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From Oleg Kalnichevski <ol...@apache.org>
Subject Re: High server load due to SessionOutputBufferImpl.flush()
Date Mon, 15 Sep 2014 09:22:16 GMT
On Mon, 2014-09-15 at 11:03 +0200, Tobias Bieniek wrote:
> >> 2014-09-14 19:40:17,630 DEBUG [I/O dispatcher 31]
> >> NHttpServerConnection:144 - produceOutput : http-incoming-22190:
> >> Produce output
> >> 2014-09-14 19:40:17,630 DEBUG [I/O dispatcher 183]
> >> NHttpServerConnection:144 - produceOutput : http-incoming-13597:
> >> Produce output
> >> 2014-09-14 19:40:17,630 DEBUG [I/O dispatcher 31]
> >> NHttpServerConnection:112 - close : http-incoming-22190: Close
> >> connection
> >> 2014-09-14 19:40:17,630 DEBUG [I/O dispatcher 183]
> >> NHttpServerConnection:112 - close : http-incoming-13597: Close
> >> connection
> >> 2014-09-14 19:40:17,630 DEBUG [I/O dispatcher 31]
> >> NHttpServerConnection:144 - produceOutput : http-incoming-22190:
> >> Produce output
> >> 2014-09-14 19:40:17,630 DEBUG [I/O dispatcher 183]
> >> NHttpServerConnection:144 - produceOutput : http-incoming-13597:
> >> Produce output
> >> 2014-09-14 19:40:17,630 DEBUG [I/O dispatcher 31]
> >> NHttpServerConnection:112 - close : http-incoming-22190: Close
> >> connection
> >> 2014-09-14 19:40:17,630 DEBUG [I/O dispatcher 183]
> >> NHttpServerConnection:112 - close : http-incoming-13597: Close
> >> connection
> >> 2014-09-14 19:40:17,630 DEBUG [I/O dispatcher 31]
> >> NHttpServerConnection:144 - produceOutput : http-incoming-22190:
> >> Produce output
> >> 2014-09-14 19:40:17,630 DEBUG [I/O dispatcher 183]
> >> NHttpServerConnection:144 - produceOutput : http-incoming-13597:
> >> Produce output
> >> 2014-09-14 19:40:17,631 DEBUG [I/O dispatcher 31]
> >> NHttpServerConnection:112 - close : http-incoming-22190: Close
> >> connection
> >> 2014-09-14 19:40:17,631 DEBUG [I/O dispatcher 183]
> >> NHttpServerConnection:112 - close : http-incoming-13597: Close
> >> connection
> >>
> >> I'm not exactly sure what the problem is here, but it looks wrong to
> >> me. I hope someone here is able to explain what might be happening
> >> there.
> >>
> >
> > I am seeing anything abnormal here, just some connections not being kept
> > alive, which may be perfectly normal depending on the client request
> > composition.
> 
> Have a look at the request IDs. If it was just the connections being
> closed properly then the request IDs should be increasing, but instead
> it seems as if it tries to close the same connections over and over
> again.
> 
> In case I haven't mentioned it yet, we are using default and SSL
> connection factories and most of our traffic is directed to the SSL
> endpoints.
> 
> Tobias
> 

Tobias

If you do not want me to make wild guesses, please make available a
_complete_ context / header log of the session.

Oleg  



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