Upgrading to Spring Cloud 2020.0.0: SchemaRegistryClientConfiguration required a bean of type 'org.springframework.boot.web.client.RestTemplateBuilder' that could not be found

[davidmelia]

Hi,

I have upgraded to Spring Boot 2.4.1 and Spring Cloud 2020.0.0 and get the following error
Parameter 1 of method schemaRegistryClient in org.springframework.cloud.schema.registry.client.config.SchemaRegistryClientConfiguration required a bean of type 'org.springframework.boot.web.client.RestTemplateBuilder' that could not be found.

This is easy to simulate using a spring starter project with WebFlux and schema registry

<?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>2.4.1</version>
<!-- 		<version>2.3.7.RELEASE</version> -->
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.melia</groupId>
	<artifactId>schema_reg_issue</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>schema_reg_issue</name>
	<description>Demo project for Spring Boot</description>

	<properties>
		<java.version>11</java.version>
<!-- 		<spring-cloud.version>Hoxton.SR7</spring-cloud.version> -->
		<spring-cloud.version>2020.0.0</spring-cloud.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-webflux</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-schema-registry-client</artifactId>
		</dependency>	
	</dependencies>

	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>${spring-cloud.version}</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

	<repositories>
		<repository>
			<id>spring-milestones</id>
			<name>Spring Milestones</name>
			<url>https://repo.spring.io/milestone</url>
		</repository>
	</repositories>

</project>

Thanks

[ninadphalak]

What's the fix for this issue? Is it present in earlier versions?
I am facing this issue and my app fails to run any tests with this error. I am using MockMvc with @SpringBootTest for my test, and it isn't even related to the Schema Client registry, but just because my main class is annotated with @EnableSchemaRegistryClient I get this error

[snv]

Stumbled over this same old problem too.
I also have a service which is using Webflux, which apparently disables the autoconfiguration of the RestTemplateBuilder.

It would be nice if Spring Cloud Schema Registry would just switch to use Webflux' Webclient instead.

Strange that i only found this old issue, when googling the error message. Is it so unusual to use a SchemaRegistryClient in a reactive application?

btw: I am using the dependency management from Spring Boot 2.4.2 and Spring Cloud 2024.0.0