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From Philippe Mouawad <philippe.moua...@gmail.com>
Subject Re: Important Regression in nightly build compared to 2.13 or r1715087
Date Fri, 29 Jan 2016 23:47:31 GMT
On Saturday, January 30, 2016, sebb <sebbaz@gmail.com> wrote:

> On 29 January 2016 at 23:31, Philippe Mouawad
> <philippe.mouawad@gmail.com <javascript:;>> wrote:
> > Hello,
> > I made a real load test today using nightly build and faced an important
> > issue.
> >
> > Here are the details:
> > - Test uses 1000 Threads on 1 Instance
> > - It uses "Download Embedded Resources"
> > - Socket Timeout is set to 10s
> >
> > There is no overloading of the machine, no impacting GC
> >
> > Very rapidly, I start getting a lot of errors:
> >
> >
> >    - Non HTTP response code: org.apache.http.conn.ConnectTimeoutException
> >    message:Non HTTP response message: Connect to www.foo.com:80 timed
> out
>
> What is the elapsed time till the timeout occurs?


In the initial test, it happens after 2 minutes at around 300. threads.

with a test at 300 threads and a very rapid rampup (5 seconds, with a
startup delay of 10 seconds)  to reproduce it happens after 16 seconds

>
> >
> > Rate of error varies between 15% and 30%.
> > Note that if I navigate on the application, I don't face the errors.
> >
> > I ran the same test using exactly the same configuration:
> >
> >    - Same machine
> >    - Same JVM version and tuning
> >    - Same user.properties
> >    - Same hc.parameters
> >
> > But  jmeter  r1715087
> > And error rate is 0.30%.
> >
> >
> > Note the target server has a load balancer that returns a keep-alive
> > duration set to 2 (2 seconds).
> >
> > This issue is a blocker one for the release of next version.
> > I compared code with revision 1715087 and I don't see many changes in
> > HTTPHC4Impl that would explain this regression.
> > I commented out some suspects , retried but I get same results.
> >
> >
> > I also upgraded to HttpClient 4.5.2 and uncommented the code expected to
> be
> > added, same results.
> >
> > So for now I tend to suspect an issue in HttpClient/Core.
> > --
> > Regards
> > Philippe M.
>


-- 
Cordialement.
Philippe Mouawad.

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