我将我的项目更新为spring-boot Version 2.1.0.RELEASE。 现在我收到以下错误：
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.cassandra.ReactiveSession]: Factory method 'reactiveSession' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'session' defined in class path resource [ch/sbb/kat/fc/config/CassandraConfig.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: com/codahale/metrics/JmxReporter
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185)
at org.springframework.beans.factory.support.ConstructorResolver.lambda$instantiate$2(ConstructorResolver.java:615)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:614)
... 120 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'session' defined in class path resource [ch/sbb/kat/fc/config/CassandraConfig.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: com/codahale/metrics/JmxReporter
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1745)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:576)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:339)
at ch.sbb.kat.fc.config.CassandraConfig$$EnhancerBySpringCGLIB$$a22674d7.session(<generated>)
at org.springframework.data.cassandra.config.AbstractCassandraConfiguration.getRequiredSession(AbstractCassandraConfiguration.java:66)
at org.springframework.data.cassandra.config.AbstractReactiveCassandraConfiguration.reactiveSession(AbstractReactiveCassandraConfiguration.java:47)
at ch.sbb.kat.fc.config.CassandraConfig$$EnhancerBySpringCGLIB$$a22674d7.CGLIB$reactiveSession$7(<generated>)
at ch.sbb.kat.fc.config.CassandraConfig$$EnhancerBySpringCGLIB$$a22674d7$$FastClassBySpringCGLIB$$7973a63.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363)
at ch.sbb.kat.fc.config.CassandraConfig$$EnhancerBySpringCGLIB$$a22674d7.reactiveSession(<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.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
... 123 more
Caused by: java.lang.NoClassDefFoundError: com/codahale/metrics/JmxReporter
at com.datastax.driver.core.Metrics.<init>(Metrics.java:146)
at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1501)
at com.datastax.driver.core.Cluster.init(Cluster.java:208)
at com.datastax.driver.core.Cluster.connectAsync(Cluster.java:376)
at com.datastax.driver.core.Cluster.connect(Cluster.java:332)
at org.springframework.data.cassandra.config.CassandraCqlSessionFactoryBean.connect(CassandraCqlSessionFactoryBean.java:89)
at org.springframework.data.cassandra.config.CassandraCqlSessionFactoryBean.afterPropertiesSet(CassandraCqlSessionFactoryBean.java:82)
at org.springframework.data.cassandra.config.CassandraSessionFactoryBean.afterPropertiesSet(CassandraSessionFactoryBean.java:59)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.lambda$invokeInitMethods$5(AbstractAutowireCapableBeanFactory.java:1795)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1794)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1741)
... 143 more
Caused by: java.lang.ClassNotFoundException: com.codahale.metrics.JmxReporter
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 155 more
使用本期中介绍的属性https://github.com/spring-projects/spring-boot/issues/14778似乎对解决我的问题没有任何影响。
如何为cassandra禁用jmx？
我目前的cassandra配置如下所示：
@Configuration
@EnableReactiveCassandraRepositories({"repository"})
public class CassandraConfig extends AbstractReactiveCassandraConfiguration {
@Value("${cassandra.host}")
private String host;
@Override
protected String getKeyspaceName() {
return "keyspace";
}
@Override
public String[] getEntityBasePackages() {
return new String[]{"model"};
}
@Override
public SchemaAction getSchemaAction() {
return SchemaAction.CREATE_IF_NOT_EXISTS;
}
@Override
public String getContactPoints() {
return host;
}
}
当Spring Boot自动配置Cassandra spring.data.cassandra.jmx-enabled bean时，使用Cluster属性。通过扩展AbstractReactiveCassandraConfiguration，您将关闭此自动配置，转而使用由Cluster创建的AbstractClusterConfiguration bean，这是一种超级AbstractReactiveCassandraConfiguration。因此，该物业无效。
有两种方法可以解决您的问题：
AbstractReactiveCassandraConfiguration子类，并使用各种spring.data.cassandra.*属性来配置。cluster的AbstractClusterConfiguration上的CassandraConfig，调用super.cluster()获取CassandraClusterFactoryBean，然后在返回工厂bean之前调用setJmxReportingEnabled(false)。或者，如果您未在应用程序的其他位置使用Dropwizard，则可以通过覆盖dropwizard-metrics.version或pom.xml中的build.gradle属性，降级到与Cassandra的JMX报告兼容的旧版本。
而不是像安迪威尔金森所提到的那样覆盖cluster，你可以选择覆盖getMetricsEnabled，以便始终返回false。
@Override
protected boolean getMetricsEnabled() { return false; }
我在这里尝试了答案，我不知道如何但错误仍然存在。我从docs.datastax.com 读到这篇文章，在那里他们谈到将JMX reporting中的Metrics 4移动到一个单独的模块metrics-jmx。他们明确表示可能会导致问题/错误。
要解决这个问题，我只需要将此方法称为.withoutJMXReporting()，如下所示。
Cluster cluster = Cluster.builder()
.withoutJMXReporting()
.build();
你可以安静地跟随here
包括旧版本的库也修复了问题：
implementation("io.dropwizard.metrics:metrics-core:3.2.2")