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Hello:
After seeing no problems with Apache/JServ on a number of platforms for
quite a while, I've run into some pretty serious difficulties under
high-volume situations (load testing, mostly). I'm having trouble figuring
out where the problem is, though.
Here's the situation (versions and platform specs below):
When I send *lots* of requests to JServ (several hundred concurrent
requests), I periodically get...
[Tue Jan 11 17:22:12 2000] [error] [client 207.33.124.11] Premature end
of script headers: /zone/main
...in the Apache error log. Several hundred requests fly by, each
receiving the "premature end of script headers error", at which point JServ
appears to restart (servlet init() methods are called). While the server is
logging "premature end of script headers", the client gets an Apache
"Internal server error" response. No further information is given.
I suspect this isn't a problem with the Java code; if it were, I'd be
seeing a hanging server (if I had thread deadlock or some such), or
exceptions, or some such. As it is, it seems like the server just chokes
and restarts when traffic reaches a certain level. (What that level is has
been very unpredictable.)
Has anyone seen anything like this? I'm at my wit's end, and I'm really not
eager to go to another web server this close to installation time.
This problem has occurred on several platforms ...
- SunOS 5.7, Apache 1.3.9, ApacheJServ-1.1b3 (Sun Solaris VM
Solaris_JDK_1.2.1_04)
- Linux (RedHat 6.0), Apache 1.3.9, ApacheJServ-1.1b2 (Blackdown VM
Linux_JDK_1.2_pre-release-v2)
- Linux (RedHat 5.2), Apache 1.3.3, ApacheJServ-1.0b1 (Blackdown VM
Linux_JDK_1.2_pre-release-v1)
Thanks,
Ben Flaumenhaft
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