减少 Wildfly 连接超时

Question

I have a problem with resource starvation on my java application running in wildfly. It is making a lot of API calls to other REST resources, and if one of these API:s is slowed down, our system goes down as well.

It has happened that the backend systems are not responding within 14 seconds. So I would like my application to break the connection after maybe 4 seconds. The "problem" is that we are using Client and ClientBuilder from javax.ws.rs.client and we are using wildfly as an implementation.

So I have no idea how to set this timeout parameter. It doesn't appear to be possible from code, and I'm quite lost as to which wildfly subsystem is affected and what properties to set.

Has anyone done this before and know how to set the timeout?

Answer 1

You could use the CONNECT_TIMEOUT Jersey client property as show those posts:

• http://www.adam-bien.com/roller/abien/entry/implementing_connect_and_read_timeouts
• http://www.adam-bien.com/roller/abien/entry/setting_timeout_for_the_jax
• http://www.adam-bien.com/roller/abien/entry/setting_timeout_for_jax_rs

Answer 2

So since wildfly comes bundled with resteasy you have to implement a timeout for that specific implementation. That or force wildfly to use something else. Since forceing jersey upon wildfly didn't seem like the best of ideas(or the easiest) I went with configuring it.

http://blog.eisele.net/2014/12/setting-timeout-for-jax-rs-20-resteasy-client.html

import javax.ws.rs.client.Client;
import org.jboss.resteasy.client.jaxrs.ResteasyClient;
import org.jboss.resteasy.client.jaxrs.ResteasyClientBuilder;

 Client client = new ResteasyClientBuilder()
                .establishConnectionTimeout(100, TimeUnit.SECONDS)
                .socketTimeout(2, TimeUnit.SECONDS)
                .build();

and I've added the following in the pom.xml:

    <dependency>
        <groupId>org.jboss.resteasy</groupId>
        <artifactId>resteasy-client</artifactId>
        <version>3.0.19.Final</version>
    </dependency>

Answer 3

Given that both establishConnectionTimeout and socketTimeout are deprecated.

With this explanation on jboss v7.3 by redhat website :

The following ClientBuilder specification-compliant methods replace certain deprecated RESTEasy methods:

• The connectTimeout method replaces the establishConnectionTimeout method.

  • The connectTimeout method determines how long the client must wait when making a new server connection.

• The readTimeout method replaces the socketTimeout method.

  • The readTimeout method determines how long the client must wait for a response from the server.

This worked for me with RestEASY 3.12.1.Final :

    private Client clientBuilder() {
        return new ResteasyClientBuilder()
            .connectTimeout(2, TimeUnit.SECONDS)
            .readTimeout(10, TimeUnit.SECONDS)
            .build();
    }

        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-client</artifactId>
            <version>3.12.1.Final</version>
        </dependency>