Were you ever able to sort this out? We're having the same problem, any help 
would be much appreciated.

> I've been all around mod_jrun22 in the last couple days, and I know 
> way more than I want to.  However, I can't get it to work quite right.
> 
> 
> Environment:
> Debian Lenny 5.0.6
> Apache 2.2.9, Worker MPM (ideally)
> JRun4 build 108673
> CF 8.0.1 Enterprise in multiserver config
> 
> I've compiled the connector with apxs2.  Debian's default MPM is the 
> worker (threaded) MPM. 
> 
> Under load I received a bunch of messages in the apache error log, 
> along the lines of "startSync - detected broken mutex!"... In digging 
> through the code, it appears unless APACHE_APR_THREAD is defined when 
> the connector is compiled, the mutex library call is never made.  (At 
> least for linux... Windows connectors have other means)  I find this 
> interesting because wsconfig doesn't define that flag either, and I 
> can't find it anywhere in /usr/include/...  So, I define the flag and 
> recompile.  All the errors go away and the connector works great.
> 
> Except that a couple requests go out to lunch.  Under heavy load, 
> mod_jrun will drop random connections with the following message:
> JRun will not accept request.  Check JRun web server configuration and 
> JRun mappings on JRun server.
> 
> Which responds to the client with an ugly 500 error.
> 
> I understand the error when you send a file extension like .html to 
> JRun and there's no mapping in the web.xml... However, this is for a 
> cfm page, whether it's a index.cfm found via DirectoryIndex or some 
> other cfm page on the server.  99%+ of the requests go through fine, 
> it's just this one request every couple hours that won't behave that's 
> driving me crazy.  So it can't be a config issue.  Turning on tracing 
> would likely write so much information to the log as to be unusable 
> with the load required to reproduce this issue.
> 
> Switching to the perfork MPM removes the problem entirely.  It does, 
> however, significantly increase CPU load on the server.
> 
> I've used JMeter to send tens of thousands of requests against the 
> connector without any issues.  It's very hard to create artificial 
> load to reproduce the problem... but real load makes it happen several 
> times a day.
> 
> Which brings me to my question... Is anyone out there successfully 
> using mod_jrun22 in an Apache 2.2 environment with the worker MPM? CF8.
> 0.1/CF9/CF9.0.1?  Success stories?
> 
> I've considered upgrading JRun/CF to more recent versions, but a quick 
> scan of the JRun connector code in CF9 and 9.0.1 yields only minor 
> changes... Looks like mod_deflate fixes finally made it into 9.0.1 and 
> 9.0 mostly pertained to Winsock2 upgrades.
> 
> Any information would be helpful!
> 
> Thanks.
Joe 

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