Question

任何人都可以在解决maven应用程序方面遇到困难。我正在使用spring boot应用程序连接到cassandra。每当我们做一个mvn clean包-DskipTests = true时，我们会收到以下警告： -

并且在运行应用程序失败时（java -jar target / DemoSearch-0.0.1-SNAPSHOT.jar）并附加了堆栈跟踪。

> Unsatisfied dependency expressed through constructor parameter 2;
> nested exception is 
> org.springframework.beans.factory.BeanCreationException: Error
> creating bean with name 'cassandraCluster' defined in class path
> resource [org/springframework/boot/autoc
> onfigure/cassandra/CassandraAutoConfiguration.class]: Bean
> instantiation via factory method failed; nested exception is
> org.springframework.beans.BeanInstantiationExcept ion: Failed to
> instantiate [com.datastax.driver.core.Cluster]: Factory method
> 'cassandraCluster' threw exception; nested exception is
> java.lang.NoClassDefFoundError: io/ netty/util/Timer
>         at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0 .2.RELEASE]
>         at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:579)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5 .0.2.RELEASE]
>         ... 40 common frames omitted Caused by: org.springframework.beans.factory.BeanCreationException: Error
> creating bean with name 'persistentEntities' defined in class path
> resource [org/springframewor
> k/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]: Bean
> instantiation via factory method failed; nested exception is
> org.springframework.beans.BeanInstanti ationException: Failed to
> instantiate
> [org.springframework.data.mapping.context.PersistentEntities]: Factory
> method 'persistentEntities' threw exception; nested exceptio n is
> org.springframework.beans.factory.UnsatisfiedDependencyException:
> Error creating bean with name
> 'org.springframework.boot.autoconfigure.data.cassandra.CassandraData
> AutoConfiguration': Unsatisfied dependency expressed through
> constructor parameter 2; nested exception is
> org.springframework.beans.factory.BeanCreationException: Error
> creating bean with name 'cassandraCluster' defined in class path
> resource
> [org/springframework/boot/autoconfigure/cassandra/CassandraAutoConfiguration.class]:
> Bean insta ntiation via factory method failed; nested exception is
> org.springframework.beans.BeanInstantiationException: Failed to
> instantiate [com.datastax.driver.core.Cluster]: F actory method
> 'cassandraCluster' threw exception; nested exception is
> java.lang.NoClassDefFoundError: io/netty/util/Timer
>         at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:587)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5 .0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1250)
> ~[spr ing-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1099)
> ~[spring-beans-5 .0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
> ~[spring-beans-5.0.2.RE LEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502)
> ~[spring-beans-5.0.2.RELE ASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEAS E]
>         at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
> ~[spring-beans-5.0.2.RELEASE.jar!/:
> 5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.resolveBeanReference(ConfigurationClassEnhancer.java:392)
> ~[spring-con text-5.0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:364)
> ~[spring-context-5.0.2. RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$4669ff6b.persistentEntities(<generated>)
> ~[spring-data-rest
> -webmvc-3.0.2.RELEASE.jar!/:3.0.2.RELEASE]
>         at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration.jsonSchemaConverter(RepositoryRestMvcConfiguration.java:426)
> ~[spring-data-rest-web mvc-3.0.2.RELEASE.jar!/:3.0.2.RELEASE]
>         at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$4669ff6b.CGLIB$jsonSchemaConverter$26(<generated>)
> ~[spring
> -data-rest-webmvc-3.0.2.RELEASE.jar!/:3.0.2.RELEASE]
>         at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$4669ff6b$$FastClassBySpringCGLIB$$553cc2af.invoke(<generate
> d>) ~[spring-data-rest-webmvc-3.0.2.RELEASE.jar!/:3.0.2.RELEASE]
>         at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
> ~[spring-core-5.0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:361)
> ~[spring-context-5.0.2. RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$4669ff6b.jsonSchemaConverter(<generated>)
> ~[spring-data-res t-webmvc-3.0.2.RELEASE.jar!/:3.0.2.RELEASE]
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_101]
>         at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_101]
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_101]
>         at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_101]
>         at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0 .2.RELEASE]
>         ... 41 common frames omitted Caused by: org.springframework.beans.BeanInstantiationException: Failed to
> instantiate
> [org.springframework.data.mapping.context.PersistentEntities]: Factory
> method 'per sistentEntities' threw exception; nested exception is
> org.springframework.beans.factory.UnsatisfiedDependencyException:
> Error creating bean with name 'org.springframewor
> k.boot.autoconfigure.data.cassandra.CassandraDataAutoConfiguration':
> Unsatisfied dependency expressed through constructor parameter 2;
> nested exception is org.springfram
> ework.beans.factory.BeanCreationException: Error creating bean with
> name 'cassandraCluster' defined in class path resource
> [org/springframework/boot/autoconfigure/cassan
> dra/CassandraAutoConfiguration.class]: Bean instantiation via factory
> method failed; nested exception is
> org.springframework.beans.BeanInstantiationException: Failed to
> instantiate [com.datastax.driver.core.Cluster]: Factory method
> 'cassandraCluster' threw exception; nested exception is
> java.lang.NoClassDefFoundError: io/netty/util/Time r
>         at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0 .2.RELEASE]
>         at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:579)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5 .0.2.RELEASE]
>         ... 63 common frames omitted Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException:
> Error creating bean with name
> 'org.springframework.boot.autoconfigure.data.cassandra.Cassand
> raDataAutoConfiguration': Unsatisfied dependency expressed through
> constructor parameter 2; nested exception is
> org.springframework.beans.factory.BeanCreationException: Error
> creating bean with name 'cassandraCluster' defined in class path
> resource
> [org/springframework/boot/autoconfigure/cassandra/CassandraAutoConfiguration.class]:
> Bean  instantiation via factory method failed; nested exception is
> org.springframework.beans.BeanInstantiationException: Failed to
> instantiate [com.datastax.driver.core.Clust er]: Factory method
> 'cassandraCluster' threw exception; nested exception is
> java.lang.NoClassDefFoundError: io/netty/util/Timer
>         at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:729)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEA SE]
>         at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:192)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEA SE]
>         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1270)
> ~[spring-beans-
> 5.0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1127)
> ~[spring-beans-5 .0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
> ~[spring-beans-5.0.2.RE LEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502)
> ~[spring-beans-5.0.2.RELE ASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEAS E]
