.java:351) at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50) at javassist.compiler.CodeGen.atMethodBody(CodeGen.java:292) at javassist.compiler.CodeGen.atMethodDecl(CodeGen.java:274) at javassist.compiler.ast.MethodDecl.accept(MethodDecl.java:44) at javassist.compiler.Javac.compileMethod(Javac.java:169) at javassist.compiler.Javac.compile(Javac.java:95) at javassist.CtNewMethod.make(CtNewMethod.java:74) at javassist.CtNewMethod.make(CtNewMethod.java:45) at com.alibaba.dubbo.common.bytecode.ClassGenerator.toClass(ClassGenerator.java:318) at com.alibaba.dubbo.common.bytecode.Wrapper.makeWrapper(Wrapper.java:346) at com.alibaba.dubbo.common.bytecode.Wrapper.getWrapper(Wrapper.java:89) at com.alibaba.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:426) at com.alibaba.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:281) at com.alibaba.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:242) at com.alibaba.dubbo.config.ServiceConfig.export(ServiceConfig.java:143) at com.alibaba.dubbo.config.spring.ServiceBean.onApplicationEvent(ServiceBean.java:109) at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:96) at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:334) at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:948) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:389) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:294) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5016) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5528) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745)Caused by: java.io.IOException: invalid constant type: 18 at javassist.bytecode.ConstPool.readOne(ConstPool.java:1113) at javassist.bytecode.ConstPool.read(ConstPool.java:1056) at javassist.bytecode.ConstPool.<init>(ConstPool.java:150) at javassist.bytecode.ClassFile.read(ClassFile.java:765) at javassist.bytecode.ClassFile.<init>(ClassFile.java:109) at javassist.CtClassType.getClassFile2(CtClassType.java:191)... 55 more

网上查了下解决方案，我在这里笔记一下

问题分析

1. 根据异常日志中dubbo调用javassist编译字节码出错，定位javassist版本问题；

2. 由于同样的dubbo项目在jdk6下没有问题，当前项目使用的jdk8，所以应该是jdk8和javassist冲突；

3. 将dubbo引入的javassist-3.15.0-GA去掉，引入更高版本直到javassist-3.18.0-GA项目可以正常启动。

解决步骤

1.把repository下的javassist3.18.1包删除
2.项目pom文件增加包

maven中需要增加的包：

   <dependency>            <groupId>com.alibaba</groupId>            <artifactId>dubbo</artifactId>            <version>2.8.4</version>            <exclusions>                <exclusion>                    <artifactId>spring</artifactId>                    <groupId>org.springframework</groupId>                </exclusion>            </exclusions>        </dependency>    <dependency>            <groupId>org.javassist</groupId>            <artifactId>javassist</artifactId>            <version>3.20.0-GA</version>   </dependency>