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414是什么意思？
在请求的时候使用了Get方法，由于拼接的url过长，超出服务器的限制导致出现了“414 request-uri too large”错误。
The HTTP protocol does not place any a priori limit on the length of a URI. Servers MUST be able to handle the URI of any resource they serve, and SHOULD be able to handle URIs of unbounded length if they provide GET-based forms that could generate such URIs. A server SHOULD return 414 (Request-URI Too Long) status if a URI is longer than the server can handle (see section 10.4.15).
Note: Servers ought to be cautious about depending on URI lengths above 255 bytes, because some older client or proxy implementations might not properly support these lengths.
解决方法：
1、nginx服务器修改
在nginx的nginx.conf修改如下参数的：client_header_buffer_size 512k;
large_client_header_buffers 4 512k;
2、tomcat服务器修改
在Apache的httpd.conf(路径：Apache\conf)配置文件中(直接加就可以)
加的时候位置要注意
LimitRequestLine 40940
LimitRequestFieldSize 40940
问题解决。
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