>         at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
> ~[spring-beans-5.0.2.RELEASE.jar!/:
> 5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:368)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5 .0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1250)
> ~[spr ing-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1099)
> ~[spring-beans-5 .0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
> ~[spring-beans-5.0.2.RE LEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502)
> ~[spring-beans-5.0.2.RELE ASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEAS E]
>         at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
> ~[spring-beans-5.0.2.RELEASE.jar!/:
> 5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:516)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.
> 0.2.RELEASE]
>         at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:504)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.
> 0.2.RELEASE]
>         at org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java:1194)
> ~[spring-context-5.0.2.RELEASE.jar!/:5.0.2 .RELEASE]
>         at org.springframework.beans.factory.BeanFactoryUtils.beansOfTypeIncludingAncestors(BeanFactoryUtils.java:263)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration.persistentEntities(RepositoryRestMvcConfiguration.java:236)
> ~[spring-data-rest-webm vc-3.0.2.RELEASE.jar!/:3.0.2.RELEASE]
>         at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$4669ff6b.CGLIB$persistentEntities$19(<generated>)
> ~[spring- data-rest-webmvc-3.0.2.RELEASE.jar!/:3.0.2.RELEASE]
>         at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$4669ff6b$$FastClassBySpringCGLIB$$553cc2af.invoke(<generate
> d>) ~[spring-data-rest-webmvc-3.0.2.RELEASE.jar!/:3.0.2.RELEASE]
>         at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
> ~[spring-core-5.0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:361)
> ~[spring-context-5.0.2. RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$4669ff6b.persistentEntities(<generated>)
> ~[spring-data-rest
> -webmvc-3.0.2.RELEASE.jar!/:3.0.2.RELEASE]
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_101]
>         at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_101]
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_101]
>         at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_101]
>         at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0 .2.RELEASE]
>         ... 64 common frames omitted Caused by: org.springframework.beans.factory.BeanCreationException: Error
> creating bean with name 'cassandraCluster' defined in class path
> resource [org/springframework/
> boot/autoconfigure/cassandra/CassandraAutoConfiguration.class]: Bean
> instantiation via factory method failed; nested exception is
> org.springframework.beans.BeanInstantia tionException: Failed to
> instantiate [com.datastax.driver.core.Cluster]: Factory method
> 'cassandraCluster' threw exception; nested exception is
> java.lang.NoClassDefFound Error: io/netty/util/Timer
>         at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:587)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5 .0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1250)
> ~[spr ing-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1099)
> ~[spring-beans-5 .0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
> ~[spring-beans-5.0.2.RE LEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502)
> ~[spring-beans-5.0.2.RELE ASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEAS E]
>         at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
> ~[spring-beans-5.0.2.RELEASE.jar!/:
> 5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:251)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEASE ]
>         at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1135)
> ~[spring-beans-5.0.2.RELEASE.ja r!/:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1062)
> ~[spring-beans-5.0.2.RELEASE.jar! /:5.0.2.RELEASE]
>         at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:815)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2. RELEASE]
>         at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:721)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0.2.RELEA SE]
>         ... 97 common frames omitted Caused by: org.springframework.beans.BeanInstantiationException: Failed to
> instantiate [com.datastax.driver.core.Cluster]: Factory method
> 'cassandraCluster' threw except ion; nested exception is
> java.lang.NoClassDefFoundError: io/netty/util/Timer
>         at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0 .2.RELEASE]
>         at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:579)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5 .0.2.RELEASE]
>         ... 110 common frames omitted Caused by: java.lang.NoClassDefFoundError: io/netty/util/Timer
>         at com.datastax.driver.core.Configuration$Builder.build(Configuration.java:317)
> ~[cassandra-driver-core-3.3.2.jar!/:na]
>         at com.datastax.driver.core.Cluster$Builder.getConfiguration(Cluster.java:1318)
> ~[cassandra-driver-core-3.3.2.jar!/:na]
>         at com.datastax.driver.core.Cluster.<init>(Cluster.java:113) ~[cassandra-driver-core-3.3.2.jar!/:na]
>         at com.datastax.driver.core.Cluster.buildFrom(Cluster.java:178)
> ~[cassandra-driver-core-3.3.2.jar!/:na]
>         at com.datastax.driver.core.Cluster$Builder.build(Cluster.java:1335)
> ~[cassandra-driver-core-3.3.2.jar!/:na]
>         at org.springframework.boot.autoconfigure.cassandra.CassandraAutoConfiguration.cassandraCluster(CassandraAutoConfiguration.java:86)
> ~[spring-boot-autoconfigure-2
> .0.0.BUILD-SNAPSHOT.jar!/:2.0.0.BUILD-SNAPSHOT]
>         at org.springframework.boot.autoconfigure.cassandra.CassandraAutoConfiguration$$EnhancerBySpringCGLIB$$26c07881.CGLIB$cassandraCluster$0(<generated>)
> ~[spring-bo
> ot-autoconfigure-2.0.0.BUILD-SNAPSHOT.jar!/:2.0.0.BUILD-SNAPSHOT]
>         at org.springframework.boot.autoconfigure.cassandra.CassandraAutoConfiguration$$EnhancerBySpringCGLIB$$26c07881$$FastClassBySpringCGLIB$$f566d5b3.invoke(<generat
> ed>)
> ~[spring-boot-autoconfigure-2.0.0.BUILD-SNAPSHOT.jar!/:2.0.0.BUILD-SNAPSHOT]
>         at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
> ~[spring-core-5.0.2.RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:361)
> ~[spring-context-5.0.2. RELEASE.jar!/:5.0.2.RELEASE]
>         at org.springframework.boot.autoconfigure.cassandra.CassandraAutoConfiguration$$EnhancerBySpringCGLIB$$26c07881.cassandraCluster(<generated>)
> ~[spring-boot-autoc
> onfigure-2.0.0.BUILD-SNAPSHOT.jar!/:2.0.0.BUILD-SNAPSHOT]
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_101]
>         at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_101]
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_101]
>         at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_101]
>         at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
> ~[spring-beans-5.0.2.RELEASE.jar!/:5.0 .2.RELEASE]
>         ... 111 common frames omitted Caused by: java.lang.ClassNotFoundException: io.netty.util.Timer
>         at java.net.URLClassLoader.findClass(Unknown Source) ~[na:1.8.0_101]
>         at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_101]
>         at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:93)
> ~[DemoSearch-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT]
>         at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_101]
>         ... 127 common frames omitted

