Question

我在Tomcat7上运行了一个Java应用程序，它使用Atmosphere Framework。 Atmosphere是一个Websocket框架。我使用了Atmosphere Sample Chat中的示例应用程序。我的问题是我没有得到连接器以及正在运行的Websocket Atmosphere应用程序的正确配置。

我的问题是：

如何配置HAProxy？
如何配置Tomcat服务器？
如何为APR和NIO连接器配置Tomcat？
我是否必须在我的应用中更改某些内容（例如，我的web.xml）？
如何解决以下错误？

这是我的 HAProxy 配置：

defaults
mode http
log global
option httplog
option  http-server-close
option  dontlognull
option  redispatch
option  contstats
retries 3
backlog 10000
timeout client      25s
timeout connect     5s
timeout server      25s
# timeout tunnel available in ALOHA 5.5 or HAProxy 1.5-dev10 and higher
#   timeout tunnel  3600s
timeout http-keep-alive 1s
timeout http-request        15s
timeout queue        30s
timeout tarpit      60s
default-server inter 3s rise 2 fall 3
option forwardfor


frontend ft_web
  bind *:80 name http
  maxconn 60000

  acl host_testhostdev  hdr(host) -i www.testhost.com

  use_backend apache-8080 if host_testhostdev

  default_backend apache-8080


backend apache-8080
  balance roundrobin

  server websrv1 localhost:8080 maxconn 8000 weight 10 cookie websrv1 check

我的Atmosphere Servlet的 web.xml 部分：

<async-supported>true</async-supported>
<init-param>
   <param-name>org.atmosphere.useNative</param-name>
   <param-value>true</param-value>
</init-param>   

<init-param>
<param-name>org.atmosphere.cpr.AtmosphereInterceptor</param-name>
    <param-value>org.atmosphere.interceptor.HeartbeatInterceptor,org.atmosphere.interceptor.AtmosphereResourceLifecycleInterceptor,org.atmosphere.client.TrackMessageSizeInterceptor</param-value>
</init-param>

<init-param>
   <param-name>org.atmosphere.cpr.broadcaster.shareableThreadPool</param-name>
   <param-value>true</param-value>
</init-param>

<init-param>
   <param-name>org.atmosphere.cpr.sessionSupport</param-name>
   <param-value>true</param-value>
</init-param>
<init-param>
   <param-name>org.atmosphere.cpr.broadcasterCacheClass</param-name>
   <param-value>org.atmosphere.cache.UUIDBroadcasterCache</param-value>
</init-param>

我在Tomcat中更改了 server.xml

!--
<Connector port="8080" protocol="HTTP/1.1"
           connectionTimeout="20000"
           redirectPort="8443" />
 -->

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

这是我得到的错误：

 ERROR cpr.AtmosphereFramework  - If you have more than one Connector enabled, make sure they both use the same protocol, e.g NIO/APR or HTTP for all. If not, org.atmosphere.container.BlockingIOCometSupport will be used and cannot be changed.

和

 2013-08-02 11:03:11,384 [http-nio-8080-exec-26] ERROR test.ReflectionService  - 
 Service method exception in publishDataCreatedCount in service  ClientNotificationUpdateService
 java.lang.NullPointerException
at org.atmosphere.cpr.AtmosphereRequest.setAttribute(AtmosphereRequest.java:569)
at org.atmosphere.cpr.DefaultBroadcaster.executeAsyncWrite(DefaultBroadcaster.java:922)
at org.atmosphere.util.SimpleBroadcaster.queueWriteIO(SimpleBroadcaster.java:192)
at org.atmosphere.cpr.DefaultBroadcaster.deliverPush(DefaultBroadcaster.java:768)
at org.atmosphere.cpr.DefaultBroadcaster.push(DefaultBroadcaster.java:666)
at org.atmosphere.util.SimpleBroadcaster.broadcast(SimpleBroadcaster.java:133)
at test.ClientUpdateService.sendToBoard(ClientUpdateService.groovy:46)
at test.ClientNotificationUpdateService.publishDataCreatedCount(ClientNotificationUpdateService.groovy:179)
at test.ReflectionService.callByConvention(ReflectionService.groovy:59)
at test.ClientUpdateService.methodMissing(ClientUpdateService.groovy:65)
at test.NotificationService.create(NotificationService.groovy:206)
at test.HomeController.addAction(HomeController.groovy:402)
at grails.plugin.cache.web.filter.PageFragmentCachingFilter.doFilter(PageFragmentCachingFilter.java:195)
at grails.plugin.cache.web.filter.AbstractFilter.doFilter(AbstractFilter.java:63)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)

