Mercurial > hg > nginx-site
comparison xml/en/docs/http/ngx_http_proxy_module.xml @ 942:ba3d6ade3513
Elaborate on upstream server failures.
Documented that {proxy,fastcgi,memcached}_next_upstream directives define
what is considered an unsuccessful attempt of communication with a server.
| author | Ruslan Ermilov <ru@nginx.com> |
|---|---|
| date | Fri, 05 Jul 2013 10:40:38 +0400 |
| parents | e26a18eb5ccd |
| children | fbb4cc6f8c3d |
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| 941:7d1d53d4d293 | 942:ba3d6ade3513 |
|---|---|
| 8 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd"> | 8 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd"> |
| 9 | 9 |
| 10 <module name="Module ngx_http_proxy_module" | 10 <module name="Module ngx_http_proxy_module" |
| 11 link="/en/docs/http/ngx_http_proxy_module.html" | 11 link="/en/docs/http/ngx_http_proxy_module.html" |
| 12 lang="en" | 12 lang="en" |
| 13 rev="11"> | 13 rev="12"> |
| 14 | 14 |
| 15 <section id="summary"> | 15 <section id="summary"> |
| 16 | 16 |
| 17 <para> | 17 <para> |
| 18 The <literal>ngx_http_proxy_module</literal> module allows to pass | 18 The <literal>ngx_http_proxy_module</literal> module allows to pass |
| 881 only possible if a client was not sent anything yet. | 881 only possible if a client was not sent anything yet. |
| 882 That is, if an error or a timeout occurs in the middle of | 882 That is, if an error or a timeout occurs in the middle of |
| 883 transferring a response, fixing this is impossible. | 883 transferring a response, fixing this is impossible. |
| 884 </para> | 884 </para> |
| 885 | 885 |
| 886 <para> | |
| 887 The directive also defines what is considered an unsuccessful attempt | |
| 888 of communication with a | |
| 889 <link doc="ngx_http_upstream_module.xml" id="server"/>. | |
| 890 The cases of <literal>error</literal>, <literal>timeout</literal> and | |
| 891 <literal>invalid_header</literal> are always considered unsuccessful attempts, | |
| 892 even if they are not specified in the directive. | |
| 893 The cases of <literal>http_500</literal>, <literal>http_502</literal>, | |
| 894 <literal>http_503</literal> and <literal>http_504</literal> are | |
| 895 considered unsuccessful attempts only if they are specified in the directive. | |
| 896 The cases of <literal>http_403</literal> and <literal>http_404</literal> | |
| 897 are never considered unsuccessful attempts. | |
| 898 </para> | |
| 899 | |
| 886 </directive> | 900 </directive> |
| 887 | 901 |
| 888 | 902 |
| 889 <directive name="proxy_no_cache"> | 903 <directive name="proxy_no_cache"> |
| 890 <syntax><value>string</value> ...</syntax> | 904 <syntax><value>string</value> ...</syntax> |