翻车！Spring Boot 2.2.3 不兼容 Spring Cloud Hoxton.SR1

Posted 2021-04-28 JAVA架构日记

问题说明

Spring Boot 2.2.3 修复了 Spring Boot 2.2的大量问题，当升级至 2.2.3 以后，直接翻车 pigx-gateway 网关应用直接启动不起来。

翻车日志

***************************APPLICATION FAILED TO START***************************Description:
An attempt was made to call a method that does not exist. The attempt was made from the following location:    org.springframework.cloud.gateway.config.GatewayAutoConfiguration$NettyConfiguration.gatewayHttpClient(GatewayAutoConfiguration.java:597)The following method did not exist:    reactor.netty.resources.ConnectionProvider.elastic(Ljava/lang/String;Ljava/time/Duration;)Lreactor/netty/resources/ConnectionProvider;The method's class, reactor.netty.resources.ConnectionProvider, is available from the following locations:    jar:file:/Users/lengleng/env/repository/io/projectreactor/netty/reactor-netty/0.9.3.RELEASE/reactor-netty-0.9.3.RELEASE.jar!/reactor/netty/resources/ConnectionProvider.classIt was loaded from the following location:    file:/Users/lengleng/env/repository/io/projectreactor/netty/reactor-netty/0.9.3.RELEASE/reactor-netty-0.9.3.RELEASE.jarAction:Correct the classpath of your application so that it contains a single, compatible version of reactor.netty.resources.ConnectionProvider

问题排查

如上日志涉及到 reactor-netty 依赖版本的问题

 +---------------------------+ +---------------------------+ | Spring Boot 2.2.3.RELEASE | | Spring Boot 2.2.2.RELEASE | +-------------+-------------+ +-------------+-------------+ | |+-----------------v----------------+ +-----------------v----------------+|spring-boot-starter-reactor-netty | |spring-boot-starter-reactor-netty || 2.2.3.RELEASE | | 2.2.2.RELEASE |+-----------------+----------------+ +-----------------+----------------+ | | +-------+--------+ +-------+--------+ | reactor-netty | | reactor-netty | | 0.9.3.RELEASE | | 0.9.2.RELEASE | +----------------+ +----------------+

ConnectionProvider

0.9.3 未对以下版本兼容，去掉ConnectionProvider.elastic(Ljava/lang/String;Ljava/time/Duration;) ，多态出来 一个 maxLifeTime 的参数， 具体参考 reactor/reactor-netty#922 . reactor/reactor-netty#924

 /** * Create a {@link ConnectionProvider} to cache and grow on demand {@link Connection}. * <p>An elastic {@link ConnectionProvider} will never wait before opening a new * connection. The reuse window is limited but it cannot starve an undetermined volume * of clients using it. * * @param name the channel pool map name * @param maxIdleTime the {@link Duration} after which the channel will be closed when idle (resolution: ms), * if {@code NULL} there is no max idle time * @param maxLifeTime the {@link Duration} after which the channel will be closed (resolution: ms), * if {@code NULL} there is no max life time * * @return a new {@link ConnectionProvider} to cache and grow on demand * {@link Connection} */ static ConnectionProvider elastic(String name, @Nullable Duration maxIdleTime, @Nullable Duration maxLifeTime) { ... }

解决方法

• 全局使用 0.9.4 暂时是 快照版本，或者降级到 0.9.2 ，Spring Boot 2.2.3 未修改reactor 问题，降级是目前最好的选择。

<dependencyManagement> <dependencies> <dependency> <groupId>io.projectreactor.netty</groupId> <artifactId>reactor-netty</artifactId> <version>0.9.2.RELEASE</version> </dependency> </dependencies> </dependencyManagement>