springCloud集成gateway启动报错

原因是因为springboot 是2.2.3版本 

 

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。

*************************** 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.class It 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.jar Action: Correct the classpath of your application so that it contains a single, compatible version of reactor.netty.resources.ConnectionProvider

日志排查 发现

+---------------------------+ +---------------------------+ | 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

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>

转自 解决方法 ：https://www.imooc.com/article/299978?block_id=tuijian_wz 作者：晓晓的冷冷 链接：https://www.imooc.com/article/299978?block_id=tuijian_wz 来源：慕课网