如果你在IE(or Firefox)里同时在多个tab来access a flex application that uses messaging with a streaming AMF connection，就会出现下列error

cannot grant streaming connection to FlexClient with id '' because max-streaming-connections-per-session limit of '1' has been reached....

注意：在google chrome里不会有这个问题

原因是：By default, BlazeDS uses 1 as the value for max-streaming-connections-per-session. 解决办法是在service-config.xml里修改"max-streaming-connections-per-session" property的设置for Internet Explorer and Firefox.

例：把"max-streaming-connections-per-session" property设置为8

<channel-definition id="my-streaming-amf" class="mx.messaging.channels.StreamingAMFChannel">     
   <endpoint url="http://{server.name}:{server.port}/{context.root}/messagebroker/streamingamf" class="flex.messaging.endpoints.StreamingAMFEndpoint"/>     
         <properties>     
               <idle-timeout-minutes>0</idle-timeout-minutes>     
               <max-streaming-clients>10</max-streaming-clients>     
               <server-to-client-heartbeat-millis>5000</server-to-client-heartbeat-millis>     
               <user-agent-settings>    
                        <user-agent match-on="MSIE" kickstart-bytes="2048" max-streaming-connections-per-session="8"/>    
                       <user-agent match-on="Firefox" kickstart-bytes="2048" max-streaming-connections-per-session="8"/>    
               </user-agent-settings>    
        </properties>
</channel-definition>