I would like to use a specific WebClient in my service class. I get this exception while constructing it:
It looked like it was a dependency issue but a good old clean-install didn't change anything.
Do I need to specify manually a Bean in my configuration?
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.***.Client]: Constructor threw exception; nested exception is java.lang.IllegalStateException: No suitable default ClientHttpConnector found
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:213)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:117)
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:310)
... 122 more
Caused by: java.lang.IllegalStateException: No suitable default ClientHttpConnector found
at org.springframework.web.reactive.function.client.DefaultWebClientBuilder.getOrInitConnector(DefaultWebClientBuilder.java:266)
at org.springframework.web.reactive.function.client.DefaultWebClientBuilder.build(DefaultWebClientBuilder.java:244)
at com.***.Client.<init>(Client.kt:35)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at kotlin.reflect.jvm.internal.calls.CallerImpl$Constructor.call(CallerImpl.kt:41)
at kotlin.reflect.jvm.internal.KCallableImpl.call(KCallableImpl.kt:106)
at kotlin.reflect.jvm.internal.KCallableImpl.callDefaultMethod$kotlin_reflection(KCallableImpl.kt:152)
at kotlin.reflect.jvm.internal.KCallableImpl.callBy(KCallableImpl.kt:110)
at org.springframework.beans.BeanUtils$KotlinDelegate.instantiateClass(BeanUtils.java:788)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:185)
My class is simply:
@Service
class Client {
private val webClient = WebClient.builder()
.baseUrl("https://****.com/")
.defaultHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
.build()
}
In my pom.xml file:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.ws</groupId>
<artifactId>spring-ws-core</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webflux</artifactId>
</dependency>
I found the problem: it turns out that netty dependencies were missing, as I imported the maven artifact that has WebClient but not the rest...
Replacing:
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webflux</artifactId>
</dependency>
With:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
solved it.
As an alternative to Léo Schenider answer, you don't need to replace spring-webflux with spring-boot-starter-webflux (what adds some additional dependencies you don't need), you just need to include:
<dependency>
<groupId>io.projectreactor.netty</groupId>
<artifactId>reactor-netty-http</artifactId>
</dependency>
And leave spring-webflux as it.