[kepler-users] Problem with multiple plays of same KAR.

[Tom Parris]

Dan,

Yes.  That's what we are using and that is the observed behavior.  I just
assumed the problem originated with our own code (which is generally a safe
assumption).

We would be most grateful if you could look into.  But please realize this
is not currently a show stopper for us, just an annoyance.

-- Tom

On Wed, Jan 9, 2013 at 4:23 PM, Daniel Crawl <danielcrawl at gmail.com> wrote:

>
> Hi Tom,
>
> Are you using the MatrixViewer actor to display the matrix tokens?
>
> I recently reported a similar problem with this actor:
>
> The MatrixViewer actor pops up a window displaying a matrix. If the
> window is closed, it does not reappear after running the model again
> (unlike the Display or plotting actors).
>
> http://bugzilla.**ecoinformatics.org/show_bug.**cgi?id=5759<http://bugzilla.ecoinformatics.org/show_bug.cgi?id=5759>
>
> I can look into fixing MatrixViewer.
>
>   --dan
>
>
>
> On 1/9/13 9:27 AM, Tom Parris wrote:
>
>> Dear Kepler-Users:
>>
>> I am hoping you can help point me in the right direction to track down an
>> odd problem we are having (with Kepler trunk on Windows 7 x64 pro, but has
>> been happening for a couple of years through multiple versions of the
>> trunk
>> and on x86 XP systems as well)
>>
>> 1. It involves a simple test KAR for a self-developed actor that uses GDAL
>> to read a matrix and produce two tokens (the matrix and the metadata for
>> the matrix).  I know it is customary to provide an example for replication
>> purposes and I am willing to do so, but it is non trivial to get it
>> installed correctly.  I'm also willing to share the code of the actor for
>> review (with the usual caveats that we know it is not pretty).
>>
>> 2. The KAR opens and runs once without difficulty.  Three display windows
>> are generated.  One with the name of the input file, one with the
>> metadata,
>> and one with the matrix.  If one closes these three windows and presses
>> the
>> "play" button a second time, only the first two windows are produced.  The
>> display window with the matrix is not produced.
>>
>> 3. Closing Kepler and relaunching solves the problem.
>>
>> 4. After pressing "play" a second time, closing the KAR and re-opening
>> fails (due to an issue resolving a simple jython class and instance for an
>> actor that subsets the matrix).
>>
>> 5. If instead of pressing "play" a second time, I close the KAR and
>> re-open
>> it, then it opens successfully and runs once, but not a second time.
>>
>> 6. We have not tracked this problem down previously because in "real"
>> workflows we don't seem to encounter this problem (though we typically
>> only
>> run once per open).  These workflows typically make extensive use of this
>> actor, with multiple instances and multiple firings per workflow.
>>
>> I suspect this is a problem in our code (either the GDAL actor or the
>> jython actor) understanding differences in the roles of initalize(),
>> prefire(), and postfire().
>>
>> One oddity is that self developed GDAL actor outputs the metadata token
>> after it outputs the matrix token.  So, it is odd that the metadata token
>> is displayed on multiple runs, but not the matrix token.
>>
>> -- Tom
>>
>>
>>
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>>
>>
>
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