reactor/netty/resources/ConnectionProvider.fixed(Ljava/lang/String;IJLjava/time/Duration;)Lreactor/netty/resources/ConnectionProvider;答案

【问题标题】：reactor/netty/resources/ConnectionProvider.fixed(Ljava/lang/String;IJLjava/time/Duration;)Lreactor/netty/resources/ConnectionProvider;reactor/netty/resources/ConnectionProvider.fixed(Ljava/lang/String;IJLjava/time/Duration;)Lreactor/netty/resources/ConnectionProvider;
【发布时间】：2021-03-18 21:20:30
【问题描述】：

使用 Azure cosmos DB 启动 Spring Boot 应用程序失败

说明：

试图调用一个不存在的方法。尝试是从以下位置进行的：

com.azure.cosmos.implementation.http.HttpClient.createFixed(HttpClient.java:56)

以下方法不存在：

reactor.netty.resources.ConnectionProvider.fixed(Ljava/lang/String;IJLjava/time/Duration;)Lreactor/netty/resources/ConnectionProvider;

该方法的类 reactor.netty.resources.ConnectionProvider 可从以下位置获得：

jar:file:/Users/vishnuvuyyur/.m2/repository/io/projectreactor/netty/reactor-netty-core/1.0.1/reactor-netty-core-1.0.1.jar!/reactor/netty/resources/ConnectionProvider.class

类层次结构是从以下位置加载的：

reactor.netty.resources.ConnectionProvider: file:/Users/vishnuvuyyur/.m2/repository/io/projectreactor/netty/reactor-netty-core/1.0.1/reactor-netty-core-1.0.1.jar

【问题讨论】：

标签： spring-boot azure-cosmosdb reactor-netty

【解决方案1】：

更改 Spring Boot 版本对我有用

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.3.4.RELEASE</version>
    <relativePath/> 
</parent>

【讨论】：

我不喜欢它，但它有效。

【解决方案2】：

我已经使用 java 11 解决了，我从 intellij 创建了 webflux 用于响应式微服务。

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.4.5</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.api.bank.salesforce</groupId>
<artifactId>sbs</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>sbs</name>
<description>Demo project for Spring Boot</description>
<properties>
    <java.version>11</java.version>
</properties>
<dependencies>
    <dependency>
        <groupId>com.microsoft.azure</groupId>
        <artifactId>spring-data-cosmosdb</artifactId>
        <version>2.3.0</version>
    </dependency>
    <dependency>
        <groupId>com.azure</groupId>
        <artifactId>azure-core</artifactId>
        <version>1.10.0</version>
    </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>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
    </dependency>
    <dependency>
        <groupId>io.swagger</groupId>
        <artifactId>swagger-annotations</artifactId>
        <version>1.5.21</version>
    </dependency>
    <dependency>
        <groupId>io.swagger</groupId>
        <artifactId>swagger-models</artifactId>
        <version>1.6.0</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-annotations</artifactId>
        <version>2.10.3</version>
    </dependency>
    <dependency>
        <groupId>javax.validation</groupId>
        <artifactId>validation-api</artifactId>
    </dependency>
    <dependency>
        <groupId>org.threeten</groupId>
        <artifactId>threetenbp</artifactId>
        <version>1.5.0</version>
    </dependency>
</dependencies>

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

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
        <plugin>
            <groupId>io.swagger.codegen.v3</groupId>
            <artifactId>swagger-codegen-maven-plugin</artifactId>
            <version>3.0.18</version>
            <executions>
                <execution>
                    <goals>
                        <goal>generate</goal>
                    </goals>
                    <configuration>
                        <inputSpec>${project.basedir}/src/main/resources/library-api.yaml</inputSpec>
                        <language>spring</language>
                        <output>${project.build.directory}/generated-sources/</output>
                        <generateSupportingFiles>false</generateSupportingFiles>
                        <apiPackage>com.api.bank.salesforce.sbs.api</apiPackage>
                        <modelPackage>com.api.bank.salesforce.sbs.models</modelPackage>
                        <configOptions>
                            <interfaceOnly>true</interfaceOnly>
                        </configOptions>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

【讨论】：

【解决方案3】：

错误原因：

如日志中所述：com.azure.cosmos.implementation.http.HttpClient.createFixed(HttpClient.java:56)
azure cosmos 库没有更新最新的 spring boot 版本

可以使用 spring-boot 2.4.0 和 azure cosmos db 3.0.0-beta.1 重现当前问题

<groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.3.3.RELEASE</version>

 <dependency>
      <groupId>com.microsoft.azure</groupId>
      <artifactId>azure-cosmosdb-spring-boot-starter</artifactId>
  <version>3.0.0-beta.1</version>

修复，将 spiring boot 版本降低到 2.3.5，因为 azure db 版本 3.0.0-beta.1 不支持 spring 2.4.0

【讨论】：