Spring AI block()/blockFirst()/blockLast() are blocking, which is not supported in thread reactor-http-nio-3

I hope to quickly learn Spring AI + ollama + deepseek r1 (local learning and deployment) through the official documentation, but when I call the interface /ai/generate based on the official documentation, I get the following error:

When I configure the following code, it can work normally.

@Configuration
public class Myconfig {
    @Bean
    public RestClient.Builder builder() {
        return RestClient.builder().requestFactory(new SimpleClientHttpRequestFactory());
    }
}

Environment

ollama version is 0.5.12
Java version: zulu 21

    <dependencies>
        <dependency>
            <groupId>org.springframework.ai</groupId>
            <artifactId>spring-ai-ollama-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-webflux</artifactId>
            <version>3.4.2</version>
        </dependency>
        <dependency>
            <groupId>io.netty</groupId>
            <artifactId>netty-resolver-dns-native-macos</artifactId>
            <version>4.1.116.Final</version>
            <classifier>osx-aarch_64</classifier>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.ai</groupId>
                <artifactId>spring-ai-bom</artifactId>
                <version>1.0.0-M6</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

It might be more appropriate to add RestClient configuration near the specific content of the document, which can help beginners get feedback quickly.

Comment From: heleihelei

same issue,add RestClient.Builder work

Comment From: Vevvev

Ran into a similar issue in OpenAi's API. Was running an Embedding example from https://docs.spring.io/spring-ai/reference/api/embeddings/openai-embeddings.html , and it was that example code that produced the following error.

org.springframework.web.client.ResourceAccessException: I/O error on POST request for "https://api.openai.com/v1/embeddings": block()/blockFirst()/blockLast() are blocking, which is not supported in thread reactor-http-nio-3 at org.springframework.web.client.DefaultRestClient$DefaultRequestBodyUriSpec.createResourceAccessException(DefaultRestClient.java:692) ~[spring-web-6.2.5.jar:6.2.5] at org.springframework.web.client.DefaultRestClient$DefaultRequestBodyUriSpec.exchangeInternal(DefaultRestClient.java:577) ~[spring-web-6.2.5.jar:6.2.5] at org.springframework.web.client.DefaultRestClient$DefaultRequestBodyUriSpec.exchange(DefaultRestClient.java:535) ~[spring-web-6.2.5.jar:6.2.5] at org.springframework.web.client.RestClient$RequestHeadersSpec.exchange(RestClient.java:677) ~[spring-web-6.2.5.jar:6.2.5] at org.springframework.web.client.DefaultRestClient$DefaultResponseSpec.executeAndExtract(DefaultRestClient.java:809) ~[spring-web-6.2.5.jar:6.2.5] at org.springframework.web.client.DefaultRestClient$DefaultResponseSpec.toEntityInternal(DefaultRestClient.java:769) ~[spring-web-6.2.5.jar:6.2.5] at org.springframework.web.client.DefaultRestClient$DefaultResponseSpec.toEntity(DefaultRestClient.java:765) ~[spring-web-6.2.5.jar:6.2.5] at org.springframework.ai.openai.api.OpenAiApi.embeddings(OpenAiApi.java:364) ~[spring-ai-openai-1.0.0-M6.jar:1.0.0-M6] at org.springframework.ai.openai.OpenAiEmbeddingModel.lambda$call$1(OpenAiEmbeddingModel.java:163) ~[spring-ai-openai-1.0.0-M6.jar:1.0.0-M6]