[kepler-dev] Fwd: [Kepler - Bug #6439] (New) Double rounding fails in some cases while evaluating Expressions

[Daniel Crawl]

Hi Matt,

I ran Michal's simple_error.xml workflow with Kepler 1.0 and 2.0,
and get them same behavior.

   --dan

On 3/4/14 11:21 AM, Matt Jones wrote:
> Daniel and Christopher --
>
> Do either of you have any insight into this new rounding issue?  Can you
> confirm whether or not this is new behavior?
>
> Matt
>
> ---------- Forwarded message ----------
> From: <noreply at nceas.ucsb.edu>
> Date: Tue, Mar 4, 2014 at 3:24 AM
> Subject: [Kepler - Bug #6439] (New) Double rounding fails in some cases
> while evaluating Expressions
> To:
>
>
>   Issue #6439 has been reported by Owsiak Michal.
> ------------------------------
> Bug #6439: Double rounding fails in some cases while evaluating
> Expressions<https://projects.ecoinformatics.org/ecoinfo/issues/6439>
>
>     - Author: Owsiak Michal
>     - Status: New
>     - Priority: Urgent
>     - Assignee: Derik Barseghian
>     - Category: actors
>     - Target version: 2.3.0
>     - Bugzilla-Id:
>
> It seems that addition of doubles can produce values slightly different
> than they should to be.
>
> Please take a look at attached workflow (simple_error.xml).
>
> Condition that should be satisfied to escape the loop is: 1.7 > 1.5 + 0.1
>
> However, loop is interrupted sooner, because of incorrect calculation of
> doubles. Value of "p" is set to: 1.6000000000000003
>
> This, of course, makes it impossible to use doubles as check points for the
> loops.
>
> However, it seems that casting to string and back works fine (take a look
> at second workflow - simple.xml)
>
> Cheers
>
> Michal
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