Java 如果请求超时，HttpClient 会多次执行请求
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HttpClient executes requests multiple time if request timed out
提问by Geek
HttpClientexecutes request 4 times if it times out. If it does not time out then it is working fine. Is it related to HttpClient?
HttpClient如果超时，则执行请求 4 次。如果它没有超时，那么它工作正常。和 有关系HttpClient吗？
采纳答案by Geek
I found that it is HttpClient's default behaviour to execute requests 4 times if it fails. I am not sure about other kind of failures but at least with time out.
我发现HttpClient如果失败则执行请求 4 次是它的默认行为。我不确定其他类型的失败，但至少有超时。
To disable this behaviour do this :
要禁用此行为，请执行以下操作：
DefaultHttpClient client = new DefaultHttpClient();
// Disable default behavior of HttpClient of retrying requests in case of failure
((AbstractHttpClient) client).setHttpRequestRetryHandler(new DefaultHttpRequestRetryHandler(0, false));
Here retry count is set to 0to disable retry.
这里重试计数设置0为禁用重试。
I found solution from this blog.
我从这个博客中找到了解决方案。
回答by Juned Ahsan
Apache HttpClient tries to connect 5 times in case of transport exception. Here is what docsays:
Apache HttpClient 在传输异常的情况下尝试连接 5 次。这是医生所说的：
HttpClient will automatically retry up to 5 times those methods that fail with a transport exception while the HTTP request is still being transmitted to the target server (i.e. the request has not been fully transmitted to the server).
当 HTTP 请求仍在传输到目标服务器时（即请求尚未完全传输到服务器），HttpClient 将自动重试最多 5 次那些因传输异常而失败的方法。
To change this behaviour you need to implement HttpMethodRetryHandlerinterface
要更改此行为，您需要实现HttpMethodRetryHandler接口
回答by Kehinde Adedamola Shittu
This resolved the issue for me. Using httpclient 4.3 and above.
这为我解决了这个问题。使用 httpclient 4.3 及更高版本。
HttpClientBuilder.create().disableAutomaticRetries().build();
