DWR、Comet4j在Nginx+Tomcat组合下的优化

DWR、Comet4j这类推送框架在Tomcat下运行正常，但在nginx+tomcat组合下，可能会出现断连、延迟等各种问题。

如出现此类问题，可尝试以下优化方式：

1.Nginx-----nginx.conf

worker_processes  1;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    sendfile        on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    gzip  off; #关闭gzip

    server {
        listen       80;
        server_name  localhost:8080;

        location / {
            proxy_connect_timeout 60s;
            proxy_read_timeout 5400s;
            proxy_send_timeout 5400s;
            proxy_pass http://localhost:8080;
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

    }

}

2.Tomcat-----server.xml

 <Connector connectionTimeout="20000" port="8080" protocol="org.apache.coyote.http11.Http11NioProtocol" redirectPort="8443"/>

3.Comet4j-----web.xml

  <!-- ****************************comet4j开始*************************** -->
    <listener>
        <listener-class>org.comet4j.core.CometAppListener</listener-class>
    </listener>
    <listener>
        <description>Observer</description>
        <listener-class> org.comet4j.listener.GPSAlarmObserver</listener-class>
    </listener>
    <servlet>
        <display-name>CometServlet</display-name>
        <servlet-name>CometServlet</servlet-name>
        <servlet-class>org.comet4j.core.CometServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>CometServlet</servlet-name>
        <url-pattern>/cometConn</url-pattern>
    </servlet-mapping>
   <!-- Comet4J可选参数配置-->
	<context-param>
        <description>语言[支持：zh,en,默认:zh，详细http://www.loc.gov/standards/iso639-2/php/English_list.php]</description>
        <param-name>Comet.Language</param-name>
        <param-value>zh</param-value>
	</context-param>
	<context-param>
        <description>请求超时时间/微妙[默认:60000,1分钟,建议至少设置3秒以上]</description>
        <param-name>Comet.Timeout</param-name>
        <param-value>60000</param-value>
	</context-param>
	<context-param>
        <description>连接空闲过期时间/微妙[默认:5000,5秒]</description>
        <param-name>Comet.ConnExpires</param-name>
        <param-value>15000</param-value>
	</context-param>
	<context-param>
        <description>连接检查频率/微妙[默认:5000,5秒]</description>
        <param-name>Comet.ConnFrequency</param-name>
        <param-value>15000</param-value>
	</context-param>
	<context-param>
        <description>缓存信息过期时间/微妙[默认:60000,1分种]</description>
        <param-name>Comet.CacheExpires</param-name>
        <param-value>60000</param-value>
	</context-param>
	<context-param>
        <description>缓存信息过期检查频率/微妙[默认:60000,1分种]</description>
        <param-name>Comet.CacheFrequency</param-name>
        <param-value>60000</param-value>
	</context-param>
	<context-param>
        <description>连接模式[auto(默认)/stream/lpool]</description>
        <param-name>Comet.WorkStyle</param-name>
        <param-value>lpool</param-value>
	</context-param>
	<context-param>
        <description>开启调试[false(默认)/true]</description>
        <param-name>Comet.Debug</param-name>
        <param-value>true</param-value>
	</context-param>
      <!-- ****************************comet4j结束*************************** -->

　　

4.DWR-----web.xml

    <servlet>
        <servlet-name>dwr-invoker</servlet-name>
        <servlet-class>
            org.directwebremoting.servlet.DwrServlet
        </servlet-class>
        <init-param>
            <param-name>allowGetForSafariButMakeForgeryEasier</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>crossDomainSessionSecurity</param-name>
               <param-value>false</param-value>
            </init-param>
        <init-param>
          <param-name>allowScriptTagRemoting</param-name>
          <param-value>true</param-value>
        </init-param>
        <init-param>
          <param-name>classes</param-name>
          <param-value>java.lang.Object</param-value>
        </init-param>
        <init-param>
            <param-name>activeReverseAjaxEnabled</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
           <param-name>initApplicationScopeCreatorsAtStartup</param-name>
           <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>maxWaitAfterWrite</param-name>
            <param-value>100</param-value>
        </init-param>
        <init-param>
            <param-name>debug</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>logLevel</param-name>
            <param-value>WARN</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
  　　<servlet-name>dwr-invoker</servlet-name>
  　　<url-pattern>/dwr/*</url-pattern>
　　</servlet-mapping>

<body onload="init();dwr.engine.setActiveReverseAjax(true);dwr.engine.setNotifyServerOnPageUnload(true);">