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From Oleg Kalnichevski <ol...@apache.org>
Subject Re: High server load due to SessionOutputBufferImpl.flush()
Date Tue, 16 Sep 2014 11:36:33 GMT
On Tue, 2014-09-16 at 13:08 +0200, Tobias Bieniek wrote:
> > If you do not want me to make wild guesses, please make available a
> > _complete_ context / header log of the session.
> I'll see what I can do. The problem is that with our production
> traffic on the server the log files are rotating very fast and it is
> hard to catch a log of one entire request session, but without the
> production traffic the problem doesn't seem to be reproducible.
> Since yesterday more of the I/O workers have started spinning again
> and are cluttering the log files now.
> I know it is wild guessing, but could the problem be related to
> streaming file downloads over SSL that are cancelled on the client
> side? It appears as if the SSL session might be staying in the CLOSING
> state forever with some data in the buffer but unable to flush it out.
> Tobias


This is quite likely to be related to abnormal SSL connection
termination causing the I/O session to spin while trying to complete SSL
session handshake. But I need to see the session log to be 100% sure.


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