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.ContextLoaderListener
java.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>