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Subject: Re: [collections] any objections?
From: robert burrell donkin <robertburrelldonkin@blueyonder.co.uk>
To: Jakarta Commons Developers List <commons-dev@jakarta.apache.org>
In-Reply-To: <Pine.GSO.4.44.0511141636280.16742-100000@shell3.shore.net>
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Date: Wed, 16 Nov 2005 18:51:57 +0000
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On Tue, 2005-11-15 at 13:07 -0500, Michael Heuer wrote:
> On Sat, 12 Nov 2005, Phil Steitz wrote:
> 
> > On 11/12/05, robert burrell donkin <robertburrelldonkin@blueyonder.co.uk> wrote:
> > > On Sat, 2005-11-12 at 13:44 +0000, Stephen Colebourne wrote:
> > > > robert burrell donkin wrote:
> > > > > has anyone run a long stress test?
> > > > >
> > > > > if not, i'm willing to code up something and set it running on my debian
> > > > > box for a few days. i'd appreciate a second pair of eyes on the code (to
> > > > > avoid mistakes).
> > > >
> > > > My attempt at one is attached to bugzilla - SoakLRUMap. I've only run it
> > > > for an hour or so though.
> >
> > I ran something similar for two 3-hour runs with no errors, using a
> > mix of Integer and String keys engineered to get a lot of reuse to
> > happen.  I did lots of shorter runs modifying the the number of
> > buckets, number of threads, and relative frequency of adds / replaces,
> > etc.  It was easy to get the reported errors with synchronization off;
> > but I saw no errors when access was properly synchronized.
> 
> Just for the record, since everyone might not have access to these
> platforms, I saw the same results as Phil while running SoakLRUMap
> overnight on Mac OS X 10.4.3 dual-G4 and dual-G5 hardware with java
> versions 1.4.2_09 and 1.5.0_05.

thanks for the information: it is appreciated :)

the tests on my debian box have been running (so far) for over four days
without an NPE.

maybe we could collate all this on a wiki page?

- robert


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