High Number of Established Connections

[kudithipudi]

Please forgive me if I am posting this question in the wrong forum.

I am having a strange problem with one of my servers. We use an in-house application at work which compromises of a bunch of agents installed on workstations connecting to a server through TCP port 8080 via HTTP calls. I am noticing that there are a large number of "ESTABLISHED" connections to 8080, all the time on the server. When I say high, it is around 350-375 (which is approximately the total number of agents hitting this server). This is unusual since the agent should just send a small bit of data and disconnect. Although this might be a problem with the application itself (which I find hard to believe since other agents, hitting other servers do not have so many ESTABLISHED connections), I was wondering if anyone has ideas about why connections would stay ESTABLISHED indefinitely.

Some of the ideas I was thinking were
1) The agents are talking to the server through a proxy server.
2) Server overloaded.

Would appreciate any help/ideas. Thanks much.

- V.

 

[pansophic]

Have you checked to see if the clients are requesting Keep-alive, and if you are allowing it on your web server? That could easily cause the problems that you indicate because I believe that the default (or defacto standard?) for Keep-alive is 5 minutes.
pansophic

 

[WheeDoggy]

It sounds like a self-inflicted DDoS attack.
<cfif IsStressed(objWheeDoggy)>
<!--- 10%/hour/each day --->
<cf_objWheeDoggy BloodPressure=&quot;340%&quot;>
</cfif>