flex：随机NetConnection.Call.Failed：HTTP：失败 [英] flex : Random NetConnection.Call.Failed: HTTP: Failed
问题描述
使用flex 4 mx.messaging.channels :: SecureAMFChannel
$ b时，我们遇到了一些随机的 NetConnection.Call.Failed：HTTP：Failed$ b
在我们的本地服务器（同一台机器上的服务器/客户端）中，我们从来没有遇到过这个问题，但是当我们上线时，一些用户随机地经历了这个问题（800个用户中大约有5％ ）。
最近，我终于能够在一台客户机（windows XP）上每隔一段时间重现一次问题，我们的局域网在同一个局域网中使用远程服务器（但不是在共享相同局域网的其他客户机上，并且配置大致相同）。
发生这种情况时：
- 使用firebug / flashbug：我可以看到amf请求被发送并等待响应。
- 在服务器上，日志中没有任何内容（没有收到请求）。
- 客户端显示上述错误（ http代码404然后对于后续的请求，所有事情都会恢复正常，直到错误最终再次发生。
（客户端是Windows XP，Firefox + Adobe Flash Player，服务器是WebSphere 7）
我的问题是：
有没有办法找出发生了什么事？
是丢包吗？
是因为客户端浏览器/ adobe player？
谢谢
使用Wireshark（在客户端和服务器端），我可以看到当问题发生时，没有tcp连接：
- Firebug检测到一个传出http amf请求
- Wireshark没有检测到任何活动。
所以它是Adobe Flash Plugin / Firefox的插件容器，对不对？是一个已知的问题？设置我们的浏览器的代理参数解决了问题（无代理的自动化检测或系统代理）。
如果选择代理服务器，Adobe Flash插件会丢失。
We are experiencing some random NetConnection.Call.Failed: HTTP: Failed when using the flex 4 mx.messaging.channels::SecureAMFChannel
We have never had this problem in our local servers (server/client on the same machine), but when we went live, some users experienced this problem randomely (about 5% of the 800 beta users).
Lately, at last i was able to reproduce the problem every once in a while on one client machine (windows XP), in our LAN using a remote server in the same LAN (but not on other client machines who share the same LAN and are roughly the same configuration).
And when this happens:
- Using firebug / flashbug : I can see that the amf request is sent and waiting for a response.
- On the server there is nothing in the logs (no request received).
- After some timeout, the client shows the above error (http code 404).
- Then for the subsequent requests, everything returns to normal untill the error eventually happens again
(Clients are Windows XP, Firefox + adobe flash player, Server is WebSphere 7)
My questions are: is there a way to find out what's going on ? is it a packet loss ? is it because of the client browser / adobe player ?
Thank you
[Edit]
Using Wireshark (on both the client and server side), i can see that when the problem occurs no tcp connection is made: - Firebug detects an outgoing http amf request - Wireshark doesn't detect any activity on either side.
So it's defenitly Adobe Flash Plugin / Firefox plugin container, am i right ? is that a known issue ?
Setting the proxy parameters of our browser resolved the problem ("No Proxy" instade of "Automatic detection" or "system proxy").
It looks like Adobe Flash plugin gets lost when a proxy is selected.
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