如果我使用IE8和IE9访问我的应用程序，那么这个：

2013-08-08 00:56:19,631 [http-nio-8080-exec-9] ERROR cpr.AtmosphereFramework  - AtmosphereFramework exception
java.lang.IllegalStateException: Not supported.
    at org.atmosphere.cpr.AtmosphereRequest.startAsync(AtmosphereRequest.java:594)
    at org.atmosphere.container.Servlet30CometSupport.suspend(Servlet30CometSupport.java:130)
    at org.atmosphere.container.Servlet30CometSupport.service(Servlet30CometSupport.java:105)
    at org.atmosphere.container.Tomcat7Servlet30SupportWithWebSocket.doService(Tomcat7Servlet30SupportWithWebSocket.java:65)
    at org.atmosphere.container.TomcatWebSocketUtil.doService(TomcatWebSocketUtil.java:87)
    at org.atmosphere.container.Tomcat7Servlet30SupportWithWebSocket.service(Tomcat7Servlet30SupportWithWebSocket.java:61)
    at org.atmosphere.cpr.AtmosphereFramework.doCometSupport(AtmosphereFramework.java:1594)
    at org.atmosphere.cpr.AtmosphereServlet.doPost(AtmosphereServlet.java:176)
    at org.atmosphere.cpr.AtmosphereServlet.doGet(AtmosphereServlet.java:162)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:722)
2013-08-08 00:56:19,670 [http-nio-8080-exec-2] ERROR cpr.AtmosphereFramework  - AtmosphereFramework exception
java.lang.IllegalStateException: Not supported.
    at org.atmosphere.cpr.AtmosphereRequest.startAsync(AtmosphereRequest.java:594)
    at org.atmosphere.container.Servlet30CometSupport.suspend(Servlet30CometSupport.java:130)
    at org.atmosphere.container.Servlet30CometSupport.service(Servlet30CometSupport.java:105)
    at org.atmosphere.container.Tomcat7Servlet30SupportWithWebSocket.doService(Tomcat7Servlet30SupportWithWebSocket.java:65)
    at org.atmosphere.container.TomcatWebSocketUtil.doService(TomcatWebSocketUtil.java:87)
    at org.atmosphere.container.Tomcat7Servlet30SupportWithWebSocket.service(Tomcat7Servlet30SupportWithWebSocket.java:61)
    at org.atmosphere.cpr.AtmosphereFramework.doCometSupport(AtmosphereFramework.java:1594)
    at org.atmosphere.cpr.AtmosphereServlet.doPost(AtmosphereServlet.java:176)
    at org.atmosphere.cpr.AtmosphereServlet.doGet(AtmosphereServlet.java:162)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:722)

Answer 1

好的，这就是我要做的。在Tomcat服务器上安装APR连接器。这将加快生产环境。下载APR并按照安装说明在您的操作系统上进行编译。您不再需要NIO连接器了。

编辑server.xml：

<Connector port="8080" 
            protocol="org.apache.coyote.http11.Http11AprProtocol" 
            URIEncoding="UTF-8" 
            maxThreads="250"
            redirectPort="8443" />

不要使用org.atmosphere.interceptor.AtmosphereResourceLifecycleInterceptor这会给我带来错误。

你的HAProxy配置没问题。您还应该使用atmosphere-runtime-native.jar而不是atmosphere-runtime.jar。

您的错误可能是因为您使用不支持websockets的浏览器连接到使用websockets的应用程序。

如何配置Tomcat和HAProxy以使用WebSocket Framework Atmosphere？

1 个答案: