转角遇异常系列-javax.validation.ValidationException: HV000183: Unable to initialize 'javax.el.ExpressionFac

尝试构建一个dubbo消费端时，启动报错：

javax.validation.ValidationException: HV000183: Unable to initialize 'javax.el.ExpressionFactory'. Check that you have the EL dependencies on the classpath, or use ParameterMessageInterpolator instead

    at org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator.buildExpressionFactory(ResourceBundleMessageInterpolator.java:102)
    at org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator.(ResourceBundleMessageInterpolator.java:45)
    at org.hibernate.validator.internal.engine.ConfigurationImpl.getDefaultMessageInterpolator(ConfigurationImpl.java:423)
    at org.hibernate.validator.internal.engine.ConfigurationImpl.getDefaultMessageInterpolatorConfiguredWithClassLoader(ConfigurationImpl.java:575)
    at org.hibernate.validator.internal.engine.ConfigurationImpl.getMessageInterpolator(ConfigurationImpl.java:364)
    at org.hibernate.validator.internal.engine.ValidatorFactoryImpl.(ValidatorFactoryImpl.java:148)
    at org.hibernate.validator.HibernateValidator.buildValidatorFactory(HibernateValidator.java:38)
    at org.hibernate.validator.internal.engine.ConfigurationImpl.buildValidatorFactory(ConfigurationImpl.java:331)
    at javax.validation.Validation.buildDefaultValidatorFactory(Validation.java:103)
    at org.apache.dubbo.validation.support.jvalidation.JValidator.(JValidator.java:94)
    at org.apache.dubbo.validation.support.jvalidation.JValidation.createValidator(JValidation.java:37)
    at org.apache.dubbo.validation.support.AbstractValidation.getValidator(AbstractValidation.java:43)
    at org.apache.dubbo.validation.Validation$Adaptive.getValidator(Validation$Adaptive.java)
    at org.apache.dubbo.validation.filter.ValidationFilter.invoke(ValidationFilter.java:83)
    at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:73)
    at org.apache.dubbo.rpc.filter.ExceptionFilter.invoke(ExceptionFilter.java:63)
    at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:73)
    at org.apache.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:88)
    at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:73)
    at org.apache.dubbo.rpc.filter.TimeoutFilter.invoke(TimeoutFilter.java:54)
    at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:73)
    at org.apache.dubbo.rpc.protocol.dubbo.filter.TraceFilter.invoke(TraceFilter.java:80)
    at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:73)
    at org.apache.dubbo.rpc.filter.ContextFilter.invoke(ContextFilter.java:79)
    at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:73)
    at org.apache.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:137)
    at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:73)
    at org.apache.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:38)
    at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:73)
    at org.apache.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java:39)
    at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:73)
    at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol$1.reply(DubboProtocol.java:128)
    at org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleRequest(HeaderExchangeHandler.java:103)
    at org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:200)
    at org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:51)
    at org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:57)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NoClassDefFoundError: javax/el/ExpressionFactory
    at org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator.buildExpressionFactory(ResourceBundleMessageInterpolator.java:98)
    ... 38 more

原pom文件：

    4.0.0
    
        org.springframework.boot
        spring-boot-starter-parent
        2.1.6.RELEASE
         
    
    com.example
    dubbo-consume
    0.0.1-SNAPSHOT
    dubbo-consume
    Demo project for Spring Boot

    
        1.8
        2.1.6.RELEASE
        2.7.1
    

    
        
            
            
                org.springframework.boot
                spring-boot-dependencies
                ${spring-boot.version}
                pom
                import
            

            
            
                org.apache.dubbo
                dubbo-dependencies-bom
                ${dubbo.version}
                pom
                import
            

            
                org.apache.dubbo
                dubbo
                ${dubbo.version}
                
                    
                        org.springframework
                        spring
                    
                    
                        javax.servlet
                        servlet-api
                    
                    
                        log4j
                        log4j
                    
                
            
        
    

    
        
        
            org.apache.dubbo
            dubbo-spring-boot-starter
            2.7.1
        

        
            org.apache.dubbo
            dubbo
        

        
            org.springframework.boot
            spring-boot-autoconfigure
            2.1.6.RELEASE
        

        
            org.springframework.boot
            spring-boot-starter-test
        

        
            org.springframework.boot
            spring-boot-starter-tomcat
        

        
            com.example
            dubbo-interface
            1.0-SNAPSHOT
        

        
        
            org.apache.dubbo
            dubbo-dependencies-zookeeper
            ${dubbo.version}
            pom
        

    

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    

    
        
            apache.snapshots.https
            Apache Development Snapshot Repository
            https://repository.apache.org/content/repositories/snapshots
            
                false
            
            
                true
            
        
    

 

原因分析：

可以通过mvn依赖树来分析 这个类所在包的引用

命令：mvn dependency:tree

找到这个类并定位到包 得知 是由org.apache.tomcat.embed 引进来的

而embed这个包是由 spring-boot-starter-tomcat引进来的

查看之前没有问题的工程 starter-tomcat是由starter-web包引进来的 版本号(2.0.3-RELEASE)与新工程版本(2.1.6)不一致

于是将pom文件修改 引进2.0.3的包，结果还是报异常。。

最终解决方案：

pom文件新增

    org.springframework.boot
    spring-boot-starter-tomcat



    com.example
    dubbo-interface
    1.2-SNAPSHOT
    
        
            org.hibernate
            hibernate-validator
        
    



    org.hibernate
    hibernate-validator
    5.1.1.Final