503 Errors While Cluster Is Still Active

I’ve setup a new mongrel cluster on my VPS, and am noticing a lot if
503 errors if I try to hit the server too many times in succession in
a few seconds. I’ve read that this is usually caused by the cluster
crashing, but I haven’t been seen the cluster crash when I do this.

Does anyone have any other ideas what might cause this?

Thanks for your help.

Justin W.
Owner, Second Gear