SocketException: Unexpected end of file from server 问题解决

时间：2025-02-26 07:27:25


最近使用elasticsearch，通过http访问，结果报错。最后发现是因为设置http消息内容格式type设置错了。发送http请求的方法如下：


public static String httpRequest(String urlStr, String content, String requestMethod) throws IOException {
        URL url = new URL(urlStr);
        HttpURLConnection connection = (HttpURLConnection) ();
        (true);
        (requestMethod);
        (false);
        (1000 * 5);//5秒
        (1000 * 60);//1分钟
        (true);
        ("Content-type", "application/json");
        ("Authorization","esmadmin");
        ();
        Writer writer = new BufferedWriter(new OutputStreamWriter((), "UTF-8"));
        if (content != null && !"".equals(content)) {
            (content);
        }
        ();
        ();
        InputStream in = null;
        if (() >= 400) {
            in = ();
        } else {
            in = ();
        }
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(in));
        StringBuilder response = new StringBuilder();
        String tmp;
        while ((tmp = ()) != null) {
            (tmp);
        }
        if (in != null) {
            ();
        }
        ();
        ();
        return ();
    }

报错如下： 

2017-08-11 08:00:00,441 pool-97-thread-1 ERROR [:run] - Unexpected end of file from server
: Unexpected end of file from server
at (:792)
at (:647)
at (:789)
at (:647)
at .getInputStream0(:1535)
at (:1440)
at (:480)
at (:126)
at (:104)
at (:80)
at $(:511)
at (:308)
at $$301(:180)
at $(:294)
at (:1142)
at $(:617)
at (:745)


后面发现上面建立http请求的httpRequest方法中是有一句代码是关键：

("Content-type", "application/json");


我之前写成 ("Content-type", "JSON");所以一直报错。

后面改成("Content-type", "application/json");就好了。

这个错误对于低版本的ES好像没问题，例如V2.1.2, V5.2.1都没问题。对于ES5.4.3有问题。应该是高版本的ES对于http请求格式加强了校验。




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