[yt-users] matplotlib issue on kraken

Eric Hallman hallman at txcorp.com
Wed Sep 5 12:42:03 PDT 2012


Nathan,
  usings pmods in the import leads to an error explosion in the matplotlib imports.  It's even worse than the original test.

Eric
On Sep 5, 2012, at 12:42 PM, Nathan Goldbaum wrote:

> Hi Eric,
> 
> Exactly right.  This is a drop-in replacement for yt.mods on high-latency parallel filesystems (like Kraken, unfortunately).
> 
> There's some discussion on the dev mailing list: http://lists.spacepope.org/htdig.cgi/yt-dev-spacepope.org/2012-January/001760.html
> 
> Unfortunately this isn't covered in the docs (except for a note in the changelog) but it should be in there.
> 
> Cheers,
> 
> Nathan
> 
> On Sep 5, 2012, at 9:40 AM, Eric Hallman wrote:
> 
>> Nathan,
>>   I've been off yt for a while, I'm unaware of pmods.  It's specific to parallel I'm guessing?
>> 
>> Eric
>> On Sep 5, 2012, at 12:38 PM, Nathan Goldbaum wrote:
>> 
>>> Hi Eric,
>>> 
>>> Have you tried from yt.pmods import * instead of the normal yt.mods?
>>> 
>>> Cheers,
>>> 
>>> Nathan
>>> 
>>> On Sep 5, 2012, at 9:37 AM, Eric Hallman wrote:
>>> 
>>>> Hey everyone,
>>>> so this issue seems like one I've had before, but I searched the lists and don't find this exact issue.
>>>> 
>>>> On batch jobs on kraken, attempting to do halo finding, I get an almost immediate crash (with an eternal hang until the time limit is reached) due to matplotlib.  I've been unable to reproduce it in the interactive queue on kraken, which is frustrating.  I'm hoping someone has seen it and can comment.
>>>> 
>>>> this is with yt/dev on kraken, and I set env variables to MPLCONFIGDIR like so:
>>>> 
>>>> export MPLCONFIGDIR=${PBS_O_WORKDIR}/.matplotlib/
>>>> [ ! -d ${MPLCONFIGDIR} ] && mkdir ${MPLCONFIGDIR}
>>>> 
>>>> because if you don't, it fails immediately with perm issues.
>>>> 
>>>> Anyway, it's a simple script and call
>>>> 
>>>> aprun -n 12 python halo_finding.py --parallel
>>>> 
>>>> but the details of the script are not too important, since the job fails when yt is imported, as so: 
>>>> 
>>>> Traceback (most recent call last):
>>>> File "halo_finding.py", line 1, in <module>
>>>>   from yt.mods import *
>>>> File "/lustre/scratch/proj/sw/yt/dev/lib/python2.7/site-packages/yt-2.4dev-py2.7-linux-x86_64.egg/yt/mods.py", line 115, in <module>
>>>>   from yt.visualization.api import \
>>>> File "/lustre/scratch/proj/sw/yt/dev/lib/python2.7/site-packages/yt-2.4dev-py2.7-linux-x86_64.egg/yt/visualization/api.py", line 34, in <module>
>>>>   from plot_collection import \
>>>> File "/lustre/scratch/proj/sw/yt/dev/lib/python2.7/site-packages/yt-2.4dev-py2.7-linux-x86_64.egg/yt/visualization/plot_collection.py", line 26, in <module>
>>>>   from matplotlib import figure
>>>> File "/lustre/scratch/proj/sw/yt/dev/lib/python2.7/site-packages/matplotlib/figure.py", line 18, in <module>
>>>>   from axes import Axes, SubplotBase, subplot_class_factory
>>>> File "/lustre/scratch/proj/sw/yt/dev/lib/python2.7/site-packages/matplotlib/axes.py", line 18, in <module>
>>>>   import matplotlib.contour as mcontour
>>>> File "/lustre/scratch/proj/sw/yt/dev/lib/python2.7/site-packages/matplotlib/contour.py", line 21, in <module>
>>>>   import matplotlib.texmanager as texmanager
>>>> File "/lustre/scratch/proj/sw/yt/dev/lib/python2.7/site-packages/matplotlib/texmanager.py", line 72, in <module>
>>>>   class TexManager:
>>>> File "/lustre/scratch/proj/sw/yt/dev/lib/python2.7/site-packages/matplotlib/texmanager.py", line 92, in TexManager
>>>>   os.mkdir(texcache)
>>>> OSError: [Errno 17] File exists: '/lustre/scratch/hallman/gigaCubes/run1024/.matplotlib/tex.cache'
>>>> 
>>>> In each case, I have deleted tex.cache before I restart, thinking an old version persisted there, but the same error happens.  The most irritating thing is that the job does not kick out of the batch system, so the time continues to run on however many processors you have until the limit is reached (eternal hang!).
>>>> 
>>>> I hope this is something obvious and I'm just dumb.  Let me know.
>>>> 
>>>> Eric
>>>> -- 
>>>> Eric Hallman
>>>> Tech-X Corporation               hallman at txcorp.com
>>>> 5621 Arapahoe Ave, Suite A       Phone: (720) 254-5833
>>>> Boulder, CO 80303                Fax:   (303) 448-7756
>>>> --
>>>> 
>>>> 
>>>> 
>>>> 
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>> 
>> -- 
>> Eric Hallman
>> Tech-X Corporation               hallman at txcorp.com
>> 5621 Arapahoe Ave, Suite A       Phone: (720) 254-5833
>> Boulder, CO 80303                Fax:   (303) 448-7756
>> --
>> 
>> 
>> 
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-- 
Eric Hallman
Tech-X Corporation               hallman at txcorp.com
5621 Arapahoe Ave, Suite A       Phone: (720) 254-5833
Boulder, CO 80303                Fax:   (303) 448-7756
--




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