partial GET requests consuming entire thread pool

[Roger Keays <ro...@ninthavenue.com.au>]

Hi there,

I'm running tc-5.5.16 and am having a problem with certain clients 
consuming large numbers of ajp threads which are never released. I can 
see from the httpd logs that these clients are all Windows machines and 
each thread is being used to return a 16-64Kb portion of the files they 
are trying to download (usually 15MB+) using a http 206 response with 
the Content-Range header.

It seems the client is keeping the connections open and may be reusing 
them, although not very often (nor at all efficiently). I'm not sure if 
this is a standard IE feature, or if they've got some sort of download 
'accelerator' installed, but it is causing quite a problem. One client 
will easily consume 200 threads and my thread pool is being exhausted 
rapidly.

Has anybody else had this problem?

Cheers,

Roger

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