使用OpenAiService设置Duration.ZERO仍遇SocketTimeoutException求助

我用com.theokanning.openai.service.OpenAIService开发ChatGPT的GUI应用，现在碰到超时问题。设置OpenAiService时用了这段代码：

service = new OpenAiService(apiKey, Duration.ZERO);

请求构建代码如下：

// 处理用户消息并调用OpenAI
ChatCompletionRequest chatRequest = ChatCompletionRequest.builder()
                                                         .model(OPENAI_MODEL)
                                                         // 若未禁用则发送聊天历史
                                                         .messages(!options.get("disableSendingChatGPTHistory") ? returnHistoryAsList() : null)
                                                         .maxTokens(256)
                                                         .build();

ChatMessage response = service.createChatCompletion(chatRequest).getChoices()
                                                          .get(0)
                                                          .getMessage();

本以为设置成无超时就不会有问题，但还是出现了如下堆栈跟踪：

java.lang.RuntimeException: java.net.SocketTimeoutException: timeout
    at io.reactivex.internal.util.ExceptionHelper.wrapOrThrow (ExceptionHelper.java:45)
    at io.reactivex.internal.observers.BlockingMultiObserver.blockingGet (BlockingMultiObserver.java:90)
    at io.reactivex.Single.blockingGet (Single.java:2002)
    at com.theokanning.openai.service.OpenAiService.execute (OpenAiService.java:321)
    at com.theokanning.openai.service.OpenAiService.createChatCompletion (OpenAiService.java:135)
    at com.jareid.openaiapp.api.APIHandler.askGPT_GetResponse (APIHandler.java:372)
    at com.jareid.openaiapp.ui.UserInterfaceScreen.lambda$new$4 (UserInterfaceScreen.java:121)
    at javax.swing.AbstractButton.fireActionPerformed (AbstractButton.java:1967)
    at javax.swing.AbstractButton$Handler.actionActionPerformed (AbstractButton.java:2308)
    at javax.swing.DefaultButtonModel.fireActionPerformed (DefaultButtonModel.java:405)
    at javax.swing.DefaultButtonModel.setPressed (DefaultButtonModel.java:262)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased (BasicButtonListener.java:279)
    at java.awt.Component.processMouseEvent (Component.java:6635)
    at javax.swing.JComponent.processMouseEvent (JComponent.java:3342)
    at java.awt.Component.processEvent (Component.java:6400)
    at java.awt.Container.processEvent (Container.java:2263)
    at java.awt.Component.dispatchEventImpl (Component.java:5011)
    at java.awt.Container.dispatchEventImpl (Container.java:2321)
    at java.awt.Component.dispatchEvent (Component.java:4843)
    at java.awt.LightweightDispatcher.retargetMouseEvent (Container.java:4918)
    at java.awt.LightweightDispatcher.processMouseEvent (Container.java:4547)
    at java.awt.LightweightDispatcher.dispatchEvent (Container.java:4488)
    at java.awt.Container.dispatchEventImpl (Container.java:2307)
    at java.awt.Window.dispatchEventImpl (Window.java:2772)
    at java.awt.Component.dispatchEvent (Component.java:4843)
    at java.awt.EventQueue.dispatchEventImpl (EventQueue.java:772)
    at java.awt.EventQueue$4.run (EventQueue.java:721)
    at java.awt.EventQueue$4.run (EventQueue.java:715)
    at java.security.AccessController.doPrivileged (Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege (ProtectionDomain.java:85)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege (ProtectionDomain.java:95)
    at java.awt.EventQueue$5.run (EventQueue.java:745)
    at java.awt.EventQueue$5.run (EventQueue.java:743)
    at java.security.AccessController.doPrivileged (Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege (ProtectionDomain.java:85)
    at java.awt.EventQueue.dispatchEvent (EventQueue.java:742)
    at java.awt.EventDispatchThread.pumpOneEventForFilters (EventDispatchThread.java:203)
    at java.awt.EventDispatchThread.pumpEventsForFilter (EventDispatchThread.java:124)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy (EventDispatchThread.java:113)
    at java.awt.EventDispatchThread.pumpEvents (EventDispatchThread.java:109)
    at java.awt.EventDispatchThread.pumpEvents (EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.run (EventDispatchThread.java:90)

请问哪里操作有误，为什么还是会出现超时？

问题根源 #

你用Duration.ZERO设置超时是错误的——这个库的OpenAiService构造器中，Duration.ZERO不会被识别为“无超时”，反而会触发默认的超时逻辑，甚至可能直接导致立即超时。

正确设置方式 #

要实现真正的无超时，需要手动构建OkHttpClient实例，将连接、读写超时都设为0（OkHttp中0代表无超时），再传入OpenAiService的构造器：

OkHttpClient client = new OkHttpClient.Builder()
        .connectTimeout(0, TimeUnit.SECONDS)
        .readTimeout(0, TimeUnit.SECONDS)
        .writeTimeout(0, TimeUnit.SECONDS)
        .build();

OpenAiService service = new OpenAiService(apiKey, client);

额外注意事项 #

• 无超时设置在GUI应用中可能导致界面长时间卡顿，建议改用异步调用（比如使用RxJava的订阅方法而非blockingGet），避免阻塞Swing事件线程。
• OpenAI的API本身存在最长响应时间限制，即使客户端设置了无超时，服务端也可能主动断开连接。

内容的提问来源于stack exchange，提问作者Jamie Reid