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使用 Apache 2.2.3 (Debian) mod_proxy 和 Jetty 6.1.18 时出现代理错误 502“原因：从远程服务器读取时出错”

tag-icon • tag-icon apache-2.2 jetty
使用 Apache 2.2.3 (Debian) mod_proxy 和 Jetty 6.1.18 时出现代理错误 502“原因：从远程服务器读取时出错”

Apache 正在端口 :80 接收请求，并将它们代理到端口 :8080 的 Jetty

The proxy server received an invalid response from an upstream server
The proxy server could not handle the request GET /.

我的困境：一切正常通常情况下（快速请求，处理几秒或几十秒的请求好的）。问题发生当请求处理需要很长时间时（一会儿？）。

如果我发出请求直接地到 Jetty 端口：8080 的请求已处理完毕。所以问题是有可能位于 Apache 和 Jetty 之间，我正在使用mod_proxy。如何解决？

我已经尝试了一些“技巧”与 KeepAlive 设置有关，但没成功。这是我当前的配置，有什么建议吗？

#keepalive Off                     ## I have tried this, does not help
#SetEnv force-proxy-request-1.0 1  ## I have tried this, does not help
#SetEnv proxy-nokeepalive 1        ## I have tried this, does not help
#SetEnv proxy-initial-not-pooled 1 ## I have tried this, does not help
KeepAlive 20                       ## I have tried this, does not help
KeepAliveTimeout 600               ## I have tried this, does not help
ProxyTimeout 600                   ## I have tried this, does not help

NameVirtualHost *:80
<VirtualHost _default_:80>
    ServerAdmin [email protected]

    ServerName www.mydomain.fi

    ServerAlias mydomain.fi mydomain.com mydomain www.mydomain.com

    ProxyRequests On
    ProxyVia On
    <Proxy *>
            Order deny,allow
            Allow from all
    </Proxy>

    ProxyRequests Off
    ProxyPass / http://www.mydomain.fi:8080/ retry=1 acquire=3000 timeout=600
    ProxyPassReverse / http://www.mydomain.fi:8080/

    RewriteEngine On
    RewriteCond %{SERVER_NAME} !^www\.mydomain\.fi
    RewriteRule /(.*) http://www.mydomain.fi/$1 [redirect=301L]

    ErrorLog /var/log/apache2/error.log

    # Possible values include: debug, info, notice, warn, error, crit,
    # alert, emerg.
    LogLevel warn

    CustomLog /var/log/apache2/access.log combined
    ServerSignature On

</VirtualHost>

这也是失败请求的调试日志：

74.125.43.99 - - [29/Sep/2010:20:15:40 +0300] "GET /?wicket:bookmarkablePage=newWindow:com.mydomain.view.application.reports.SaveReportPage HTTP/1.1" 502 355 "https://www.mydomain.fi/?wicket:interface=:0:2:::" "Mozilla/5.0 (Windows; U; Windows NT 6.1; fi; rv:1.9.2.10) Gecko/20100914 Firefox/3.6.10"
[Wed Sep 29 20:20:40 2010] [error] [client 74.125.43.99] proxy: error reading status line from remote server www.mydomain.fi, referer: https://www.mydomain.fi/?wicket:interface=:0:2:::
[Wed Sep 29 20:20:40 2010] [error] [client 74.125.43.99] proxy: Error reading from remote server returned by /, referer: https://www.mydomain.fi/?wicket:interface=:0:2:::

答案1

我已经解决了这个问题。Keepalive=On应该将其插入到ProxyPass配置行中：

ProxyPass / http://www.dom.fi:8080/ retry=1 acquire=3000 timeout=600 Keepalive=On

看到

Keepalive=On

那里有？这很关键 ;)

答案2

如果您的代理 URL 没有以 结尾，也会出现此错误/。两个路径都应该以 结尾，/或者都不以 结尾。

答案3

您尝试过设置吗setenv proxy-initial-not-pooled 1？

参考这里

答案4

对于我来说，删除服务器应用程序（PHP）中调用的标头值Transfer-Encoding" (binary)解决了以下问题：

[proxy_http:error] [pid 17623] (22)参数无效: [客户端 127.0.0.1:44929] AH01102: 从远程服务器 0.0.0.0:80 读取状态行时出错

其余所有建议都表示喜欢 SetEnv proxy-initial-not-pooled或Keep-Alive不喜欢。

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