問題說明
Spring Boot 2.2.3 修復了 Spring Boot 2.2的大量問題,當升級至 2.2.3 以後,直接翻車 pigx-gateway 網關應用直接啟動不起來。
翻車日誌
<code>***************************
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
/<code>
問題排查
如上日誌涉及到 reactor-netty 依賴版本的問題
<code> +---------------------------+ +---------------------------+
| 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 |
+----------------+ +----------------+/<code>
ConnectionProvider
0.9.3 未對以下版本兼容,去掉ConnectionProvider.elastic(Ljava/lang/String;Ljava/time/Duration;) ,多態出來 一個 maxLifeTime 的參數, 具體參考
https://github.com/reactor/reactor-netty/issues/922
https://github.com/reactor/reactor-netty/issues/924
<code> /**
* Create a {@link ConnectionProvider} to cache and grow on demand {@link Connection}.
*An elastic {@link ConnectionProvider} will never wait before opening a new
/<code>
* 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) {
...
}
解決方法
- 全局使用 0.9.4 暫時是 快照版本,或者降級到 0.9.2 ,Spring Boot 2.2.3 未修改reactor 問題,降級是目前最好的選擇。
<code><dependencymanagement>
<dependencies>
<dependency>
<groupid>io.projectreactor.netty/<groupid>
<artifactid>reactor-netty/<artifactid>
<version>0.9.2.RELEASE/<version>
/<dependency>
/<dependencies>
/<dependencymanagement>/<code>
閱讀更多 Java微服務 的文章