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Date: Tue, 03 Jan 2012 22:26:59 +0100
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Subject: Re: 7.0.22+ fd leak with APR/native
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Mark Thomas wrote:
> I am trying to bring together all the information I have gleaned on this
> so far from the multiple threads to try and find the common factors.
> 
> So far I have:
> - 7.0.21 is OK
> - 7.0.22 has an fd leak
> - 7.0.23 has an fd leak and may leak faster than 7.0.22
> - occurs with APR/native
> - does not occur with BIO
> - has been observed in HTTP & HTTPS
> - use of Comet does not trigger it
> - use of compression does not trigger it
> - separate connection and keep-alive timeouts does not trigger it
> 
> It may be related to POST processing.
> 
> I have tried (and so far failed) to reproduce this. I'll be looking at
> POST processing next. In the meantime, here are some further questions
> to try and narrow things down:
> 
> 1. Does the application where this is observed make use of Servlet 3.0
> async requests?
> 
> 2. Does this leak occur when the NIO connector is used?
> 
> 3. Are there any exceptions in the logs that weren't present in 7.0.21
> or earlier?
> 
> 4. Does the leak occur if sendfile is disabled?
> 
> I also have reviewing the 7.0.21 to 7.0.22 changes on my todo list but
> there are quite a few as I was refactoring the connectors to reduce code
> duplication and ironically, reduce maintenance requirements, at the time.
> 

Suggestion: the "large POST requests" mentioned by a couple of posters suggest file 
uploads, which may imply temporary files used to buffer the files being uploaded, no ?


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