Springboot 3.2.4 - Idle timeout when using RestTemplate and JettyClientHttpRequestFactory

Question

I am using **RestTemplate** to call an external service. One such request took more than 30 seconds and the springboot API call errored with the following message:

Caused by: java.io.IOException: Idle timeout expired: 30000/30000 ms
    at org.springframework.http.client.JettyClientHttpRequest.executeInternal(JettyClientHttpRequest.java:120)
    at org.springframework.http.client.AbstractStreamingClientHttpRequest.executeInternal(AbstractStreamingClientHttpRequest.java:70)
    at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:66)
    at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:112)
    at com.boomi.bundle.service.integration.hook.BaseRestTemplateInterceptor.intercept(BaseRestTemplateInterceptor.java:30)
    at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:88)

Is there a property for configuring the idle timeout? I have already set the following value server.jetty.connection-idle-timeout=800000. Without this property is was timing out at 10 seconds

Any help is appreciated.

Requests made using RESTTemplate should complete if it is within the server.jetty.connection-idle-timeout limit

Answer 1

In Spring 3.4.2 you can provide custom request factory in RestTemplateBuilder:

import org.springframework.http.client.SimpleClientHttpRequestFactory;

public RestTemplateBuilder getBuilder(Duration timeout) {
     return restTemplateBuilder
             .requestFactory(() -> {
                 var factory = new SimpleClientHttpRequestFactory();
                 factory.setConnectTimeout(timeout);
                 factory.setReadTimeout(timeout);
                 return factory;
             })
             .connectTimeout(timeout)
             .readTimeout(timeout);
}

Then depending on your need build rest template:

getBuilder(ofSeconds(120)).build();

This solved issue in my case.

Remember to consider other timeouts when increasing this one (load balancers, etc.)