Answer 1

以下是pom.xml： -

   <?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.demo.search</groupId>
    <artifactId>DemoSearch</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>DemoSearch</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.0.BUILD-SNAPSHOT</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-cassandra</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-rest</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-solr</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jersey</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
         <!-- <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.6</version>
        </dependency> -->
    <!-- https://mvnrepository.com/artifact/io.netty/netty-all -->
<!-- <dependency>
    <groupId>io.netty</groupId>
    <artifactId>netty-all</artifactId>
    <version>4.0.9.Final</version>
</dependency>-->
<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>16.0.1</version>
</dependency>

</dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

     <repositories>
        <!-- <repository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository> -->
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
        <repository>
        <id>spring-snapshots</id>
        <name>Spring Snapshots</name>
        <url>https://repo.spring.io/libs-snapshot</url>
        <snapshots>
            <enabled>true</enabled>
        </snapshots>
    </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </pluginRepository>
        <pluginRepository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>
</project>

Answer 2

您收到transitive dependency警告，因为您要添加的netty-all jar版本与Spring启动添加的jar版本不同。如果从依赖项中删除版本号，则不会收到该警告。我没有你的Cassandra相关文件和你的Spring启动文件所以我无法看到我是否收到ClassNotFoundException。但是我使用了NetUtil包中的另一个类io.netty.util，我可以加载该类而没有任何错误。

maven构建问题与io.netty：netty-handler：jar：4.1.17.Final

2 个答案: