FMS server hangs when new clients try to connect.

We are having a problem right now where FMS server will hang when new clients to try connect.  The existing clients still stream the video just fine, only new clients trying to join have issues.    I have been following this case: http://forums.adobe.com/thread/445597 which looks very simular to the issues we are having.   When the problem first started we were running 3.5.1 and it would happen quite often.   Two days ago we upgraded to 3.5.3 and the problems appeared to have gone away.   However, today they have crept back up.   This time fmsedge stopped redirecting to fmscore (which is what I understand it does) and the fmsedge process went to 100% utilization.   fmsedge was still listening on port 80 and 1935 but it would not return any data.

We are running RedHat Enterprise Linux 5.5.   I am told by the Adobe support department that only version 5.2 is supported.   However, I have let them know this is basically impossible to do.  You can't download 5.2 anymore and if you keep your system patched and updated you have to follow the 5.x branch.  

We purchased brand new HP hardware for this server.   It is a HP DL380-G6 Dual-Quad-Core Intel(R) Xeon(R) CPU E5540  @ 2.53GHz with 8GB of RAM.

The fix at the moment is to restart the FMS system and everything clears itself up for some random amount of time.   This this problems happens again.

Our configuration for FMS is stock except for: /opt/adobe/fms/conf/_defaultRoot_/_defaultVHost_/Application.xml - We changed:

      <Queue enabled="true">
      <MaxQueueSize>524288</MaxQueueSize>
      <MaxQueueDelay>4000</MaxQueueDelay>


This is based on the document here: http://www.adobe.com/devnet/flashmediaserver/articles/dynstream_live.html

 

If anyone has any suggestions I would really appreciate any help you can offer.    

Thanks!