为什么我只有一个客户端连接时获得多客户端：来自cometd的真正建议？

Question

我正在将CometD集成到Grails 2.0应用程序中（通过创建一个新的插件 - 我没有使用现有的cometd插件，因为它现在看起来很破碎）。我相信我已经正确配置了一切。我所经历的是，当浏览器连接时，初始元/握手会成功。但是，之后的每个元/连接调用都会返回多个客户端设置为true的建议，关闭长轮询连接。然后每2秒发生一次（我相信的默认时间间隔）。

正如我所说的，我正在使用Grails 2.0和tomcat 7，这是Grails默认使用的。

这里是我目前看到的：

电话/元/握手

Request URL:http://localhost:8080/cometd/handshake 
Request Method:POST 
Status Code:200 OK 

Request Headers 
Accept:*/* 
Accept-Charset:ISO-8859-1,utf-8;q=0.7,*;q=0.3 
Accept-Encoding:gzip,deflate,sdch 
Accept-Language:en-US,en;q=0.8 
Connection:keep-alive 
Content-Length:182 
Content-Type:application/json;charset=UTF-8 
Host:localhost:8080 
Origin:http://localhost:8080 
Referer:http://localhost:8080/ 
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.46 Safari/535.11 
X-Requested-With:XMLHttpRequest 

Request Payload 
[{"version":"1.0","minimumVersion":"0.9","channel":"/meta/handshake","supportedConnectionTypes":["long-polling","callback-polling"],"advice":{"timeout":60000,"interval":0},"id":"1"}] 

Response Headers 
Content-Length:201 
Content-Type:application/json;charset=UTF-8 
Date:Tue, 14 Feb 2012 03:32:24 GMT 
Server:Apache-Coyote/1.1 
Set-Cookie:BAYEUX_BROWSER=dac8yl3vlli7s8x2gymdm2ca177s; Path=/ 

这是回报的有效载荷：

[{"id":"1","minimumVersion":"1.0","supportedConnectionTypes":["callback-polling","long-polling"],"successful":true,"channel":"/meta/handshake","clientId":"115v93y19uvavr159qvzz43yct1","version":"1.0"}] 

我已经验证该Cookie正在在浏览器中设置。与内容长度和ID在每每个请求变更请求负载

Request URL:http://localhost:8080/cometd/connect 
Request Method:POST 
Status Code:200 OK 

Request Headers 
Accept:*/* 
Accept-Charset:ISO-8859-1,utf-8;q=0.7,*;q=0.3 
Accept-Encoding:gzip,deflate,sdch 
Accept-Language:en-US,en;q=0.8 
Connection:keep-alive 
Content-Length:134 
Content-Type:application/json;charset=UTF-8 
Cookie:BAYEUX_BROWSER=dac8yl3vlli7s8x2gymdm2ca177s 
Host:localhost:8080 
Origin:http://localhost:8080 
Referer:http://localhost:8080/ 
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.46 Safari/535.11 
X-Requested-With:XMLHttpRequest 

Request Payload 
[{"channel":"/meta/connect","connectionType":"long-polling","advice":{"timeout":0},"id":"2","clientId":"115v93y19uvavr159qvzz43yct1"}] 

Response Headers 
Content-Length:116 
Content-Type:application/json;charset=UTF-8 
Date:Tue, 14 Feb 2012 03:32:24 GMT 
Server:Apache-Coyote/1.1 

：到/元的后续调用/连接是这个样子。第3个电话回来这个：

通话1：

[{"id":"2","successful":true,"advice":{"interval":0,"reconnect":"retry","timeout":30000},"channel":"/meta/connect"}] 

呼叫2：

[{"id":"3","successful":true,"channel":"/meta/connect"}] 

呼叫3：

[{"id":"4","successful":true,"advice":{"interval":2000,"reconnect":"retry","multiple-clients":true},"channel":"/meta/connect"}] 

从这一点来说，每一个消息回来就像最后一样。我只打开了一个浏览器窗口/选项卡。

这里的web.xml文件的适用部分的副本：

<web-app xmlns="http://java.sun.com/xml/ns/javaee" version="3.0" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> 
... 
<servlet> 
    <servlet-name>cometd</servlet-name> 
    <servlet-class>org.cometd.server.CometdServlet</servlet-class> 
    <load-on-startup>1</load-on-startup> 
    <async-supported>true</async-supported> 
    <init-param> 
     <param-name>timeout</param-name> 
     <param-value>30000</param-value> 
    </init-param> 
    <init-param> 
     <param-name>logLevel</param-name> 
     <param-value>3</param-value> 
    </init-param> 
</servlet> 
... 
<servlet-name>cometd</servlet-name> 
    <url-pattern>/cometd/*</url-pattern> 
</servlet-mapping> 
... 
</web-app> 

的BuildConfig.groovy：

grails.project.class.dir = "target/classes" 
grails.project.test.class.dir = "target/test-classes" 
grails.project.test.reports.dir = "target/test-reports" 
grails.project.target.level = 1.6 

grails.project.dependency.resolution = { 
    // inherit Grails' default dependencies 
    inherits "global" 
    log "warn" // log level of Ivy resolver, either 'error', 'warn', 'info', 'debug' or 'verbose' 
    repositories { 
     mavenCentral() 
    } 
    dependencies { 

     def cometVersion = '2.4.0' 

     compile(group: 'org.cometd.java', name: 'cometd-java-server', version: cometVersion) { 
      excludes 'servlet-api' 
     } 
     compile group: 'org.cometd.java', name: 'bayeux-api', version: cometVersion 
     runtime group: 'org.eclipse.jetty', name: 'jetty-servlets', version: '7.6.0.v20120127' 
     test group: 'org.cometd.java', name: 'cometd-java-client', version: cometVersion   
    } 

    plugins { 
     build(":tomcat:$grailsVersion", 
      ":release:1.0.0") { 
      export = false 
     } 
    } 
} 

最后CometdGrailsPlugin.groovy的doWithSpring部分：

def doWithSpring = { 

    bayeux(BayeuxServerImpl) { bean -> 
     bean.initMethod = 'start' 
     bean.destroyMethod = 'stop' 
    } 

    // the CometdServlet will pick up the Bayeux object from the servlet context 
    bayeuxAttributeExporter(ServletContextAttributeExporter) { 
     attributes = [(BayeuxServer.ATTRIBUTE): ref('bayeux')] 
    }   
} 

希望这不是太多的信息。过去几天我一直在想这个，并且已经用完了想法并且可以真的使用一些帮助

Answer 1

看起来，这与Grails 2.0.0中的一个错误有关。升级到Grails 2.0.1（今天发布）后，错误自行解决。