We also have the problem of once the load stops, the sites are still down but Apache/tomcats still seem to be running fine. A restart of either(not even both) fixes the sites.
A guessYour apache server is not releasing connections. If you are running linux, type "netstat -vat" into a terminal on your apache machine, before and after you hit your server. See if the connections are being released.
You could also try typing "ps -e | grep "httpd"" to see how many apache processes are being run before/after. Look in the apache error log, etc. You might find a clue like "MaxClients reached"
QuestionAre you able to log into all your tomcats(through port 8080) independent of apache and get served requests? Can you log onto apache and get a statically served page?
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